Tri previfem info?

I can help, but I need the exact meaning of “Tri previfem info.” Did you mean:

1) “Tri Previfem” (a brand/product name), and you want dosing/side effects/uses?
2) “Previfem” (the birth-control brand), and you want complete information?
3) “TRI” as in “Trizivir” or another medicine name?

If you tell me which medication (and the country, if you can), I’ll give a tight, accurate summary of what it’s for, how to take it, common side effects, warnings, and where to find official prescribing info.