Penicillinum

Penicillin (the substance); chief active form benzylpenicillin / Penicillin G, C16H18N2O4S (free acid). Prepared from the antibiotic produced by the mould Penicillium chrysogenum / P. notatum (P. rubens). · Penicillin, Penicillin G, Benzylpenicillin; homeopathic name Penicillinum (occasionally Penicillium).

Modern MM

A modern drug remedy used chiefly for the ill-effects, sensitivities and allergic/toxic sequelae of penicillin antibiotic therapy, and as an intercurrent/antidotal remedy. There is no recorded classical proving; the sphere of action is read from penicillin's known toxicology (skin, fever, gut, hypersensitivity).

Key symptoms

Used primarily for the ill-effects of penicillin/antibiotic administration — drug-induced skin allergy (rashes, urticaria), drug fever and febrile states, and diarrhoeal / gastric disturbance following antibiotic courses; and as an intercurrent remedy to restore action of a well-selected remedy that has stalled in a patient with a history of heavy antibiotic use. These indications derive from penicillin's documented toxicological and allergic action, NOT from a formal homeopathic proving. No characteristic mind or general "keynotes" can be authentically given, because no proving has produced them.

Worse (aggravation)

Not established. No proving-derived modalities exist; modalities should not be attributed to this remedy.

Better (amelioration)

Not established. No proving-derived modalities exist for this remedy.

Manohar V Nagaiah

Materia Medica of Modern Homeopathic Medicine · 2026

Penicillin, Penicillin G, Benzylpenicillin; homeopathic name Penicillinum (occasionally Penicillium).

Source & Nature

Penicillinum is the homeopathic preparation of penicillin, the first clinically used antibiotic. The drug is a beta-lactam compound originally obtained from the mould Penicillium notatum (now P. rubens) and today produced industrially from Penicillium chrysogenum. Its principal molecule is benzylpenicillin (Penicillin G), C16H18N2O4S. Discovered by Alexander Fleming in 1928 and developed for therapy by Florey and Chain in the 1940s, penicillin is one of the most important — and most allergenic — drug classes in conventional medicine.

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Classical texts are in the public domain. Educational reference only — not medical advice.