Bimat (bimatoprost) is a prescription medicine often used as an eye drop for glaucoma and, at lower strengths, to grow eyelashes. In the UK you'll see it under brand names like Lumigan (glaucoma) and in cosmetic clinics for eyelash treatment. It's powerful and works differently than simple serums, so you need to treat it like any other prescription drug — know the benefits and the risks before you use it.
For glaucoma, bimatoprost lowers eye pressure and can prevent damage to the optic nerve. For lashes, a small nightly dose at the base of the upper eyelid can lengthen, darken, and thicken lashes over a few weeks. Results usually show after 6–12 weeks and improve up to 4 months. Importantly, the cosmetic effect stops when you stop using the product.
Common side effects include eye redness, itching, and dry eyes. There’s also a risk of permanent darkening of the iris or eyelid skin with long-term use — that’s rare but serious. If you wear contact lenses, remove them before applying and wait at least 15 minutes to put them back in. Avoid getting it in the other eye or on broken skin.
Don’t mix bimat with other eye medicines without checking with a clinician. If you have eye infections, recent eye surgery, or severe eye irritation, tell your doctor before starting. If you notice sudden vision changes, intense eye pain, or severe swelling, stop use and seek medical help right away.
Because bimat can affect pigmentation and eye health, always use the exact dose your prescriber gave you. Never apply more often or in larger amounts thinking it will speed results — that raises your chance of side effects without improving outcomes.
Bimatoprost is prescription-only in the UK. That means legitimate pharmacies will ask for a prescription. If a site sells it without one, don’t buy from them. Look for MHRA registration or a visible pharmacy registration number on UK sites. Prefer pharmacies that require a consultation or prescription upload and offer clear contact details.
If you’re ordering from abroad, be cautious: import rules and product quality vary. Fake or incorrectly formulated products can harm your eyes. When in doubt, see an optometrist or your GP — they can prescribe the right product or recommend safe alternatives.
Want to try eyelash treatments but worried about side effects? Ask about non-prescription serums, makeup options, or professional lash extensions. If your main concern is glaucoma or eye pressure, book a proper eye exam — untreated high pressure can cause permanent vision loss.
Short and practical: treat bimat as a prescription medicine, follow the simple safety steps, and buy only from trusted UK-registered sources. That keeps your eyes safer and gives you the best chance of a good result.
Bimat is a popular eye and eyelash medication. Find out how—and where—you can buy Bimat online safely in 2025. Tips, facts, red flags, and UK laws inside.