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Probe · tadalafil · 3 min read

How soon can Cialis 10-20 mg start to work?

Thirty-nine of 75 men on Cialis 20 mg reported a successful erection at or before 30 minutes in one 223-man stopwatch trial. On 10 mg the count was 28 of 74. Placebo was 26 of 74. This vault still starts as-needed use at 10 mg. A couple of hours remains ordinary counselling if the night matters.

Medically reviewed by Dr. Mateo Ruiz, MD - Clinical pharmacology, Barcelona

Last reviewed

Updated

01How did the 10 mg arm look at that same clock?

Forest-green still life: small analog timer at thirty and a pale tablet on teal stone

Twenty-eight of 74 men on 10 mg (38%) met the same 30-minute bar. This site's as-needed start is that 10 mg tablet. The 20 mg count sits on the step-up, not on the first swallow for most men.

If 10 mg felt empty at 20 minutes, the trial does not tell you to take a second tablet. Usual frequency is one as-needed dose per day.

02Does stimulation still matter at 30 minutes?

Stimulation still has to be there. Tadalafil does not start an erection on its own at 30 minutes or at two hours. Plasma is not rigidity.

Read Cialis still needs stimulation if the tablet sat unused on the nightstand.

03Why does counselling still talk about two hours?

Peak plasma after a swallowed tablet sits near two hours. Some men notice help from 30 minutes. Some wait closer to six. The stopwatch row is weaker evidence than the longer counselling window.

Food does not hold the swallow. See rate and extent unmoved.

04What does 39 of 75 at 30 minutes mean?

Thirty-nine of 75 men assigned Cialis 20 mg met the 30-minute bar in that stopwatch trial (52%). A successful erection meant at least 1 erection in 4 attempts that led to successful intercourse. The clock started at the swallow.

That count is one assigned strength in one program. It is not a promise that every 10 mg Friday starts in half an hour.

05How was the 223-man stopwatch built?

Two hundred twenty-three men sat in a randomized, placebo-controlled, double-blind stopwatch trial. Arms were placebo, Cialis 10 mg, and Cialis 20 mg. Men used a stopwatch and recorded the time after the dose when they first had a successful erection.

The definition sat on intercourse, not on a feeling of warmth. Sexual stimulation still had to be there.

06Did placebo move anyone at 30 minutes?

Twenty-six of 74 men on placebo (35%) also met the 30-minute bar. Early onset on 10 mg sat close to that placebo count. That is why this page A 30-minute guarantee on the starting tablet is not in that row.

Plan a couple of hours if the night matters. The tail after that hour is a different question. See the 483-man 24-hour clock.

Sources

  1. DailyMed CIALIS (tadalafil) Clinical Studies, onset / stopwatch (N=223): 26/74, 28/74, 39/75 at 30 minutes

Checked against the current label and reviewed by Dr. Mateo Ruiz. See Probe, Assay, Glow-check, Seal.

Vault consult

Answers follow the U.S. Cialis label.

Blanca V. If 10 mg did nothing at 20 minutes, do I take another?

Vault reply

No. Usual as-needed frequency is one tablet a day. Twenty minutes is early against a peak near two hours. The 10 mg arm in the 223-man stopwatch was 28 of 74 at 30 minutes.

Ferran L. Is 39 of 75 the 10 mg number?

Vault reply

Thirty-nine of 75 was the 20 mg arm. The 10 mg arm was 28 of 74. This vault starts as-needed use at 10 mg.

Aisha K. Did placebo also hit 30 minutes?

Vault reply

Twenty-six of 74 men on placebo met the same bar. That is why a 30-minute story on 10 mg is a weak promise.

Before you start, stop, or change any medicine, speak with your prescriber or pharmacist - they hold your chart, this vault card does not. Open the vault disclaimer.