Tretinoin causes surface drying and sun sensitivity only. It wil not effect internal organs. Theoretically it should not be used in a pregnant woman but it's absorption is minimal.
Topical Retin-A (generic name: tretinoin) has not been shown to cause hair loss, and has in fact been shown in some studies to help with hair growth when applied directly to the scalp in combination with other medications such as Rogaine. But there is no evidence to suggest that facial...
