Quick takeaways A generic contains the same active ingredient as the original, yet the tablet may look nothing like it. Here is what has to match, what is allowed to differ and when a question is worth asking.
A generic medicine contains the same active ingredient, in the same strength and form, as the brand-name original it copies. Before it can be sold, regulators in most countries require evidence that it behaves in the body in an equivalent way. What can differ are the inactive ingredients, the colour, shape and size of the tablet, the packaging and the price. For most people a generic is a dependable and often cheaper option, but there are a few situations where it is worth asking your pharmacist or prescriber before switching.
Key terms in plain words
- Active ingredient. The substance that does the medical work, usually printed on the box under the main name.
- Brand name. The trade name chosen by the company that first developed the medicine.
- Generic name. The official name of the active ingredient, used by every manufacturer.
- Inactive ingredients (excipients). Fillers, binders, coatings, colours and flavours that turn the active ingredient into a tablet, capsule or liquid.
- Bioequivalence. Evidence that a generic delivers the active ingredient into the bloodstream at a comparable rate and amount to the original.
Generic vs brand name: side by side
| Feature | Brand-name medicine | Generic medicine |
|---|---|---|
| Active ingredient | The original compound | The same compound at the same strength |
| How it is taken | Tablet, capsule, liquid and so on | The same route and form |
| Route to approval | Full development and clinical testing | Must show equivalence to the original |
| Inactive ingredients | Chosen by the original maker | May be different |
| Appearance | A familiar colour and shape | Often a different colour, shape or marking |
| Price | Usually higher | Usually lower |
Why generics usually cost less
The company that develops a new medicine carries the cost of discovering and testing it and is normally protected by patents for a period. Once those protections end, other manufacturers can produce the same active ingredient without repeating the whole development programme, and competition tends to push prices down. The lower price reflects how the medicine reached the market, not a lower standard of production; generic manufacturers are inspected and regulated as well.
Are generic drugs the same as brand name?
For the active ingredient, yes. For everything else, not always, and that matters in a few situations:
- Allergies and intolerances. A different filler or colouring can matter if you react to lactose, gluten, certain dyes or other excipients. The patient leaflet lists them.
- Medicines with a narrow margin. For a small group of medicines, very small differences in blood levels can matter, and prescribers sometimes ask for the same manufacturer to be supplied each time. Your pharmacist knows which medicines fall into this group.
- Slow-release products. Different modified-release designs can behave slightly differently, so a switch may need checking.
- Confusion over new-looking tablets. When the colour or shape changes between supplies, people sometimes worry they have been given the wrong medicine, or take two by mistake.
What to do when your tablets look different
- Check the label: is your name on it, and do the active ingredient and strength match your last supply? Our guide on how to read a prescription label shows where to look.
- Compare the tablets with the description in the patient leaflet.
- If anything still seems wrong, ask the pharmacist before taking a dose. It is a common question and a quick one to answer.
- If you notice new side effects after a switch, report them to your pharmacist or prescriber.
Common myths
- "Generics are weaker." The active ingredient and strength have to match the original.
- "The brand works faster." Equivalence testing exists to check exactly this.
- "A different colour means a different medicine." Not necessarily; generics are often deliberately made to look different from the original.
- "Cheaper means carelessly made." Manufacturers of both kinds face quality inspections.
Questions to ask at the pharmacy
- Is there a generic version of this medicine, and would it suit me?
- Does this version contain anything I have reacted to before?
- Is this a medicine where staying with one manufacturer is recommended?
- Why does this supply look different from last time?
Pharmacies often explain these choices on posters and screens near the counter, as our piece on digital signage in pharmacies describes. If you are moving your prescriptions elsewhere, our guide to transferring a prescription covers the steps, and a change of pharmacy is a common moment for tablets to arrive looking different.
Prescribing rules, substitution rules and costs vary between countries and between insurance plans, so your pharmacist and prescriber are the right people to ask about your own medicines. Never switch, stop or combine medicines on your own.
One thing first
A guide, not a verdict
Our pages are good for understanding a topic and for writing down the questions you want to ask. They cannot tell you what is happening in your own mouth, lungs or body.
If anything here seems to clash with what your dentist, pharmacist or doctor has told you, their advice comes first.
The writers at Inside Schizophrenia
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