Generic Name and Formulations:
Ampicillin 250mg, 500mg; caps.
Various generic manufacturers
250–500mg 4 times daily. Continue therapy for 3 days after symptoms improve. N. gonorrhoeae: 3.5g with 1g probenecid once.
<20kg: 50–100mg/kg per day in 3–4 divided doses. ≥20kg: as adult. Continue therapy for 3 days after symptoms improve.
Cephalosporin, imipenem, other allergy or mononucleosis: not recommended. Monitor blood, renal, and liver function in long-term use. Pregnancy (Cat.B). Nursing mothers.
May cause false (+) glucose test with Clinitest, Benedict's or Fehling's soln. Potentiated by probenecid. May increase risk of rash with allopurinol.
Anaphylaxis, urticaria, GI upset, blood dyscrasias.
Formerly known under the brand names Principen, Totacillin, Pfizerpen-A, Penbritin, Omnipen, Amcill (caps, susp); Polycillin-N, Totacillin-N, Penbritin-S, Omnipen-N (inj).
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