Cephalexin syrup is the liquid form of the antibiotic cephalexin (a cephalosporin). It’s used to treat various bacterial infections such as skin/soft tissue infections, throat/ear infections, some respiratory infections, and certain urinary tract infections. It’s common for kids because it’s easy to dose with a measuring syringe.
Key points about dosing (usual ranges; your exact dose should come from your doctor):
- Adults: commonly 250 mg to 500 mg every 6 to 12 hours. Some infections may use 750 mg to 1 g every 12 hours. Do not exceed 4 g per day unless your clinician says so.
- Children: typically 25–50 mg/kg per day, divided into two doses (every 12 hours) or sometimes every 6 hours, for 7–14 days (duration depends on the infection). Your child’s dose will be based on weight and the specific infection.
How to take it:
- Shake the bottle well before each use.
- Use the dosing syringe or cup that comes with the medicine to measure the dose accurately.
- It can be taken with or without food. If it upsets the stomach, taking it with a small amount of food might help.
- Complete the full prescribed course even if you feel better sooner.
Storage and handling:
- Check the label for exact storage recommendations (some suspensions require refrigeration, others do not). Keep the bottle tightly closed when not in use and protect from extreme heat.
- Throw away any unused suspension after the labeled time period.
Common side effects:
- Diarrhea, nausea, vomiting, stomach upset
- Rash or itching (allergic reaction)
- Rarely, severe diarrhea or signs of an allergic reaction (swelling, hives, trouble breathing) – seek urgent care if this happens
Warnings and interactions:
- Do not use if you are allergic to cephalexin or to other cephalosporins, or if you have a history of a severe penicillin allergy.
- Tell your clinician about other medicines you take (e.g., antacids, probenecid, or blood thinners) as they can affect absorption or risk of interactions.
- If you have kidney disease, dose adjustments may be needed.
- Pregnancy and breastfeeding: consult your clinician; cephalexin is commonly used in pregnancy when needed, but discuss benefits and risks.
If you’d like, tell me:
- your age and weight (for a rough calculation if you’re asking about dosing),
- the exact infection being treated,
- whether you’ve been prescribed this syrup and the labeled dose,
- and any allergies or other medicines you take.
I can help you estimate a dose or clarify the instructions on your bottle. This is general information and not a substitute for your clinician’s advice.