If you already took 22 mg
Taking an unfamiliar amount can be unsettling. It does not automatically mean a life-threatening reaction will occur, but feeling well immediately afterward is not enough to rule out a problem.
The most useful next step is to establish what was taken, when, and with what else. Poison Control can assess a possible medication error without requiring you to decide whether it qualifies as an “overdose.”
What to do when you have no emergency symptoms
If you took more than prescribed, accidentally repeated a dose, or cannot verify the product’s ingredients, call Poison Control at 1-800-222-1222. If you followed a prescription but are concerned about an unusual strength, contact the prescribing clinician or dispensing pharmacist promptly.
Before taking any additional ED medication, have the possible dosing error or unclear instructions resolved. Do not try to compensate with another medicine, induce vomiting, or use a home remedy.
Have the following information available:
The product name and a clear photo of the pharmacy label.
Every active ingredient and its listed amount.
How much you took and the approximate time you took it.
Any tadalafil or other ED medicine used recently.
Other medicines, supplements, alcohol, or recreational substances used.
Current symptoms and relevant heart, kidney, or liver conditions.
Keep the packaging. A label saying “22 mg” may refer to the amount in one dosage unit, while the prescribed dose could be described separately. The pharmacist can help resolve that distinction.
If you feel dizzy or lightheaded, avoid driving or activities where fainting could cause injury. Let the person advising you know about these symptoms rather than assuming they are harmless.
Symptoms that need urgent or emergency care
Tadalafil can cause common side effects, but some symptoms require a different level of response.
Call 911 for chest pain, severe breathing difficulty, collapse, or symptoms of a serious allergic reaction, such as swelling of the tongue or throat with breathing trouble. Stop sexual activity if chest pain or other concerning cardiovascular symptoms develop.
Seek emergency medical care for an erection lasting more than four hours, even if it is not painful. A prolonged erection, called priapism, can damage tissue. Do not wait for pain before seeking help.
Sudden vision loss or a sudden decrease or loss of hearing requires stopping tadalafil and getting medical attention right away. Hearing changes may occur with ringing in the ears or dizziness.
These warnings apply even when the medicine was taken exactly as prescribed. They should not be interpreted as reactions that happen only after an excessive dose.
Tell emergency clinicians about tadalafil before nitrate treatment
Tadalafil must not be used with nitrates, including nitroglycerin and isosorbide medicines commonly used for chest pain. The combination can cause a dangerous drop in blood pressure.
If chest pain occurs after tadalafil, call 911 and tell emergency responders what you took and when. Do not take your own nitroglycerin to treat the episode. Emergency clinicians need to decide which treatment is appropriate.
Chest pain after tadalafil belongs with emergency medical care, not an ED dose adjustment or a customer-support message.
Also tell responders about any combination product. Naming only tadalafil can leave out another ingredient that affects their decisions.