This information is not a substitute for medical advice. Always discuss possible side effects with a healthcare professional who knows your medical history. Cephalexin oral capsule can interact with other medications, vitamins , or herbs you may be taking. An interaction is when a substance changes the way a drug works. This can be harmful or prevent the drug from working well.
To help avoid interactions, your doctor should manage all of your medications carefully. Side effects from cephalexin: Taking cephalexin with certain medications raises your risk of side effects from cephalexin. This is because the amount of cephalexin in your body is increased. An example of these drugs is probenecid. Side effects from other drugs: Taking cephalexin with certain medications raises your risk of side effects from these drugs. An example of these drugs is metformin. Taking metformin and cephalexin together may cause kidney problems.
Your doctor may adjust your dose of metformin to reduce this risk. However, because drugs interact differently in each person, we cannot guarantee that this information includes all possible interactions. Always speak with your healthcare professional about possible interactions with all prescription drugs, vitamins, herbs and supplements, and over-the-counter drugs that you are taking. If you have an allergic reaction, call your doctor or local poison control center right away.
If your symptoms are severe, call or go to the nearest emergency room. Taking it again could be fatal cause death. For people with kidney problems: If you have kidney problems or a history of kidney disease, you may not be able to clear this drug from your body.
This may increase the levels of this drug in your body and cause more side effects. Your doctor may adjust your dose if you have kidney disease. Talk with your doctor about whether this drug is safe for you. For pregnant women: Cephalexin is a pregnancy category B drug. That means two things:. Cephalexin should be given to a pregnant woman only if clearly needed.
For women who are breastfeeding: Cephalexin passes into breast milk and may cause side effects in a child who is breastfed. Cephalexin is in a class of medications called cephalosporin antibiotics. It works by killing bacteria. Antibiotics such as cephalexin will not work for colds, flu, or other viral infections. Using antibiotics when they are not needed increases your risk of getting an infection later that resists antibiotic treatment.
Cephalexin comes as a capsule, tablet, and suspension liquid to take by mouth. It is usually taken with or without food every 6 or 12 hours for 7 to 14 days, depending on the condition being treated. Take cephalexin at around the same times every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take cephalexin exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.
You should begin to feel better during the first few days of treatment with cephalexin. If your symptoms do not improve or get worse, call your doctor. Continue to take cephalexin until you finish the prescription even if you feel better. If you stop taking cephalexin too soon or skip doses, your infection may not be completely treated and the bacteria may become resistant to antibiotics.
Cephalexin is also sometimes used for certain penicillin allergic patients who have a heart condition and are having a dental or upper respiratory tract nose, mouth, throat, voice box procedure, in order to prevent them from developing a heart valve infection.
This medication may be prescribed for other uses; ask your doctor or pharmacist for more information. Capsules or tablets — swallow whole with a drink of water. Do not chew or break them. Liquid — if you or your child are taking cefalexin as a liquid, it will usually be made up for you by a pharmacist. The medicine will come with a plastic syringe or medicine spoon to help you measure the right dose. If you do not have one, ask a pharmacist for one. Do not use a kitchen teaspoon as it will not give the right amount.
If you forget to take a dose, take it as soon as you remember, unless it's nearly time for your next dose. In this case, skip the missed dose and take your next dose at the usual time. Try to leave a gap of at least 4 hours between doses.
Never take 2 doses at the same time. Never take an extra dose to make up for a forgotten one. If you forget doses often, it may help to set an alarm to remind you. You could also ask a pharmacist for advice on other ways to remember your medicines.
Accidentally taking 1 extra dose of cefalexin is unlikely to harm you or your child. Speak to a pharmacist or doctor if you're worried or you take 2 extra doses or more. Like all medicines, cefalexin can cause side effects, although not everyone gets them. Fewer than 1 in people may have an allergic reaction to cefalexin.
In most cases, the allergic reaction is mild. Keep taking the medicine, but talk to your doctor or pharmacist if these side effects bother you or do not go away:. In rare cases, cefalexin can cause a serious allergic reaction anaphylaxis. You could be having a serious allergic reaction and may need immediate treatment in hospital. These are not all the side effects of cefalexin. For a full list see the leaflet inside your medicine packet. You can report any suspected side effect to the UK safety scheme.
It's usually safe to take cefalexin during pregnancy and while breastfeeding. For safety, tell your doctor if you're trying to get pregnant, are already pregnant or if you're breastfeeding. Tell your doctor if you're taking any of these medicines before you start taking cefalexin :. Do not take cefalexin at the same time as zinc supplements or anything with zinc in it.
This is important because zinc may reduce the amount of cefalexin in your body, meaning the medicine cannot work as it's meant to. If you do take supplements with zinc in them, make sure there is a gap of at least 3 hours before and after you take your cefalexin.
Reviewed: November 16, Tell your doctor if you have ever had: an allergy to any drug especially penicillin ; liver or kidney disease; or intestinal problems, such as colitis. Tell your doctor if you are pregnant or breast-feeding. Side Effects. Side Effects What are the side effects of Cephalexin Keflex?
Call your doctor at once if you have: severe stomach pain, diarrhea that is watery or bloody even if it occurs months after your last dose ; unusual tiredness, feeling light-headed or short of breath; easy bruising, unusual bleeding, purple or red spots under your skin; a seizure; pale skin, cold hands and feet; yellowed skin, dark colored urine; fever, weakness; or pain in your side or lower back, painful urination.
Common side effects may include: diarrhea; nausea, vomiting; indigestion, stomach pain; or vaginal itching or discharge. Based on FDA pregnancy categories. Interactions What drugs and food should I avoid while taking Cephalexin Keflex? Do not use cephalexin to treat any condition that has not been checked by your doctor. What should I do if I missed a dose of Cephalexin Keflex? If you think you or someone else may have overdosed on: Cephalexin Keflex , call your doctor or the Poison Control center.
If someone collapses or isn't breathing after taking Cephalexin Keflex , call
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