Cefadroxil is a first-generation cephalosporin antibiotic. It is marketed as a pill in strengths of 250 mg and 500 mg. In Hong Kong the drug is prescription-only and is regulated under the Pharmacy and Poisons Ordinance, with safety oversight by the Department of Health.
Cefadroxil belongs to the β-lactam family. It binds to bacterial penicillin-binding proteins (PBPs), which are enzymes responsible for cross-linking the peptidoglycan layers of the bacterial cell wall. By inhibiting these PBPs, cefadroxil prevents the construction of a stable cell wall, leading to osmotic rupture and bacterial death.
Cefadroxil is approved in Hong Kong for the treatment of infections caused by susceptible bacteria, including:
The drug is indicated for adults and children who can swallow tablets. Choice of dose depends on infection severity and the susceptibility pattern of the causative organism.
No other off-label indications meet the threshold for inclusion based on current peer-reviewed literature.
Standard adult dosing:
250 mg every 6 hours for mild infections.
500 mg every 6 hours for moderate to severe infections.
Maximum daily dose: 3 g (i.e., six 500 mg tablets per day).
Renal adjustment (estimated creatinine clearance):
CrCl ≥ 30 mL/min: No change.
CrCl 30-15 mL/min: 250 mg every 12 hours.
CrCl < 15 mL/min: 250 mg every 24 hours (or as directed by a clinician).
Administration tips:
Swallow tablets whole with a full glass of water.
If the tablet is difficult to swallow, it may be crushed and mixed with a small amount of food or liquid; ensure the entire mixture is consumed.
Store at room temperature, away from moisture and direct sunlight.
Missed dose: Take it as soon as remembered unless the next scheduled dose is within 2 hours; then skip the missed dose-do not double.
Overdose: Symptoms may include nausea, vomiting, abdominal pain, and diarrhea. Seek emergency medical care; supportive measures are the mainstay of treatment.
Discontinuation: Short courses generally do not require tapering. Longer therapy should be stopped under medical guidance to avoid rebound infection.
This article provides educational information about cefadroxil and is not a substitute for professional medical advice. Treatment decisions, including use for unapproved indications, must be made under the guidance of a qualified healthcare provider. The content is intended for informational purposes and does not constitute medical recommendations. Always consult a physician before starting, stopping, or changing any medication regimen.
Yes. Cefadroxil can be swallowed with or without food. Taking it with food may slightly delay absorption but does not reduce overall effectiveness.
For most skin or urinary infections, treatment ranges from 5 to 7 days. More severe or deep-seated infections may require 10-14 days as directed by a clinician.
Cefadroxil is not a performance-enhancing or prohibited substance under the World Anti-Doping Agency (WADA) list, so it does not trigger a positive doping test.
A mild rash may be harmless, but any skin reaction that spreads, is accompanied by itching, swelling, or difficulty breathing requires immediate medical attention, as it could signal an allergic reaction.
Cefadroxil is occasionally used off-label for dental infections when penicillin allergy exists, but the choice of antibiotic should be made by a dentist or physician based on culture results and clinical judgment.
No specific foods interact with cefadroxil. Maintaining a balanced diet and staying hydrated helps reduce gastrointestinal side effects.
Both are β-lactam antibiotics, but cefadroxil is a first-generation cephalosporin, whereas amoxicillin is a penicillin. Cephalosporins often have broader activity against gram-positive bacteria and are used when penicillin allergy is present.
Cefadroxil passes into breast milk in small amounts. It is generally considered compatible with breastfeeding, but infants should be monitored for diarrhea or rash.
Do not flush tablets. Bring them to a local pharmacy’s medication-return program or follow Hong Kong Health Department guidelines for safe disposal.
Yellowing (jaundice) is not a common side effect. If you notice any unusual discoloration of the skin, eyes, or urine, contact a healthcare professional promptly, as it may indicate liver involvement.
