The good news is that Few says he’s never seen Latisse permanently change skin pigment. “However, when a change has presented itself, it has typically been slight darkening of the skin right at the border of the eyelashes, where the skin meets the hair,” he says. Things should go back to normal once you stop using the product.
Unfortuantely, eye discoloration is a known (although very rare) risk and can be permanent if it happens in blue or light eyes, says Few. That’s caused by Latisse’s active ingredient, bimatoprost. Few says he’s never actually seen this happen to any of his patients—but you may want to consider skipping Latisse if you have a light eye hue just in case.
“There is a small risk of eye irritation,” says Few, who notes that it’s typically associated with those who have a tendency for dry eyes or wear contacts. If you’re using Latisse, he suggests keeping eye drops on hand so that your eye comfort won’t deteriorate while your lashes bloom.
Typically, it takes several weeks to start seeing eyelash growth by stimulating the hair growth cycle, says Few. While you may see eyelashes sprouting in as early as one month, the most dramatic change won’t be visible until three to four months after you’ve started using Latisse. Patience, chica!
It’s really important to not stop use when you first notice growth, says Few. The general rule of thumb: The time it takes to see the lashes grow is how long it takes to see the lashes go back to normal if you stop using the medication. So if you quit at the first sign of a fuller fringe, that won’t last. Yep: That means you need to continue using it if you like the results, says Few.
“The safety of this product has not been tested in pregnant women and therefore is not recommended in pregnancy,” says Few—especially since the benefits are purely cosmetic and not worth the risk of unknown birth side effects.
Considered everything and ready to try it? Obviously, you need a prescription from your doc (and according to RealSelf.com, the largest online cosmetic surgery community, the average price is $125 for a one-month supply). Once you’ve gotten that, here’s how to apply Latisse, says Few: Use the included sterile applicator to swipe the serum onto freshly washed lids. Just keep this in mind: Experts recommend avoiding getting the serum on lower lid, because you might get a little too much hair growth for lashes to look natural.