Question 1

Does Cialis work without sexual stimulation?

Accepted Answer

No. Cialis only works when you are sexually aroused. It enhances the natural response to stimulation, it does not create an automatic erection.

Question 2

How long does Cialis stay in your system?

Accepted Answer

The half‑life of tadalafil is about 17.5 hours, so it can be detected in the body for 5‑6 days. However, its clinical effect for erections lasts up to 36 hours.

Question 3

Can Cialis cause vision problems?

Accepted Answer

Very rarely. Because tadalafil is >900‑fold selective for PDE5 over PDE6 (retinal enzyme), colour‑tinged vision is much less common than with sildenafil. If you experience sudden vision loss, stop and seek urgent care.

Question 4

Why does Cialis cause back pain?

Accepted Answer

Back pain and muscle aches are thought to be related to mild inhibition of PDE11 in skeletal muscle. The effect is usually mild and temporary, often improving with continued use.

Question 5

Can I take Cialis with alcohol?

Accepted Answer

Moderate alcohol (1‑2 units) is generally safe. However, excessive drinking can impair erection and increase the risk of dizziness or low blood pressure. Avoid binge drinking.