If you do not have a dose-measuring device, ask your pharmacist for one. Use this medicine for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared.
Skipping doses may also increase your risk of further infection that is resistant to antibiotics. Cephalexin will not treat a viral infection such as the flu or a common cold.
Do not share cephalexin with another person, even if they have the same symptoms you have. This medication can cause you to have unusual results with certain medical tests. Tell any doctor who treats you that you are using cephalexin. Store the tablets and capsules at room temperature away from moisture, heat, and light.
Store the liquid medicine in the refrigerator. Acute intravascular hemolysis induced by cephalexin therapy has been reported. If anemia develops during or after cephalexin therapy, perform a diagnostic work-up for drug-induced hemolytic anemia , discontinue cephalexin and institute appropriate therapy.
Seizure Potential Several cephalosporins have been implicated in triggering seizures, particularly in patients with renal impairment when the dosage was not reduced. Anticonvulsant therapy can be given if clinically indicated. Prolonged Prothrombin Time Cephalosporins may be associated with prolonged prothrombin time. Those at risk include patients with renal or hepatic impairment, or poor nutritional state, as well as patients receiving a protracted course of antibacterial therapy, and patients receiving anticoagulant therapy.
Monitor prothrombin time in patients at risk and manage as indicated. Development Of Drug-Resistant Bacteria Prescribing KEFLEX in the absence of a proven or strongly suspected bacterial infection is unlikely to provide benefit to the patient and increases the risk of the development of drug-resistant bacteria.
Careful observation of the patient is essential. In some cases, probenecid may be used along with antibiotics to increase antibiotic strength. Using antibiotics may make birth control pills ineffective.
A second form of contraception is recommended while you're on antibiotics. Back to Top Cephalexin Dosage The dose of cephalexin prescribed will depend on the type of infection and whether the person taking it is a child or an adult.
Here are general guidelines for cephalexin dosage: The usual adult dose ranges from 1 to 4 grams a day, given in divided doses.
Typical adult doses of cephalexin are mg every 6 hours, or mg every 12 hours. The usual dose for a child is 25 to 50 milligrams mg per kilogram of weight, given in divided doses. Keflex capsules come in , , , and mg options. Doses may be doubled for more severe infections. Information for Patients Patients should be counseled that antibacterial drugs including cephalexin capsules, cephalexin for oral suspension, and cephalexin tablets should only be used to treat bacterial infections.
They do not treat viral infections e. When cephalexin capsules, cephalexin for oral suspension, or cephalexin tablets are prescribed to treat a bacterial infection, patients should be told that although it is common to feel better early in the course of therapy, the medication should be taken exactly as directed. Skipping doses or not completing the full course of therapy may 1 decrease the effectiveness of the immediate treatment and 2 increase the likelihood that bacteria will develop resistance and will not be treatable by cephalexin capsules, cephalexin for oral suspension, cephalexin tablets, or other antibacterial drugs in the future.
Diarrhea is a common problem caused by antibiotics which usually ends when the antibiotic is discontinued. Sometimes after starting treatment with antibiotics, patients can develop watery and bloody stools with or without stomach cramps and fever even as late as two or more months after having taken the last dose of the antibiotic. If this occurs, patients should contact their physician as soon as possible.
No information is available about the interaction of cephalexin and metformin following multiple doses of either drug. Although not observed in this study, adverse effects could potentially arise from coadministration of cephalexin and metformin by inhibition of tubular secretion via organic cationic transporter systems. Accordingly, careful patient monitoring and dose adjustment of metformin is recommended in patients concomitantly taking cephalexin and metformin. Carcinogenesis, Mutagenesis, Impairment of Fertility Lifetime studies in animals have not been performed to evaluate the carcinogenic potential of cephalexin.
Tests to determine the mutagenic potential of cephalexin have not been performed. In male and female rats, fertility and reproductive performance were not affected by cephalexin oral doses up to 1. Pregnancy Teratogenic Effects Pregnancy category B Reproduction studies have been performed on mice and rats using oral doses of cephalexin monohydrate 0. There are, however, no adequate and well-controlled studies in pregnant women.
Because animal reproduction studies are not always predictive of human response, this drug should be used during pregnancy only if clearly needed.
Caution should be exercised when cephalexin is administered to a nursing woman. In these trials, pediatric patients may have received cephalexin capsules or cephalexin for oral suspension.
Cephalexin capsules should only be used in children and adolescents capable of ingesting the capsule. No overall differences in safety or effectiveness were observed between these subjects and younger subjects, and other reported clinical experience has not identified differences in responses between the elderly and younger patients, but greater sensitivity of some older individuals cannot be ruled out.
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