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Retrieved 25 October Retrieved 30 April Retrieved 13 June There are also mouth spray preparations of sildenafil for faster onset of action.
Retrieved 9 February Protease inhibitors inhibit the metabolism of sildenafil, effectively multiplying the plasma levels of sildenafil, increasing the incidence and severity of side effects.
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Rare but serious adverse effects found through postmarketing surveillance include prolonged erections , severe low blood pressure , myocardial infarction heart attack , ventricular arrhythmias , stroke , increased intraocular pressure , and sudden hearing loss.
In turn, they believe it will enhance their performances. Our clinicians regularly offer patients the opportunity to take part in trials of new drugs and treatments. Drugs for erectile dysfunction and premature ejaculation.
Retrieved 26 December The American Journal of Cardiology. Morriston Hospital in Swansea, was the first in the world to trial Viagra!
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Retrieved 4 May