Latisse is an ophthalmic solution containing the active ingredient bimatoprost. Its manufacturer Allergan originally produced bimatoprost as the brand Lumigan for treating glaucoma. This product turned out to have a positive side effect, as it also increased eyelash growth. Users developed longer and thicker eyelashes. Allergan later introduced this product under the brand Latisse, specifically for eyelashes. Latisse.com notes that the formula is the same, but the instructions are different; Lumigan drops are placed in the eyes, while Latisse is applied on the upper eyelid directly above the lashes. Both are available by prescription only. Bimatoprost is associated with some side effects other than extra eyelash growth.
Side Effects
About 4 percent of people who use Latisse experience eye itching or redness, according to the Latisse official website. Less common effects may include eye dryness, eye or eyelid discharge, severe or persistent eye fatigue, vision changes, as well as eyelid redness, inflammation, pain, burning or swelling.
Drugs.com recommends consulting your doctor if you experience any of these effects, as they may indicate an allergy to the product.
Skin Darkening
Some people experience darkening of the eyelid skin while using Latisse. This side effect is usually reversible once you stop using the product, but the discoloration could be permanent, warns Drugs.com.
Other Hair Growth
Because Latisse promotes hair growth, you might experience hair growth in other areas that Latisse repeatedly touches. Latisse.com advises blotting away any excess solution outside the upper eyelid with a tissue. You apply the product before bedtime, but sometimes Latisse gets onto the lower eyelids during sleep. This could cause longer and thicker lower lashes, which is not an effect everyone likes.
Increased Eye Pigmentation
Although unlikely unless Latisse is placed in the eye, bimatoprost can cause increased brown pigmentation of the iris, the colored part of the eye. Blue, green and hazel eyes can take on a brown hue, and brown eyes can become darker. This change in color is usually permanent, according to the Latisse website. Users are instructed not to put Latisse into the eyes.
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