Cialis, Levitra (Vardenafil) and Viagra™ (Sildenafil) work by selectively inhibiting an enzyme in the penis called Phosphodiesterase V (PDE V), a chemical that takes away the erection. By blocking PDE V temporarily, these medications empower the chemical, Nitric Oxide (NO) that occurs naturally with arousal to initiate, produce and maintain an erection. Patients need sexual stimulation and foreplay to release NO initiate an erection in order for these medications to be effective. This class of medication is a safe and effective oral treatment for men with erectile dysfunction of physical, psychological or mixed cause. However, it is important that patients should be aware of the low probability (less than 50%) that intercourse will be possible after the first dose - particularly in severe or advanced cases and especially when using Viagra or Levitra. The majority of men who stop Viagra because of apparent lack of effect will in fact respond and achieve intercourse if they continue to try again, progress from 50 mg to 100 mg, or take the pill without food on an empty stomach (3 hours after eating). Taking Viagra or Levitra on a full stomach will not only reduce their peak concentration in the body by 30 to 50% but in addition will delay their peak concentration by one hour. In other words one may have to wait after intake before initiating sexual activity. MECALEXO is a Montreal based innovative solutions maker working with industries like yours to develop out of the ordinary products. We provide mechanical and electronic design to bring your ideas to life ! Where to buy obagi tretinoin cream 0.1 Generic viagra price comparison Doxycycline delayed release tablets After Oct 2018 generic manufacturers will sell vardenafil generic Levitra at a lower cost than branded Levitra. Dr Fox provides ED treatment from 82p/tablet. 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The result was total non-performance in bed one hour later! Then an hour later we had sex again and again in the morning! But all this while I'm only semi-hard, not stiff enough to penetrate. When he came he screamed and said it was the most intense orgasm of his entire life. I still have the sexual urge, manipulation still feels good, and I can still ejaculate. For the first time in many years I had two orgasms during sex. I disagree that sexual thoughts only are needed to obtain an erection, with both pills even after sex I tend to be in a semi primed state ready to go again & again, Its like being a 17 year old again, if you haven't tried either yet don't delay, life's shorter than you think. Back in the Saddle Again My problem is a lessening of the physical erection. 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