Pen-G

For use in the treatment of severe infections caused by penicillin G-susceptible microorganisms when rapid and high penicillin levels are required such as in the treatment of septicemia, meningitis, pericarditis, endocarditis and severe pneumonia.

Benzylpenicillin has a bactericidal action against gram positive bacteria, gram negative cocci, some other gram negative cross-linking stage of peptidoglycan production through binding and inactivation of transpeptidases on the inner surface of the bacterial cell membrane thus inhibiting bacterial cell wall synthesis. It is inhibited by penicillinase and other β-lactamases.

May increase the risk of methotrexate toxicity. Increased plasma concentration with probenecid. Antagonism of bactericidal effect with bacteriostatic antibacterials (e.g. erythromycin, tetracyclines).

Nausea, vomiting, stomatitis, black or hairy tongue, rash, fever, serum-like sickness, convulsions, interstitial nephritis, haemolytic anaemia, granulocytopenia, agranulocytosis, leucopenia, thrombocytopenia

Pregnancy category B. Either animal-reproduction studies have not demonstrated a fetal risk but there are no controlled studies in pregnant women or animal-reproduction studies have shown an adverse effect that was not confirmed in controlled studies in women in the 1st trimester.

Lactation: Monitor electrolyte, hepatic, renal, cardiac and haematologic function; signs and symptoms of anaphylaxis during 1st dose.

Patient with history of allergy esp β-lactam allergy and/or asthma, seizure disorder. Diabetic patients. Renal impairment. Pregnancy and lactation.

Benzylpenicillin & Phenoxymethyl penicillin

Symptoms: Agitation, confusion, asterixis, hallucinations, stupor, coma, multifocal myoclonus, seizures and encephalopathy, hyperkalaemia.

Management: Symptomatic and supportive treatment.

Store between 20-25°C. Reconstituted soln: Store between 2-8°C.