To see which one works best.

They all cause headaches, but Levitra, for me, is the mildest headache.  It also works faster, makes me harder,  and usually is good for two or three pops within an hour or two.

Viagra gives me a full blown headache,  takes about an hour to kick in, and is only good for one pop.

Cialis didn't do a damned thing for me except give me a headache that didn’t go away until the next day.  

One thing to keep in mind is that you can play with the strength a little.   For example,  if I'm doing an AMP or a short, one pop session,  I'll take half a pill and it's more than sufficient with the added benefit of no headache.   But if I'm anticipating MSOG and an amorous session,  I'll take a whole pill.

Again,  everyone is different and the ED reasons are varied.  Mine was caused by a pituitary tumor and the resulting surgery.   Others have high blood pressure,  circulatory issues, geezeritis, etc...., and each condition responds differently.  

The positive aspect of trying each medication is that each experiment requires a sexual encounter,  so it's a win-win.  

I think when I come to town you should take one on Monday and we'll play ,and then one on Friday and will try that one out to anybody else that wants to try any of those self indulging extras. you take it and I'll be the receiver

Viagra is much better for me. Cialis has something in it that I'm mildly allergic to. Half a viagra for recreational use does the trick.

I have perfected the art of ED drugs

I have done all of the above including STYAN (sp) witch is a melt away form of levtra,but it works in 10 minutes.What I do now is buy 5mg cialis and take 2 pills about 3 -4 hrs before take off. It builds up in your system and gives you no headache.If I'm seeing someone that I really need to get ready for I take 2,4 hrs before then 1 a hr before. If I'm spending the night I take one before bed and wake up with a  screaming hard on. Also 5 mg cost $5 each without insurance and 20mg are now about $42 each.WTF 20 years ago I paid $25 for a blowjob now I pay $42 for a free one.

I can't take it 30-60 minutes before sex or I will lose sensitivity. The 100mg version of Viagra is too much for me.  I  cut in half or take the  50mg 3-4 hours before and it still works.  

 I use Cialis because it lasts longer. I don't know if it's a time release version???  I can still feel effects the next day with a 20 mg dose. So sometimes I can take it the night before.

 
I do get a headache or lower back pain as a side effect from both.