Before using careprost lash serum, contact lenses must be taken off. After stopping this drug, it can take a few weeks or months for the color of your eyelids to return to normal. The pigmented portion of the eye may permanently alter. On other skin locations that this drug comes into contact with on a regular basis, you can see hair growth.
In general, eyelash growth treatments are thought to be safe and effective in thickening eyelashes. However, be sure you are aware of the possible hazards if you have used over-the-counter eyelash growth treatments and are considering asking your doctor for a prescription.