Advancing age is the most common reason why men cannot sustain erections the way they used to earlier.It is extremely unlikely that a man at 62 years of age will be able to have an erection the way he would have had at 21. As a matter of fact, your physician advised you correctly in the sense Viagra is a good choice for patients with this problem, and there is no valid reason why your husband should say no unless he has some severe heart problem or a visual impairment which could get worse with use of such a medicine. the side-effect profile is perfectly acceptable, and there is every chance he will find it useful like million others all across the globe. There are sister molecules of Viagra like Cialis in case your husband wants to avoid Viagra, which have fewer side-effects as well. The reason I am stressing these is that there are other molecules like Apomorphine which have been claimed to help men achieve erections which are just not that effective, and also can cause nausea, or worse such a severe sedation that your hubby might just drop off to sleep rather than take interest in making love. Let him read this, and if you have issues to discuss, i will be glad to help you.