Hi Karen--
My dermatologist told me (after the fact)that if you take ampicillin and then stop, after 7 days you are still FOUR times more sensitive to sun exposure than you normally are. SPF 160 anyone?
As I rarely have the need to wear foundation, I cannot answer your question.
Seriously everyone, just check out your meds with your MD before you go sit in the sun.
Masaki and Amanda is this right?
Bill