Storing Medicines Safely Through the Indian Summer

Most medicines are licensed for storage below 25°C. Across much of central India, indoor temperatures sit above that for weeks at a stretch between April and June. Summer does not require a different medicine cupboard — it requires attention to heat specifically, which is a narrower problem than general storage.

Related reading: How to store medicines safely at home

Why this matters

Heat degradation is silent. A tablet exposed to a hot room for weeks generally looks unchanged, so nothing prompts you to question it. What changes is potency — and for a blood pressure tablet, an antibiotic or insulin, that matters.

What medical guidance says

What is most vulnerable to heat

• Insulin and other biological products, which are the least heat-tolerant of all.
• Suppositories and pessaries, which can soften or melt outright.
• Creams, ointments and gels, which may separate or change consistency.
• Eye and ear drops.
• Metered-dose inhalers, which are pressurised canisters and should not be left in hot places.
• Liquid antibiotics, particularly once reconstituted.
• Effervescent and dispersible tablets, which are also moisture-sensitive.

The vehicle problem

A parked car in Indian summer sun becomes far hotter than the outside air within a short time. Dashboards, glove compartments and boots are the worst places in the vehicle. This is the most common way medicines are seriously heat-damaged, and it usually happens during an ordinary trip home from the pharmacy.

When collecting medicines in summer, make the pharmacy your last stop rather than your first, carry them in the passenger cabin with the air conditioning on, and take them inside immediately on arrival.

Cold-chain items

For refrigerated medicines such as insulin, carry an insulated pouch with a cool pack in summer, and make sure the medicine does not touch the cool pack directly — freezing damages insulin permanently, and a frozen vial is no longer usable even if it thaws. At home, store in the main body of the fridge, not the door.

Practical summer habits

• Move the medicine cupboard to the coolest interior room, away from any wall that catches afternoon sun.
• Keep medicines away from the top of the refrigerator, which is warm from the motor.
• Do not store medicines on a windowsill, in a car, or in a bag left in the sun.
• When travelling in summer, keep medicines in hand luggage, never in a checked bag or a vehicle boot.
• Buy smaller quantities during the hottest months if you have limited cool storage.
• Check creams, drops and suppositories more often than tablets, as changes are visible in them first.

A power cut long enough to warm the fridge matters for insulin. If this happens, keep the door shut and ask your pharmacist before using the vial rather than assuming either way.

When to consult a doctor

Speak to your pharmacist before using a medicine that has been left in a hot vehicle or direct sun, a refrigerated product left out for an extended period or that has frozen, a cream or ointment that has separated, or a suppository that has softened.

Bring the pack so the batch number and storage instructions are visible. Never stop a prescribed medicine because you suspect heat damage — ask first, so a replacement can be arranged without a gap in treatment.