Re: how much Retin-a Micro should I use?
One 45 gram tube will last me 6 to 8 weeks.
So you have about 9 to 10 months supply. It should be no problem for them to call in to your pharmacy an extra tube or two by the time you begin to run out.
Another point - I use Retin-A once a day. I don't slather it on either, "5 peas" for the whole face.
If you can't decide what a "pea" size is, go to your frozen food section and buy some frozen peas.