Final answer:
Viagra, or sildenafil, is a medication used to treat ED by increasing blood flow to the phallus, effectively aiding in achieving an erection. It is effective in about 70 to 85 percent but should be used with caution, especially by individuals with certain health conditions.
Step-by-step explanation:
Erectile dysfunction (ED) is a condition that affects a significant percentage of men, particularly as they age. Viagra®, known generically as sildenafil, plays a crucial role in the treatment of ED. Initially tested for heart-related conditions, sildenafil was found to have a profound effect on achieving and maintaining erections. Viagra® works by inhibiting phosphodiesterase 5 (PDE5), which is part of the vasodilation signaling pathway. This inhibition leads to increased blood flow to the phallus, which is essential for an erection. While Viagra® has proven to be effective in treating 70 to 85 percent of cases of ED, it is important for individuals, especially those with heart conditions or those taking nitrates, to consult their physician before using the drug due to potential risks.
- Viagra® increases blood flow to the phallus, facilitating erections.
- It is effective in the majority of ED cases but requires medical consultation.
- Alternative treatments are available if Viagra® is not suitable for the individual.