How Latisse Works:
Latisse is believed to work by increasing the growth (anagen) phase of the eyelash  cycle, meaning lashes grow for a longer period.  
It also increases the number of eyelash hairs in this growth phase, resulting in more eyelashes.
This leads to eyelashes that are thicker, longer and darker.
The exact mechanism of action is not fully understood.
How to Use Latisse:
Latisse solution is applied once daily typically in the evening, to the base of the upper eyelashes only.
It should be applied to clean, dry skin as if you were applying liquid eyeliner.
Sterile, single-use applicators are provided to prevent contamination. Use a new applicator for each eye.  
Do not apply to the lower eyelid or directly into the eye.  
Remove contact lenses before application and wait 15 minutes before reinserting them.  
Blot any excess solution that runs off the eyelid margin.
Consistency is key for optimal results.  
Results:
Results are gradual. Many users may start to see changes as early as 4-8 weeks
Full results are typically seen after 12-16 weeks of consistent daily use.  
If you stop using Latisse, your eyelashes will gradually return to their previous appearance over several weeks or months.  
Individual results may vary in terms of length, thickness, darkness, and the number of eyelashes.  
Side Effects:
Common side effects are usually mild and occur at the application site:
Pruritis(itching)
Redness of the eye (conjunctival hyperemia)  
Darkening of the eyelid skin (hyperpigmentation) - This may be reversible after stopping use.  
Dry eye symptoms
Eye irritation
Feeling like something is in the eye
Less common but more serious potential side effects include:
Darkening of the iris (colored part of the eye) - This change is likely permanent.
Abnormal hair growth in areas where the Latisse solution frequently touches the skin.  
Decreased pressure inside the eye (intraocular pressure) - While this was the original intended effect for glaucoma, it's important to monitor, especially if you have pre-existing eye pressure issues.  
Eye infection (if applicators are not used properly).  
Other eye problems like swelling, discharge, vision changes, or increased light sensitivity.  
Allergic reactions (rare but serious).  
Important Warnings:
Only use Latisse under the supervision of a healthcare professional.
Inform your doctor about any existing eye conditions, allergies, or medications you are taking.
Be aware of the potential for increased brown iris pigmentation, which is likely permanent.  
Avoid getting the solution into your eye or onto the lower lid.  
Use the provided sterile applicators only once.
If you develop any new eye problems or reactions, contact your doctor immediately.
Latisse may cause darkening of the eyelid skin, which may be reversible.  
Hair growth may occur in other skin areas if the product comes into repeated contact.  
Latisse vs. Over-the-Counter Eyelash Serums:
Latisse is the only FDA-approved prescription treatment for inadequate eyelashes.  
Over-the-counter eyelash serums contain different ingredients and are not subject to the same rigorous testing and approval process as prescription medications. While some may show results, their effectiveness and safety may vary