Using Nioxin with Rogaine

I am trying to get an unbiased opinion on whether or not I can use Nioxin and Rogaine at the same time. Of course, each company is telling me to use their product, but neither will tell me if using both together is ok! Please help! I don’t know what to do! Thanks!

Nioxin is a shampoo / hair / beauty product. It does not grow hair. Rogaine is a medication that is applied directly to the scalp and absorbed through the skin of the scalp. Nioxin does not contain the medication minoxidil (the active ingredient in Rogaine), so I don’t see why you cannot use both. I don’t understand why one would tell you to not use the other.