D.W.
Here's the information from the website of the manufacturer:
http://latisse.com/FAQs.aspx?state=12
I'd call your optometrist or whichever physician you're thinking of asking a prescription from and ask the questions you have, risks, etc. I've not known anyone who has used it. Had my eyelashes not grown back in well after chemo, I'd likely be considering it, too.
You may also want to check with your insurance to see how they cover it - you can look it up on the online "formulary" or "preferred drug list" or ask your pharmacist to run a "dummy" script to see how much you'll have to pay out of your own pocket through your plan.
Good luck.