Reading a medicine carton: what each line on the pack actually means

Every Indian medicine carton carries a set of legally mandated declarations. Most people read only the brand name and the expiry. The rest is useful, and occasionally important.

The brand name and the composition

The large name — Doxerid, Zitis-500 — is the brand. Below or beside it, usually in smaller type, is the composition: the actual molecules and their strengths.

The composition is the medically meaningful line. Two brands with the same composition and strength are, regulatorily speaking, the same medicine. When a doctor writes a brand and the pharmacist offers a substitute, the composition line is what you compare.

Rx, and the red line

A capital ℞ or the words Schedule H mean the medicine is prescription-only. It cannot legally be sold without a registered medical practitioner's prescription, and the pharmacist is required to retain a record.

A red vertical stripe on the left edge of the carton marks Schedule H1 drugs — a narrower category covering certain antibiotics, anti-TB drugs and sedatives where misuse drives resistance or dependence. Schedule H1 sales must be recorded in a separate register with the prescriber's and patient's details, retained for three years.

If you see that red stripe, the medicine is one where finishing the prescribed course, and not self-medicating with leftovers, genuinely matters.

Batch number, Mfg. and Exp.

The batch number identifies one specific production run. If a quality issue is ever found, recalls are issued by batch — which is why keeping the carton until the medicine is finished is sensible advice.

Mfg. is the manufacturing date, Exp. the expiry. Expiry on an Indian pack means the last date the manufacturer guarantees the stated potency under the stated storage conditions. Past it, the medicine is not usually toxic; it is unreliable, which for an antibiotic amounts to the same practical problem.

M.L. No. and the manufacturer's address

M.L. No. is the manufacturing licence number issued by the state drug controller, followed by the name and address of the plant that actually made the medicine.

Many packs also carry a separate "Marketed by" line. These are often different companies, and that is entirely normal — a marketing company develops and positions the brand, takes responsibility for it in the market, and commissions a licensed manufacturer to produce it. Both entities are accountable, and both are printed on the pack.

MRP and the storage line

M.R.P. is inclusive of all taxes; no pharmacist may charge above it.

The storage instruction — usually "Store below 25°C, protect from light and moisture" — is not boilerplate. Stability data supporting the expiry date is generated under those conditions. A strip kept in a car glovebox through a north Indian summer has not been stored below 25°C, and its expiry date no longer means what it says.

What to check before you buy

• The carton is sealed and undamaged, with no signs of re-taping.
• Batch number, Mfg. and Exp. are printed identically on both carton and blister strip.
• The expiry allows enough time to complete the full course.
• The composition matches what was prescribed.