It is recommended to use Rogaine and Propecia simultaneously. Most experts believe that their combined effect is greater than the sum of their parts. Alpecin shampoo, in my opinion, is not likely to have an affect either way. It will not harm the effects of minoxidil and finasteride but I doubt it will do much for your hair loss.

Most patients will combine Nizoral with these drugs. Together they are known as "The Big Three".

Best of luck!

David