Walk into almost any pharmacy in Kathmandu and you will find calcium tablets next to antibiotics, and an omega-3 softgel two shelves down from blood pressure tablets. Same counter, same paper bag. So it is fair to ask whether there is any real difference between them.

There is, and it matters most when you are deciding what to take, how much to spend, and whether to tell your doctor about it.

A medicine is approved to treat something

A medicine (pharmaceutical drug) contains an active ingredient that has been tested for a specific use: lowering blood pressure, killing a bacterial infection, controlling blood sugar. Before it can be sold in Nepal it has to be registered with the Department of Drug Administration (DDA) under the Drugs Act, 2035 (1978). The company has to show that the product contains what it says, in the stated amount, and that it was made to an accepted manufacturing standard.

Because medicines are meant to change how your body works, they also come with known side effects, interactions and correct doses. That is why many of them can only be sold against a prescription.

A supplement is meant to add to your diet

A dietary supplement or nutraceutical supplies nutrients or other compounds your body uses anyway: vitamins, minerals, fish oil, probiotics, plant extracts. The idea is to fill a gap or support normal function, not to cure a disease. A good label will say exactly that, with wording like "not intended to diagnose, treat, cure or prevent any disease".

The word "nutraceutical" is just nutrition plus pharmaceutical. It usually means a supplement made in a dose form you would recognise from medicines (tablets, capsules, softgels, sachets), often with a more specific formula than a basic multivitamin.

Supplements in Nepal still need registration

A common belief is that supplements are unregulated. In Nepal that is not true. Supplements have to be registered before they are imported or sold. Food-type supplements fall under the Department of Food Technology and Quality Control, and products with medicinal ingredients or claims fall under the DDA.

The DDA has been fairly vocal about this. In March 2024 and again in January 2025 it publicly told pharmacies to stop selling unregistered food supplements and nutraceuticals, and warned that such stock could be confiscated. So if a pharmacy sells you a supplement, it is supposed to be a registered one.

Five practical differences

  • Claims. A medicine can say it treats a condition. A supplement can talk about supporting normal health, not curing anything.
  • Evidence. Medicines need clinical evidence for their stated use. Supplements vary a lot. Some ingredients, like vitamin D or iron for people who are low in them, have strong evidence. Others have very little.
  • Prescriptions. Many medicines need one. Supplements usually do not, which also means nobody is automatically checking whether you need it.
  • Dose. With a medicine, the dose is set for you. With a supplement it is easy to double up without noticing, for example by taking a multivitamin plus a separate vitamin D plus a calcium tablet that also contains vitamin D.
  • Interactions. "Natural" does not mean it cannot interact with your medicines. Calcium, iron and some herbal extracts are well known for it. We cover this in our post on taking supplements with prescription medicine.

Where the line gets blurry

Some products sit in the middle. High-dose vitamin D injections, iron prescribed for anaemia, or folic acid prescribed in pregnancy are used as treatment, so they are handled like medicines. A low-dose vitamin D tablet sold for general wellbeing is a supplement. Same nutrient, different purpose and different rules.

Ayurvedic and herbal products are another grey area. Nepal has its own Department of Ayurveda and Alternative Medicine, and many traditional products are registered as medicines in that system. A 2020 study by that department found toxic heavy metals in some medicinal plants, which is a good reason to buy only registered products from a licensed pharmacy rather than loose powders from an unknown source.

So which one do you need?

If you have a diagnosed condition, the medicine your doctor prescribed comes first. A supplement does not replace it. If you are generally healthy, you may not need a supplement at all, or you may need one specific nutrient. Our guide to which vitamins people actually need goes through the common ones.

Either way, tell your doctor and pharmacist about everything you take, including the supplements. It takes thirty seconds and it is the simplest way to avoid a problem.

This article is general information, not medical advice. Talk to your doctor or pharmacist about your own medicines and health.