<unk> , also known as penicillin G (PenG) or BENTEN, and in military slang "Peanut Butter Shot" is an antibiotic used to treat a number of bacterial infections. This includes pneumonia, strep throat, syphilis, necrotizing enterocolitis, diphtheria, gas gangrene, leptospirosis, cellulitis, and tetanus. It is not a first-line agent for pneumococcal meningitis.<unk>  is given by injection into a vein or muscle. Two long-acting forms benzathine<unk>  and procaine<unk>  are available for use by injection into a muscle. Side effects include diarrhea, seizures, and allergic reactions including anaphylaxis. When used to treat syphilis or Lyme disease a reaction known as Jarisch–Herxheimer may occur. It is not recommended in those with a history of penicillin allergy. Use during pregnancy is generally safe in the penicillin and β-lactam class of medications.<unk>  is on the World Health Organization's List of Essential Medicines.
Benzylpenicillin
Extended-spectrum penicillin
Penicillin
Phenoxymethylpenicillin
Procaine benzylpenicillin
Carbenicillin
Tetracycline
Oxytetracycline