India is among the largest consumers of antibiotics in the world, and resistance to the most common ones is now routine in hospital laboratories. The practical consequence is simple: infections that a three-day course used to clear increasingly need stronger, costlier drugs given by injection. Almost every driver of that shift is something a patient and a prescriber can change together.
What antibiotic resistance actually is
Bacteria multiply every twenty minutes or so, and each generation throws up small genetic changes. When an antibiotic is present but not in a high enough dose or for long enough to finish the job, the bacteria that happen to survive are the ones least affected by that drug. They multiply and pass the trait on, including to unrelated species. Resistance is therefore not something your body develops — it is something the bacteria around you develop, and it spreads through families, hospitals, water and food.
The five habits that drive it in India
- Antibiotics for viral fever. Most fevers seen in general practice are viral. An azithromycin course started on day one of a fever changes nothing about the illness and everything about resistance.
- Over-the-counter purchase. Buying two tablets of a strong antibiotic from a chemist for a sore throat is both illegal and the classic under-dosing scenario.
- Stopping early. Feeling better on day two of a five-day course and stopping leaves the hardier bacteria alive.
- Reusing leftovers. A strip left over from a previous illness is almost always the wrong drug, wrong dose or wrong duration for the new one.
- Skipping the culture test. For urinary infections and repeated chest infections, a culture and sensitivity report tells the doctor which drug still works. Treating blindly is a coin toss in high-resistance areas.
What the law already requires
Antibiotics sit under Schedule H, and the higher-risk ones under Schedule H1, of the Drugs & Cosmetics Rules 1945. A Schedule H1 pack carries a red vertical band on the left margin, and the pharmacist must record the patient's name, the prescriber and the quantity supplied in a register retained for three years. If a chemist hands over ciprofloxacin, levofloxacin or a similar drug without asking for a prescription, that sale is not legal.
You can check the schedule and prescription status of any brand on its InfoMyMed medicine page, and read the full guide to Schedule H, H1, X and G if the label markings are unfamiliar.
Six questions worth asking your doctor
- Is this infection likely bacterial, or are we treating just in case?
- Would a culture test change which antibiotic I need?
- What is the shortest effective duration for this drug?
- Should I take it with food, and what should I avoid alongside it?
- What side effects mean I should stop and call you?
- When should I feel better, and what do we do if I don't?
How to take a course properly
Space doses evenly — a twice-daily antibiotic means roughly every twelve hours, not both doses in the evening. Finish the prescribed duration unless your doctor tells you to stop. Take dairy, antacids and iron supplements at least two hours away from tetracyclines and fluoroquinolones, which they bind and block. Report a rash, severe diarrhoea, tendon pain or breathlessness immediately. Never share a strip with a family member whose symptoms look the same.
Frequently asked questions
Do antibiotics work for viral fever, cold or flu?
No. Antibiotics kill bacteria only. Colds, most sore throats, flu, dengue and COVID-19 are viral, so an antibiotic adds side effects and resistance risk without shortening the illness.
Can I stop the antibiotic once I feel better?
Follow the duration your doctor prescribed. Stopping a course early because symptoms eased can leave partially resistant bacteria behind; equally, courses in India are sometimes longer than needed, so ask your doctor at the start how many days are actually required.
Is it legal to buy antibiotics without a prescription in India?
No. Antibiotics are Schedule H and H1 drugs under the Drugs & Cosmetics Rules 1945. Schedule H1 medicines such as ciprofloxacin and levofloxacin must be sold against a registered practitioner's prescription and recorded in a pharmacy register kept for three years.
Are leftover antibiotics safe to reuse for a similar illness?
No. The dose, the drug and the duration are matched to a specific infection and body weight. Reusing leftovers is one of the commonest causes of under-dosing, which is exactly how resistant strains develop.
What is the difference between an antibiotic and a probiotic?
An antibiotic kills bacteria causing infection. A probiotic supplies helpful gut bacteria and is sometimes given alongside to reduce antibiotic-associated diarrhoea. A probiotic does not treat the infection.