Do headaches become less frequent with continued Viagra use?

How does Viagra work? ... Viagra relaxes the muscle cells in the blood vessels supplying the penis, allowing an increased blood flow. Erections occur when blood ... Feb 17, 2001 ... Here is why inhibition of the PDE has that effect: nitric oxide causes the production of a secondary signaling chemical, cyclic GMP, which leads ... Viagra acts as a relatively specific vasodilator of the penile circulation that enhances prolonged muscle relaxation/vasodilation by inhibiting the action of ... Viagra works to treat ED by helping you get and maintain an erection. The drug does this by improving blood flow into your penis when you're sexually aroused. Sildenafil (Pfizer Pharmaceuticals, Sandwich, Kent, UK) has been associated with pulmonary vasorelaxation. A more potent Sildenafil analogue (UK 343-664 ... Jun 7, 2024 ... The study employed cardiovascular physiology tests, ultrasound, and functional MRI scans to evaluate the drugs' effects. Key findings include:. Apr 17, 2008 ... Addition of sildenafil to yohimbine significantly enhanced the effect of the latter on intromission frequency, intercopulatory interval and the ... Sep 4, 2024 ... ... effect standpoint than the other. Some of the more common side effects of sildenafil / Viagra are: Headaches; Nausea; Flushing; Congestion ... Mar 26, 2022 ... We here present the case of a 32-year-old Iranian male, without a known psychiatric history, who developed psychotic symptoms following initiation of ... Since there is evidence that paradoxical sleep deprivation (PSD) elicits penile erection (PE) and ejaculation (EJ), and that the erectile.