Phenoxymethylpenicillin (Penicillin V) vs Isoniazid

National NHS prescribing compared (Prescription Cost Analysis)

Data updated March 2026

Phenoxymethylpenicillin (Penicillin V) was dispensed 1,206.7× as often as Isoniazid in March 2026 — 316,146 items versus 262 in England.

316,146items

Phenoxymethylpenicillin (Penicillin V) · March 2026

NHSBSA Prescription Cost Analysis

262items

Isoniazid · March 2026

NHSBSA Prescription Cost Analysis

Figure 1. Phenoxymethylpenicillin (Penicillin V) versus Isoniazid: national items dispensed by month

▬ Phenoxymethylpenicillin (Penicillin V) · ╌ Isoniazid

Source: NHSBSA Prescription Cost Analysis, to March 2026

Phenoxymethylpenicillin (Penicillin V) versus Isoniazid, March 2026
Measure	Phenoxymethylpenicillin (Penicillin V)	Isoniazid
Items, March 2026	316,146	262
Items, last 12 months	2,981,784	3,246
Net ingredient cost, March 2026	£659,506	£36,882