Why does Fildena sometimes cause headaches?
Fildena, which contains sildenafil citrate (similar to Viagra), can cause headaches as a side effect due to its mechanism of action. Fildena works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), leading to increased blood flow to the penis, but it also affects other blood vessels in the body, including those in the brain. This can cause dilation of blood vessels, leading to an increase in blood flow, which can result in headaches.