If I could give you 1 piece of advice it would be avoid this stuff at all cost.they claim there are no side effects, let me tell you what no side effects really means, #1 headaches for days on end, #2 extreme vertigo, #3 severe muscle and joint soreness, #4 extremely high heart rate,.#5 intense nausea, #6 severe breathing complications, this pill should be taken off the market. I took 1 pill just to try something different with my girlfriend, and it did work and do what it said its supposed to, but the side-effects lasted over a week.  It got so bad with the vertigo I missed work because I could not stand up without almost passing out. I would never let anyone I know take this pill and I guarantee that I will never take this product again, It's dangerous, my heart rate was over 130 for 3 days even when I was just laying on the couch.this is not a safe product do yourself a favor and do not use it.
 

Bought the 1750 pill at a local sex shop. I\'d say my normal libido and performance are below average in general, and... Holy hell.  Kicked in around 20 minutes with major flushing and stuffed sinuses (like cialis). Sitting on the couch for the next hour or so, I got a major erection which soon chilled out and gave way to a steady dribble of pre-cum.  Was planning on watching a porn but that didn\'t happen. The stuff gave me diarrhea, so I went to relieve myself. Saw my Fleshlight and got a bright idea...

Ended up in bed with it and an amazing hard on.  It was a very steady, really intensely pleasurable experience, warm all over and aggressive. I had a huge orgasm in 30min or so that even felt like it continued a few seconds longer than normal.  Stayed hard through the clean-up and went back to playing PS4. About 2hrs into it, got hit with a wave of anxiety... Felt like a mini panic attack. Calmed myself down.  Started noticing the muscles in my jaws tensing up as well as the back of my neck. I sat with these waves of anxiety for a bit, then decided to walk around a bit.

That lead to another masturbation session, even stronger orgasm (I never go more than once in a day).  Started getting the chills so put on a coat. Sat on the couch bouncing my legs constantly because if felt like it relieved the anxiety.  Had to get up again and walk around, got some hot water to sip on, sat back down. The anxiety/jittery waves lasted about 4 hours and I\'m just now starting to wind down.  Was getting worried for a minute. This was all with zero alcohol and took it with food (won\'t do that next time; mild queasiness).

Assuming this crap stops here shortly, I\'ll try to go to bed but I\'m pretty wired.  Wondering if there\'s speed in this stuff... Reminds me of the come-down from ecstasy, but not as sick feeling. If I do this again, it\'ll definitely be half like the previous reviewer said.  Stuff is crazy strong. Most definitely amps desire and erection strength and orgasm strength and ejaculate amount in big way, but this anxiety stuff is for the dogs.  No headaches other that a slightly dull pressure.

I tried the 1500mg version on recommendation from clerk at the store, due to my 165lb size. I had been having ED recently from taking antidepressants.  Pill was taken 45 minutes before sex and it worked like a charm. Like other reviews I awoke every morning with very firm erections for 5-6 days, and had them throughout the day.  My only complaint is despite the "no headache" label, I had severe headache later than night and normal headaches the next three. Also disturbed sleep.  Next time I bought a 1750mg and opened it to take half (875mg) each time. Still worked and no headaches.  I would recommend the product.

I took one more knight. I had a headache so bad for two days, I never got chance to have sex.  I had several errection but my headache made me didn't want to have sex.

Works great but the migraines headache for day is not worth it at all!! Buyer beware!