Like a lot of medication. Viagra just like pricing is subjective.
It’s not a one stop for all cure or aid and similar to other medications, it has its side effects which will affect some people in different ways more than others.
I’ve had migraine, albeit not too bad. Also the sinus blockage but then again I suffer with that anyway.
I would guess the more natural herbal viagra might be the best to take to lessen side effects. But then again I doubt if it is as potent.
I read about the guy who after taking the lil blue pill, had an erection for a week.
He visited his local village pharmacy, run by two spinsters and asked what they could give him for it.
They said they had £1000 in the safe and he could have a share of the profits