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<br><br><br>Our Viagra Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication. Alternatively,&nbsp;men can also now access advice and prescription-only medicines to treat ED discreetly and conveniently, without a trip to their GP, via the Boots Online Doctor’s Erectile Dysfunction Treatment service. Viagra inhibits an enzyme called phosphodiesterase-5 (PDE5) which destroys the cGMP. Thus, Viagra prevents the destruction of cGMP and allows cGMP to accumulate and persist longer. The longer cGMP persists, the more prolonged the engorgement of the penis.<br>Related Conditions<br>Most men occasionally fail to get or keep an erection from time to time, usually caused by stress, tiredness, anxiety or drinking too much alcohol. Erectile problems can also be due to conditions like cardiovascular disease, high blood pressure and diabetes. Take it as your healthcare provider recommends, which is usually between 30 minutes to four hours before planned sexual activity. Some other medicines may alter the blood levels of sildenafil.<br>What should I tell my care team before I take this medication?<br>Co-administration of erythromycin, a moderate CYP3A4 inhibitor, resulted in 160% and 182% increases in sildenafil C and AUC, respectively. Co-administration of saquinavir, a strong CYP3A4 inhibitor, resulted in 140% and 210% increases in sildenafil C and AUC, respectively. Stronger CYP3A4 inhibitors such as ketoconazole or itraconazole could be expected to have greater effects than seen with saquinavir. A starting dose of 25 mg of VIAGRA should be considered in patients taking erythromycin or strong CYP3A4 inhibitors (such as saquinavir, ketoconazole, itraconazole) [see DOSAGE AND ADMINISTRATION, CLINICAL PHARMACOLOGY]. In fixed-dose studies, the incidence of some adverse reactions increased with dose. The type of adverse reactions in flexible-dose studies, which reflect the recommended dosage regimen, was similar to that for fixed-dose studies.<br>Sildenafil can be used as early as 4 hours before sex and as late as 30 minutes before sex. However, it is recommended to use this drug within an hour before sex. Sildenafil is available over the counter at Boots outlets, increasing access of the drug to men with erectile dysfunction. It is important to see a doctor following [https://www.business-opportunities.biz/?s=consistent%20signs consistent signs] of erectile dysfunction. Several other drugs have a similar effect to Viagra, such as Cialis or Levitra. If a person is not in a state of arousal, Viagra will not be able to cause an erection.<br>ADVERSE REACTIONS<br>Yes, you need a prescription for Levitra (Vardenafil), a drug used to treat erectile dysfunction. Before prescribing Levitra or comparable drugs, a doctor or urologist will assess your health and  [https://www.thegameroom.org/circle-of-death/ BUY XANAX WITHOUT PRESCRITION] medical background to ensure they are safe and effective. You can get a Vardenafil prescription online by consulting  with Your Doctors Online.<br><br>