Question 1

How does sildenafil actually create an erection?

Accepted Answer

Sildenafil doesn't create erections directly. It enhances the natural process by blocking the PDE5 enzyme that normally breaks down cGMP. With more cGMP available, blood vessels in the penis relax more effectively when sexual stimulation releases nitric oxide.

Question 2

Why does sildenafil require sexual stimulation to work?

Accepted Answer

Sildenafil works by preserving cGMP, but cGMP is only produced when sexual stimulation triggers nitric oxide release. Without this natural trigger, there's no cGMP to preserve, so the medication has nothing to work with.

Question 3

How long does sildenafil stay active in the body?

Accepted Answer

Sildenafil has a 3-5 hour half-life, meaning most is eliminated within 12-24 hours. Effects typically last 4-6 hours, though this varies with dose, individual metabolism, and whether taken with food.

Question 4

Why is sildenafil dangerous with nitrate medications?

Accepted Answer

Both medications cause blood vessel relaxation through increased cGMP. Combined, they can cause severe, dangerous drops in blood pressure. This is why sildenafil is absolutely contraindicated with nitrates.

Question 5

Can sildenafil cure erectile dysfunction permanently?

Accepted Answer

No, sildenafil doesn't cure ED. It manages symptoms by enhancing natural physiology. Effects last only while the medication is active in your system. Underlying causes should be addressed with your doctor.