Does changing the medicines frequently will do better with P?

I'm having P from past 27 years. Especially it is severe from past 10 years.

I read somewhere that changing the medicines frequently will make the body not to get used to the same and so will have a better results. I generally shift the medicine from allopathy to ayurvedic to homeopathy, but never tried with a combination of these. 3 years back when I started taking homeopathic treatment it was so severe that in-between I moved to PUVA therapy. It has completely cleared my P in 4-5 weeks but later came up sharply after 3 months. At this time my homeopathic doctor told me not to go for any other medicine and it will come back with increased vengeance.

venky
http://www.venky-itjobs.blogspot.com

Share your experiences of the same if you have any better results with changing the treatment methods.