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Protect a man or his partner from sexually transmitted diseases, including HIV. Speak to your doctor about ways to guard against sexually transmitted diseases.If you have a low sex drive, or if you have had a previous head injury, ED may be due to a hormonal problem. In this situation a blood test to check the level of the hormone testosterone (and sometimes prolactin) may be advised. tadalafil canada Cardiovascular: palpitation, tachycardia, angina pectoris, myocardial infarction, ventricular tachyarrhythmias, hypotensionvardenafil hydrochloride tablet, film coated

Metabolism and Excretion: Sildenafil is cleared predominantly by the CYP3A4 (major route) and CYP2C9 (minor route) hepatic microsomal isoenzymes. The major circulating metabolite results from N-desmethylation of sildenafil, and is itself further metabolized. This metabolite has a PDE selectivity profile similar to sildenafil and an in vitro potency for PDE5 approximately 50% of the parent drug. Plasma concentrations of this metabolite are approximately 40% of those seen for sildenafil, so that the metabolite accounts for about 20% of sildenafil's pharmacologic effects.

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There have been rare reports of prolonged erections greater than 4 hours and priapism (painful erections greater than 6 hours in duration) for this class of compounds. Priapism, if not treated promptly, can result in irreversible damage to the erectile tissue. Patients who have an erection lasting greater than 4 hours, whether painful or not, should seek emergency medical attention.Tadalafil works by preventing the action of a chemical in your body, called phosphodiesterase type-5. This helps to relax (widen) blood vessels and improves the flow of blood to the penis following sexual stimulation. This helps to maintain an erection. viagra 100 mg split in half

"red eye" due to swollen blood vessels in the white part of the eye and in the eyelids.

Another statistic wielded by the campaigns - the claim that 43% of American women have a sexual dysfunction - has also come under fire. The figure is drawn from a contentious 1994 survey that gave its female respondents the option of answering yes or no to whether they had any sort of sexual problem, but the survey did not collect any data on what the nature of the problem was - even the senior author of that study has reportedly claimed the statistic is misused. where to get cialis Tadalafil relaja los músculos de los vasos sanguíneos y aumenta el flujo de sangre a regiones particulares del cuerpo.

Men who have had a heart attack or stroke within the past 6 months and those with certain medical conditions (e.g., uncontrolled high blood pressure, severe low blood pressure or liver disease, unstable angina) that make sexual activity inadvisable should not take Cialis. Dosages of the drug should be limited in patients with kidney or liver disorders.