Why not go to your doctor? Depending on how quickly you can get an appointment it could be the fastest source. And they have free samples...

if you are able to get an erection for a while, then ED may not be your problem.

By telling your exact symptoms to the doctor, he or she may be able to give you better care.

If you are like me, getting an erection is not the problem, it's getting the next one in time to keep a really active gal happy.  To that end, a tantrika is better able to help me by allowing me to last longer in the first place.

Other suggestions are to be in the best physical shape you can be in by eating and exercising well, and also getting plenty of rest and hydration.

Either way, I'm glad for your good fortune

If you cannot get the viagra in time, be sure to hydrate and take a cockring with you.

Not sure you know how viagra works.  It is not an aphrodisiac.  Just allows blood back in the penis if everything else is biochemically ready.  Does not accelerate msog.  Maybe some psychological placebo effect.  

I would not take viagra the first time when I was facing a big performance expectation.  Find out what works for me.  Also the dosage varies.  And a large dose doesn't necessarily mean better performance.  Find a doctor you can talk to.  Doctors could care less about what your motivations are.  If your current doctor is your brother-in-law you really need a new doctor.

I tried redlightpharma and mymedsbuy with success.  If you have a  SO, just know you'll have to sign for them.  also, redlightpharma has a sticker in the 'sender' part of the box that says "Generic Med." So not good if you have a suspicious SO.

I used a credit card for both.  The only two that I know of right now that take credit cards and don't require a prescription.

Seriously?! There are a jillion doctors out there. See one in the next town. Pay cash.