Helping my dad

Hi all, I'm new here but hope that chatting with others in the same boat as my dad may give him a little hope. He's had psoriasis very badly for three years, had two UV treatments lasting several months after years and years of creams, ointments, moisturisers etc. he's now taking Cyclosporine which initially had a fantastic effect on his skin, however the side effects are brutal. He's in his seventies and this has pretty much stopped his life. He's very depressed and both my parents are exhausted. I'm trying to be the voice of reason but I'm really worried about him. They have reduced his dosage and he is due back at the hospital in ten days or so. He's off his food, too tired to go on his daily walks, shaking terribly and having severe shivering fits, as well as having problems going to the loo. Is this just the side effects? Sorry to go on, I just so want to help him :-(