Blue Viagra contains Sildenafil, a medication belonging to the phosphodiesterase type 5 (PDE5) inhibitor class. It helps men with erectile dysfunction achieve and maintain an erection by increasing blood flow to the penis during sexual stimulation. Sildenafil works by preventing the breakdown of cyclic guanosine monophosphate (cGMP), which helps relax the smooth muscles in penile blood vessels and supports a natural erectile response.

Blue Viagra pills usually starts working within 30–60 minutes, although the timing may vary from person to person. Its effects can last for around four hours, but this does not mean an erection will remain for that entire period. Sexual arousal is still necessary for it to work. Sildenafil is also used in specific formulations to treat pulmonary arterial hypertension, but its use for this condition 100mg from its use for erectile dysfunction. Although some men may notice improvements in sexual confidence and erectile performance, results vary, and Sildenafil does not guarantee multiple rounds of intercourse or a shorter recovery period between erections. For safe and effective use, men should follow their doctor's dosage instructions and avoid combining Sildenafil with nitrate medications.