Are there any contraindications for taking Viagra?

Oct 21, 2024 ... Sildenafil works by blocking an enzyme in the body called PDE5, which helps relax certain blood vessels. For erectile dysfunction, it increases ... Oct 19, 2014 ... Dosages used for heart ailments are lower than those used for erectile dysfunction, and patients in the study showed few side effects. “ ... Nov 25, 2002 ... Phosphodiesterase (PDE)-5 degrades guanosine 3′,5′cyclic monophosphate (cGMP) and its inhibitor sildenafil citrate (Viagra) treats erectile ... Aug 14, 2019 ... Summary. Viagra is a useful form of treatment for erectile dysfunction. It is best to take the drug around 60 minutes before sexual activity, ... These drugs include sildenafil (Viagra) and tadalafil (Cialis). ... Although sildenafil had a modest anti-inflammatory effect, no protective effects were observed ... The significance of these effects in dogs and cats is unknown. This short-acting medication should stop working within 24 hours, although can last longer in ... Viagra doesn't make you horny or trigger sudden erections. Viagra doesn't have any noticeable impact on sex drive or general level of interest in sex. It also ... Nov 28, 2019 ... Viagra can cause changes in blood pressure for some men, and both high and low blood pressure are listed as uncommon side effects of taking Viagra. The most common side effects of VIAGRA: headache; flushing; upset stomach; abnormal vision, such as changes in color vision (such as having a blue color tinge) ... Research has shown that cocaine misuse can cause marked decreases in cerebral blood flow, particularly affecting the prefrontal cortex.