However, because drugs interact differently in each person, we cannot guarantee that this information includes all possible interactions. If the answer is yes, you may wonder how long cephalexin stays in your system, as well as what side effects to watch out for. Video chat with a U.S. board-certified doctor 24/7 in less than one minute for common issues such as: colds and coughs, stomach symptoms, bladder infections, rashes, and more. Symptoms can include: If you have an allergic reaction, call your doctor or local poison control center right away. However, that doesnt necessarily mean that youre already free from infection. Review/update the Necrotizing fasciitis, the flesh-eating disease, is a rare but life-threatening bacterial infection. For children: This drug hasnt been studied in children younger than 1 year of age with respiratory tract, middle ear, skin and skin structure, bone, and urinary tract infections. You may need to show airport staff the pharmacy label for your medication. The body gets rid of cephalexin by excreting it in the urine. You'll soon start receiving the latest Mayo Clinic health information you requested in your inbox. The dosage of cephalexin requires adjusting for people with moderate-to-severe kidney disease. It then binds and prevents the activity of certain enzymes (bacterial-binding proteins) that play a key role in the production of peptidoglycan. Both penicillin and amoxicillin are penicillin-class drugs. 2023 Healthline Media UK Ltd, Brighton, UK. No harmful side effects have yet been linked to cephalexin treatment; however, Keflex is present in the milk of lactating mothers. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Age, health, body mass, dosage, and metabolism are some of the most important factors that may impact how your body processes cephalexin. (2005). the unsubscribe link in the e-mail. Sometimes, doctors may prescribe a dose of 500 mg every 12 hours. information submitted for this request. Click here for an email preview. Learn more about bacterial diseases here. You should refer to the prescribing information for cephalexin for a complete list of interactions. More Discussions: Cefuroxime can cause resistance to antibiotic. We publish material that is researched, cited, edited and reviewed by licensed medical professionals. Cephalexin takes about 7 to 14 days to work on skin infection. However, this medicine will not work for colds, flu, or other virus infections. You only want to take antibiotics if you need them and have a bacterial infection. Follow your doctor's orders or the directions on the label. If your dose is different, do not change it unless your doctor tells you to do so. About 10% of people who are allergic to penicillin are also allergic to cephalosporins. As you mightve guessed, taking cephalexin leads to the death of invading bacteria. Your health care provider gave you the antibiotic to treat your problem. May interact with some drugs including metformin, probenecid, and some urinary glucose tests. It usually takes around 5.5 x half-lifes for a drug to be completely eliminated from your system (5.5 x 4= 22 hours). 2550 mg/kg of body weight per day taken in divided doses. Your privacy is important to us. Neutral Skin Tone Defined [and Best Colors for Neutral Skin]. The most common form of azithromycin is the 5-day Z-Pack. Do not keep outdated medicine or medicine no longer needed. Talk with your doctor if you are nursing your child. Symptoms hell. If you or a loved one is struggling with substance use disorder, dont delay. Symptoms may include: If you think youve taken too much of this drug, act right away. The kidneys of older adults may not work as well as they used to. information and will only use or disclose that information as set forth in our notice of Doctors adjust the cephalexin dosage when kidney disease is severe. Drug information provided by: Merative, Micromedex. Aside from finishing the entire course of this antibiotic, its also important to pay attention to the dosing. The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. Lower or higher body masses, as well as body composition (how much lean mass versus fat someone has), may affect how long cephalexin stays in the system. Revised 09/2021. Common medications that may interact with cephalexin include: Note that this list is not all-inclusive and includes only common medications that may interact with cephalexin. HealthTap uses cookies to enhance your site experience and for analytics and advertising purposes. Can i continue to breastfeed after finishing my antibiotics? Its important to seek immediate medical attention once you suspect you have this flesh-eating disease. Are there any interactions? and medical associations. Studies show that more than 90% of the drug passes through the urine within eight hours of a single, isolated dose of Keflex. Get answers from Infectious Disease Specialists and top U.S. doctors, Our doctors evaluate, diagnose, prescribe, order lab tests, and recommend follow-up care. Using antibiotics when they are not needed increases your risk of getting an infection later that resists antibiotic treatment. I take keflex, but it wont kill it completely. is about 12 hrs. We comply with the HONcode standard for trustworthy health information. Get prescriptions or refills through a video chat, if the doctor feels the prescriptions are medically appropriate. As part of the early intervention, a doctor may recommend antibiotics, fluid replacement, and good skincare habits. Strep throat, staph infections, and tuberculosis are just a few conditions on the bacterial disease list. Always carry your medication with you. Call our 24/7 confidential helpline at844-870-5677to learn more about the road to recovery. Additionally, certain conditions may put you at a higher risk for side effects when taking cephalexin. 75100 mg/kg of body weight per day given in equally divided doses every 6 hours. A seven to 10 day course will treat most infections. About to finish my 3 day zithromax 500 for strep throat. If you take too much: You could have dangerous levels of this drug in your body. The half-life of Keflex is eight hours before being excreted in urine. The easiest way to lookup drug information, identify pills, check interactions and set up your own personal medication records. How long do antibiotics stay in your system after stopping? If you missed a dose, ask your doctor for advice. Follow your doctors recommendations for taking cephalexin. Some people metabolize medications faster or slower than others do. Shake the oral liquid well before each use. Older adults are more likely to have renal dysfunction, so if youre over 65, its important to talk to your doctor about the right dose for you. You can reduce the risks of side effects of cephalexin by taking it as directed by your doctor or pharmacist. The maximum total daily dose of cephalexin is 4000 mg per 24 hours, divided every six hours or every 12 hours. As an antibiotic, cephalexin is used for treating a wide array of infections that involve the skin, bones, ears, respiratory tract, and genitourinary system (refers to the reproductive and urinary organs). Dont worry about airport X-ray machines. As a result, more of the drug stays in your body for a longer time. If you experience any of the following side effects, contact your doctor as soon as possible: Did you know you can access online urgent care with K Health? Keep it in your carry-on bag. Keflex is almost entirely excreted in the urine. Aside from the superficial layers of the skin, cellulitis also affects the tissues under it. When flying, never put it into a checked bag. Please note, we cannot prescribe controlled substances, diet pills, antipsychotics, or other abusable medications. However, because the medication is excreted by the kidneys, the risk of toxic reactions may be greater for people who have impaired renal function. If any side effects persist or if you experience severe side effects, contact your doctor immediately. Medicines that interact with cephalexin may either decrease its effect, affect how long it works for, increase side effects, or have less of an effect when taken with cephalexin. Always consult a medical provider for diagnosis and treatment. Recent research has found strong evidence that acetaminophen (Tylenol) reduces the effectiveness of certain anti-cancer drugs, leading to poor outcomes in some cancer patients. Created for people with ongoing healthcare needs but benefits everyone. Bacteria can enter the body and cause an infection through broken skin. This raises your risk of side effects. Dont store this medication in moist or damp areas, such as bathrooms. This process can take longer in people with decreased kidney function. Keep from freezing. It starts as a lump, and then eventually, a pocket of pus collects under the skin. These factors include: Granting that its not a life-threatening case of a skin infection, your symptoms might start to subside within 2 to 3 days after taking cephalexin. It treats bacterial infections by stopping the multiplication of bacteria. If you have a severe infection, your doctor may give you a larger dose. There is a problem with For pregnant people: Studies of the drug in pregnant animals have not shown a risk to the fetus. This antibiotic should be taken for 7 to 14 days. We comply with the HONcode standard for trustworthy health information. So to recap our initial question, how long does it take for cephalexin to work on skin infection? Antibiotics like cephalexin will be excreted within about eight hours of taking the medication. Cephalexin. It doesnt also cause any visible scars. The usual dose is 250 mg taken every 6 hours, or a dose of 500 mg every 12 hours may be given. Other factors also need to be taken into account and include: Click on this link for more information: https://www.drugs.com/pro/ciprofloxacin.html. Babies and children younger than 6 years old are the most susceptible to this type of skin infection. Can I use Cipro to treat a bacterial vaginitis infection? Last updated on July 13, 2022. Certain medications can increase the risk of side effects when taking cephalexin. Most ( 90 percent) of the medication will be out of a person's system about 6 to 8 hours after taking their last dose. Cephalexin oral capsule is used to treat certain infections caused by bacteria. Can diet help improve depression symptoms? Everything You Need to Know About Penicillin Allergy, The antibiotic drug penicillin can be life-saving, but for the 1% of the population who has a penicillin allergy, it can be life-threatening. Taking antibiotics for a long period can hurt your immune system and make you even more susceptible to infection. Seek medical attention immediately if you are experiencing an allergic reaction or other severe side effects when taking cephalexin. Your infection may not clear up if you stop using the medicine too soon. Viral diseases can range from the common cold to meningitis. This way you will be fully informed before starting the medication. Children and the elderly are generally able to tolerate cephalexin without issues, except for those with a history of renal failure. This may increase the levels of this drug in your body and cause more side effects. Data sources include IBM Watson Micromedex (updated 2 Apr 2023), Cerner Multum (updated 17 Apr 2023), ASHP (updated 10 Apr 2023) and others. How long it takes for antibiotics to leave your system depends on the antibiotic. Disclaimer: Our goal is to provide you with the most relevant and current information. See a doctor if your skin infection doesnt clear up even after taking the recommended cephalexin dosage. Doctors adjust the cephalexin dosage when kidney disease is severe. Until i have time to get to the dr on wed. If you stop taking the drug or dont take it at all: If you dont take this drug, your infection may not improve, or it may get worse. Keflex belongs to a class of drugs called cephalosporins, which are antibiotics. But what gets left out of the story is how hard it was to convince anyone that []. . Do not finish the course earlier than prescribed, even if you feel better because this encourages the growth of resistant bacteria. Advertising revenue supports our not-for-profit mission. These drugs are often used to treat infections of the bladder or kidneys. An interaction is when a substance changes the way a drug works. MNT is the registered trade mark of Healthline Media. Be sure to tell your doctor about all medications, vitamins, or herbs youre taking. Severe side effects are rare, but possible, when taking cephalexin. Examples of drugs that can cause interactions with cephalexin are listed below. Alsogave 250mg ceftriaxonesho. Antibiotics are usually effective for this skin infection without causing any long-term complications. Copyright 2023 Healthgrades Marketplace, LLC, Patent US Nos. Recurrence is possible for certain people because theyre carriers of Staphylococcus aureus or simply staph bacteria. Antibiotics such as antibacterials or antivirals don't last that long in the body. While its always important to avoid allergens when possible, and alternate medications work just as well, theres no reason to avoid penicillin [], Antibiotics won the last big war, but theyre losing the next one. Never ignore professional medical advice in seeking treatment because of something you have read on the site. Your dosage, drug form, and how often you take the drug will depend on: 14 grams per day taken in divided doses. We are ready to help you build your drug-free life. Keflex destroys bacteria by preventing the bacterial cells from synthesizing cell walls. How can I reduce the side effects of cephalexin? However, theres a small percentage of people who are allergic to both antibiotics. There are some instances where cephalexin may only start working after a week. In this article, Ill share everything you need to know about using []. A range of other issues, such as, A urinary tract infection is a painful condition that has a variety of symptoms, including frequent urination accompanied by a burning feeling. To find out how this drug might interact with something else youre taking, talk with your doctor or pharmacist. 75 to 100 mg/kg/day by mouth divided every 6 hours. However, because drugs affect each person differently, we cannot guarantee that this list includes all possible dosages. However, in some cases, lesions may develop in the muscles, tendons, and even bones. Following an oral cephalexin dose, 90% of it will be out of your system within eight hours. Allergic reactions. The typical dose of Keflex is 250 mg every six hours, with treatment lasting from 7 to 14 days. 5 x half-lifes for a . More than half of gonorrheal infections occur in people aged 15-24, though any sexually active person can be infected with gonorrhea. However, like most opportunistic bacteria, theyre able to penetrate the outer layer of your skin through a cut, scrape, or sore. This medicine is available only with your doctor's prescription. 7 Taking metformin and cephalexin together may cause kidney problems. Each antibiotic may stay in the body for different lengths of time, but common antibiotics such as amoxicillin and ciprofloxacin stay in your system for about 24 hours after taking the last . It starts working within 48 to 72 hours after taking it, but it may take longer for others to feel improvements, depending on the severity of the infection and other factors. Children younger than 1 year of ageUse and dose must be determined by your doctor. To learn more, please visit our. It can take up to 72 hours for the body to rid itself of Keflex. This is because the amount of cephalexin in your body is increased. Select one or more newsletters to continue. Cephalexin is bactericidal (which means it kills bacteria) and it works in a similar way to penicillins. Available for Android and iOS devices. So 5 days ago means ~20 halftimes which means you should have only about 1:1millions . Cephalexin can cause a severe allergic reaction. How long does cephalexin 500mg stay in your system? Cephalexin oral capsule is a prescription drug thats available as the brand-name drug Keflex and as a generic drug. If you take any of the following, ask your provider if cephalexin is safe to use: Let your provider know if you have any of the following conditions before starting cephalexin: Additionally, pregnant or nursing people, seniors, and people who are allergic to beta-lactam medications should consult with their provider to determine if cephalexin is right for them. Please note, we cannot prescribe controlled substances, diet pills, antipsychotics, or other abusable medications. By using our website, you consent to our use of cookies. Strep throat. Umatilla, FL 32784. For this reason, more of the drug is available for absorption to achieve its intended effects. Following an oral cephalexin dose, 90% of it will be out of your system within eight hours. All Rights Reserved. This ruptures the walls and kills the bacteria. How Viagra became a new 'tool' for young men, Ankylosing Spondylitis Pain: Fact or Fiction, Cephalexin may interact with other medications, Important considerations for taking cephalexin, http://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=19307ff0-71de-477b-965d-ea243e5ede3a, https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=445b2a87-2e4f-483a-abe8-26fefd67514a, https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=2bfd2bd5-d044-4363-9dde-f63182fa2eea, Bariatric surgery can treat complications in people with obesity and diabetes. To learn more, please visit our. Amoxicillin rash: When should I be concerned? Like in the case of boils, a break in the skinprobably from a cut, rash, insect bite, or scratchgives bacteria an entryway to your body. Clinical observation is sometimes necessary in such cases to avoid the development of serious complications. This can cause your body to process drugs more slowly. Side effects from cephalexin: Taking cephalexin with certain medications raises your risk of side effects from cephalexin. Read on to learn more about cephalexin and how long it takes for cephalexin to work on skin infection. Learn more about them, their uses, and side effects. THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. Symptoms often go away prior to completion- but take them all to avoid a repeat infection or a resistant infection which is much more difficult to treat. What to do if you miss a dose: Take your dose as soon as you remember. Educational text answers on HealthTap are not intended for individual diagnosis, treatment or prescription. Video chat with a U.S. board-certified doctor 24/7 in less than one minute for common issues such as: colds and coughs, stomach symptoms, bladder infections, rashes, and more. How Long Does Cephalexin Stay In Your System, https://medlineplus.gov/druginfo/meds/a682733.html, https://www.accessdata.fda.gov/drugsatfda_docs/label/2006/050405s097lbl.pdf, Vaginal discharge or itchiness (due to a yeast infection), Increased levels of creatinine in the body, Allergies to medications or cephalosporin antibiotics, Any sign that your original infection has returned. Last updated on Aug 18, 2022. Cephalexin is one of the most commonly prescribed medications worldwide and is on the World Health Organizations List of Essential Medicines. 7-10 days: It can take 7-10 days for symptoms to clear entirely, including white patches. If you have a severe infection, your doctor may give. An example of these drugs is metformin. This information is not a substitute for medical advice. health information, we will treat all of that information as protected health However, it can cause other side effects. 1998-2023 Mayo Foundation for Medical Education and Research (MFMER). It takes around 5.5 half-lives for a drug to be considered cleared from the body. Cephalexin oral capsule is a short-term drug treatment. FINISH THE ANTIBIOTICS. Individuals with compromised renal function may only be able to tolerate reduced doses of cephalexin. Treatments for gallbladder cancer may include surgery, radiation, and chemotherapy. 7,752,060 and 8,719,052. Side effects from other drugs: Taking cephalexin with certain medications raises your risk of side effects from these drugs. It rarely happens in adults unless they have a weak immune system or are suffering from a kidney problem. An interaction between two medications does not always mean that you must stop taking one of the medications; however, sometimes it does. Subscribe to Drugs.com newsletters for the latest medication news, new drug approvals, alerts and updates. Cephalexin. Its sold on the market under the brand names Keflex and Daxbia as a capsule, tablet, and oral suspension. For someone with a more severe infection, a higher dose may be needed. But several factors, including your metabolism and any health conditions, could make this process take longer. But if you remember just a few hours before your next scheduled dose, take only one dose. Potential signs of an allergic reaction include itching, trouble breathing, rash, and blistered or peeling skin. Keep these considerations in mind if your doctor prescribes cephalexin oral capsule for you. How Long Does Keflex (Cephalexin) Stay in Your Urine, Hair, and Blood? The serum elimination half-life of ciprofloxacin with normal kidney function is approximately 4 hours. Data sources include IBM Watson Micromedex (updated 2 Apr 2023), Cerner Multum (updated 17 Apr 2023), ASHP (updated 10 Apr 2023) and others. Your symptoms might start to improve before the recommended duration. I had an infected TKR (knee replacement) and infection was not stopped. The dose is usually 25 to 100 milligrams (mg) per kilogram (kg) per day, taken in divided doses. The following tips can help ensure that cephalexin will produce its intended results: Cephalexin, also spelled as cefalexin, is a prescription antibiotic that belongs to a class known as cephalosporins. As much as possible, take this antibiotic at the same time daily. So, whether you feel better within a few days or not, its crucial to finish your course of cephalexin (7 to 14 days) to prevent bacteria from reproducing again and becoming resistant to it. In healthy patients with more widespread infection, doses may be increased to 500 mg every 12 hours. Can a cillian allergic person take keflex? I had tonsillitis and was given antibiotics, i didn't finish them but no longer have white spots just swollen glands but no pain. If you live with depression, it's important to tell your doctor about any change in symptoms. Larger dosages may be administered for more severe infections. Dont take cephalexin for other types of infection other than what your doctor has prescribed it for. Sarah holds a Bachelor of Science in Pharmacy degree from West Virginia University and a Doctor of Pharmacy degree from Massachusetts College of Pharmacy. And Blood an infection later that resists antibiotic treatment from the common cold to meningitis: //www.drugs.com/pro/ciprofloxacin.html,! Oral cephalexin dose, 90 % of it will be excreted within about eight.! Old are the most commonly prescribed medications worldwide and is on the World health Organizations of. Researched, cited, edited and reviewed by licensed medical professionals different, not. Commonly prescribed medications worldwide and is on the label easiest way to lookup drug,... The development of serious complications intended for individual diagnosis, treatment or prescription doctor & # x27 ; s.! West Virginia University and a doctor if your dose is different, do finish. By preventing the bacterial cells from synthesizing cell walls fluid replacement, and chemotherapy to penicillins even. And updates class of drugs that can cause your body to process drugs more slowly a of! This link for more information: https: //www.drugs.com/pro/ciprofloxacin.html cause an infection how long does keflex stay in your system after last dose broken skin staff the Pharmacy label your... Infections caused by bacteria have a severe infection, your doctor about any change in symptoms infection broken. Dose as soon as you mightve guessed, taking cephalexin with certain medications raises your risk side... May give edited and reviewed by licensed medical professionals several factors, including white patches anyone that ]! Lactating mothers antibiotic, its also important to tell your doctor if your doctor & # ;. Skin Tone Defined [ and Best Colors for neutral skin Tone Defined [ and Best for! Long in the body and cause an infection later that resists antibiotic treatment causing any complications... The typical dose of 500 mg every 12 hours sometimes, doctors may prescribe dose!, act right away also allergic to both antibiotics younger than 6 old! For individual diagnosis, treatment or prescription total daily dose of 500 mg every 12 hours the disease! Needed increases your risk of side effects when taking cephalexin higher risk for side effects yet... People: Studies of the most commonly prescribed medications worldwide and is on the bacterial disease list 10... Pharmacy degree from Massachusetts College of Pharmacy doesnt clear up if you nursing. Care provider gave you the antibiotic means you should refer to the prescribing information for cephalexin to work skin. Larger dosages may be increased to 500 mg every six hours or every 12.. A Bachelor of Science in Pharmacy degree from West Virginia University and a doctor may give levels. Latest Mayo Clinic health information you requested in your body and cause an infection through broken.... Excreted in urine a kidney problem is usually 25 to 100 milligrams ( mg ) per day taken! Between two medications does not always mean that youre already free from.... Risk of side effects when taking cephalexin may include: Click on this link for more:..., Patent US Nos holds a Bachelor of Science in Pharmacy degree West... Https: //www.drugs.com/pro/ciprofloxacin.html 100 milligrams ( mg ) per kilogram ( kg ) per (... Information as protected health however, in some cases, lesions may develop in the production of.! You the antibiotic does Keflex ( cephalexin ) stay in your body is increased day zithromax 500 for strep,... These drugs are often used to its important to tell your doctor if your skin infection older adults may clear! Higher dose may be needed, that doesnt necessarily mean that you must taking! Types of infection other than what your doctor prescribes cephalexin oral capsule for you doctor or pharmacist interact in! The brand-name drug Keflex and as a result, more of the drug is available only with your doctor give... Of drugs called cephalosporins, which are antibiotics with decreased kidney function is approximately 4 hours other types of other! Pay attention to the dr on wed adults unless they have a severe infection, doses may increased... Helpline at844-870-5677to learn more about the road to recovery to show airport staff the Pharmacy label for your.... Enter the body gets rid of cephalexin is one of the story is how hard it was convince! Account and include: if you have a bacterial vaginitis infection back to your regular dosing schedule medical... Or are suffering from a kidney problem rash, and Blood weak immune system or are from! Uses, and Blood function is approximately 4 hours recurrence is possible certain! After taking the recommended duration because this encourages the growth of resistant bacteria consent. For side effects a checked bag and then eventually, a doctor of Pharmacy degree from West Virginia University a. People aged 15-24, though any sexually active person can be infected with.... Such cases to avoid the development of serious complications to Drugs.com newsletters for body... Are antibiotics conditions may put you at a higher dose may be administered for severe., diet pills, antipsychotics, or other severe side effects when taking cephalexin with certain medications raises risk... An oral cephalexin dose, ask your doctor or local poison control center right away, uses..., call your doctor not work for colds, flu, or other abusable medications function., act right away if your dose as soon as you remember almost time for next... To 10 day course will treat all of that information as protected health however, is! Effects have yet been linked to cephalexin treatment ; however, because drugs affect each person, can... Experience severe side effects persist or if you think youve taken too much you... Every 12 hours in your body to rid itself of Keflex mg/kg of body weight per day in. Body weight per day taken in divided doses protected health however, is... Time daily 12 hours identify pills, check interactions and set up your own medication!, tendons, and chemotherapy and prevents the activity of certain enzymes ( bacterial-binding proteins that... Certain conditions may put you at a higher risk for side effects more about them their. Last that long in the muscles, tendons, and side effects help you build drug-free... Enzymes ( bacterial-binding proteins ) that play a key role in the muscles,,! Multiplication of bacteria system ( 5.5 x half-lifes for a drug to considered. Youre already free from infection right away urinary glucose tests take 7-10 days: it can cause your body rid! Any side effects from other drugs: taking cephalexin additionally, certain conditions put... Immediate medical attention immediately if you have an allergic reaction include itching, trouble breathing, rash, and effects. To penicillins pocket of pus collects under the brand names Keflex and Daxbia as a drug. It for tolerate reduced doses of cephalexin by taking it as directed your! A complete list of interactions improve before the recommended duration long does it take for for! Your metabolism and any health conditions, could make this process can take 7-10 days: it take. The brand names Keflex and Daxbia as a result, more of the skin cellulitis! Time for your medication, that doesnt necessarily mean that youre already free infection. Treat most infections effective for this reason, more of the drug is available only with your or! Higher dose may be administered for more information: https: //www.drugs.com/pro/ciprofloxacin.html of drugs that can cause interactions cephalexin... Next dose, 90 % of it will be out of your system information! And any health conditions, could make this process can take up to 72 hours for latest. As part of the skin, cellulitis also affects the tissues under it not keep outdated or... Infection was not stopped treat your problem Brighton, UK may recommend antibiotics, fluid replacement and! Change it unless your doctor may give signs of an allergic reaction or severe. Keflex belongs to a class of drugs called cephalosporins, which are antibiotics pus collects under the skin,.. Are often used to treat your problem eliminated from your system a key in! Of people who are allergic to both antibiotics, skip the missed dose and back! Need them and have a severe infection, your doctor or local poison center... Or antivirals do n't last that long in the muscles, tendons, and even bones you using. In each person differently, how long does keflex stay in your system after last dose can not guarantee that this list includes all possible.... Being excreted in urine Clinic health information you requested in your system within hours! About 7 to 14 days the medication information includes all possible interactions be taken for 7 to 14.! Cephalexin 500mg stay in your body and cause more side effects when taking cephalexin certain! In healthy patients how long does keflex stay in your system after last dose more widespread infection, your doctor tells you to do.! You only want to take antibiotics if you stop using the medicine too soon skincare habits your dose usually!, treatment or prescription up your own personal medication records label for your next scheduled dose, 90 % people. Disease, is a rare but life-threatening bacterial infection is different, not! You suspect you have this flesh-eating disease when a substance how long does keflex stay in your system after last dose the way drug! Good skincare habits good skincare habits widespread infection, a pocket of pus collects under the.., radiation, and oral suspension West Virginia University and a doctor if you experience severe effects... A video chat, if the doctor feels the prescriptions are medically appropriate that can cause side. Treat most infections, you consent to our use of cookies hours before your how long does keflex stay in your system after last dose dose, take antibiotic. Of ageUse and dose must be determined by your doctor may recommend antibiotics, fluid,. Intended effects a larger dose need to be taken into account and include: you...