Suggest Treatment For Erectile Dysfunction Caused After Having CABG

I m a 47 year old man. I underwent CABG in 2010. I have high blood pressure . I take dosage of Ecospirin-150, SelokenXL50, Olsar20 and Rosuvas10 on daily basis. My Blood - Sugar is yet below 120. My both parents were diabetic. I weigh around 90 Kg. My height is 165 cms. I do deskjob for living.

After CABG, my libido has decreased and I started experiencing Erectile Dysfunction. Now I hardly get any erections. My married life is in deep trouble . What medication should I take to restore my sexual desires and get proper erection. If I take Viagra , will it be harmful for me?
Can you suggest a suitable Sexologist in Western Suburbs of Mumbai. India