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Probe · tadalafil · 3 min read

What if an erection lasts more than 4 hours on Cialis?

Emergency care. An erection lasting more than 4 hours after Cialis, painful or not, needs a same-day exam. Rare reports exist of erections lasting greater than 4 hours and priapism greater than 6 hours for this class. The 17.5-hour half-life is leftover exposure, not a locked erection. Sexual stimulation is still required to start one.

Last reviewed

Updated

01Who sits on the priapism caution list?

Forest-green still life: red caution thread around a four-hour sand glass

Sickle cell anemia, multiple myeloma, leukemia, and anatomical deformation of the penis such as angulation, cavernosal fibrosis, or Peyronie's disease sit on that caution. The list is on the label before anyone prices thirty 10 mg tablets.

A clean list does not make a four-hour erection safe to watch at home.

02What if an erection lasts more than 4 hours on Cialis?

Go to emergency care. The label does not ask you to wait out a four-hour erection at home. Painful or not, the clock is four hours.

This is not a feature of the long tail. Easier second attempts are not the same as a locked erection.

03Is a four-hour erection the 36-hour window?

No. Highlights say the tablet can help up to 36 hours. That is a response window that still needs stimulation. It is not a four-hour erection left in place.

Men describe easier second attempts, not a locked erection. See stimulation and the weekend pulse.

04What does the class language say about 6 hours?

Rare reports exist of erections lasting greater than 4 hours and priapism (painful erections greater than 6 hours in duration) for this class of compounds. Priapism can result in penile tissue damage and permanent loss of potency if not treated promptly.

Use Cialis with caution in men with conditions that may predispose them to priapism.

05Do I keep taking 10 mg after a four-hour event?

Stop and get care first. Restart is a clinic decision after the event is treated. This inbox will not clear a restart by email.

Sudden one-eye vision loss or sudden hearing loss is also same-day care. Those stops are not this four-hour clock, but they share the same 'do not wait' rule.

06Will another PDE5 rescue a fading erection?

Another PDE5 the same day is not a rescue. Usual as-needed frequency is one tadalafil tablet in 24 hours. Stacking a second INN is off the plan.

If the erection will not go down, that is emergency care, not a second swallow.

Sources

  1. DailyMed CIALIS (tadalafil) Warnings and Precautions 5.3: prolonged erection and priapism
  2. CIALIS Medication Guide: erection lasting more than 4 hours

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.

Anna B. Three hours and fading - is that the emergency line?

Vault reply

The labelled emergency clock is greater than 4 hours. If it is still up and climbing toward that mark, do not wait for email. Painful or not.

Vicenc R. I have Peyronie's. Is 10 mg off the table?

Vault reply

Anatomical deformation including Peyronie's sits on the caution list. The writer has to see that before 10 mg as needed is a plan. A four-hour erection is still emergency care.

Leila S. Does the long half-life mean I stay erect?

Vault reply

No. Half-life near 17.5 hours keeps exposure around. An erection still needs stimulation. A locked erection past 4 hours is an emergency.

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.