Viagra et al - aren't they great??

[Abracadabra]

Bro, on an empty stomach, it takes effect within 30 mins. No need to wait 1.5hrs.

Totally concur with the empty stomach approach when taking viagra to ensure full uptake.

Recently though, 2 or 3 times, I have had a double shot cappuccino just after taking a viagra with water 1 hour prior to a punt and have noticed a comparative reduction in its effectiveness. Could be circumstantial with a bunch of other factors at play like lousy sleep lately, some fitness drop off..

Any thoughts, experiences re coffee and viagra GFishman?