Thanks, NicLiq. I didn't know about Nicotinamide and I have found some articles online. I will talk to my doctor about it. The name can be different in Spanish, and it can be called differently in my country. I live in the Dominican Republic. I found an article that says that it is used with calcipotriene (as used in Dovonex). Both medicines can be taken at the same time, I guess. Thanks for your helpful reply. Thanks in Christ Jesus. Orly