If you take too much tadalafil or take it together with these medicines, the chance for side effects will be higher. The dose of this medicine will be different for different patients. The following information includes only the average doses of this medicine. Another brand of tadalafil is Adcirca, which is used to treat pulmonary arterial hypertension … -Patients taking this drug for erectile dysfunction should not take Adcirca (R) or other PDE5 inhibitors.-Patients should seek emergency treatment if an erection, whether painful or not, lasts more than 4 hours.-Patients should seek immediate medical attention in the event of a sudden loss of vision in one or both eyes while taking this drug. Grapefruit juice may also increase the side effects of tadalafil.Note that this list is not all-inclusive and includes only common medications that may interact with tadalafil. If you are between the ages of 18 and 60, take no other medication or have no other medical conditions, side effects you are more likely to experience include:Notes: In general, seniors or children, people with certain medical conditions (such as liver or kidney problems, heart disease, diabetes, seizures) or people who take other medications are more at risk of developing a wider range of side effects. Could Viagra, Cialis Help Boost Colon Cancer Survival? However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Keep from freezing.Do not keep outdated medicine or medicine no longer needed.Ask your healthcare professional how you should dispose of any medicine you do not use.Portions of this document last updated: Feb. 01, 2020Copyright © 2020 IBM Watson Health. If your dose is different, do not change it unless your doctor tells you to do so.The amount of medicine that you take depends on the strength of the medicine. The risk of nons… We comply with the HONcode standard for trustworthy health information - Take the tablet at the same time of day each day. Do not use more of it, do not use it more often, and do not use it for a longer time than your doctor ordered. Available for Android and iOS devices. Tadalafil is a medicine used to treat erection problems (erectile dysfunction) and symptoms of an enlarged prostate (benign prostate enlargement).. Tadalafil is a generic that costs less than branded versions.Medicines that interact with tadalafil may either decrease its effect, affect how long it works for, increase side effects, or have less of an effect when taken with tadalafil. Read it again each time you refill your prescription in case there is new information. Revision date: June 10, 2020.Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.The easiest way to lookup drug information, identify pills, check interactions and set up your own personal medication records. This medicine comes with a patient information leaflet. Also, do not stop taking this medicine without checking first with your doctor. Do not split, break, chew, or crush it. Use only the brand of this medicine that your doctor prescribed. Tadalafil relaxes muscles of the blood vessels and increases blood flow to particular areas of the body. Symptoms include a headache, dizziness, or fainting when standing. An interaction between two medications does not always mean that you must stop taking one of the medications; however, sometimes it does. It's also sometimes used to treat pulmonary hypertension (high blood pressure in the blood vessels that supply the lungs).. Tadalafil is available on prescription only. Cialis® also contains tadalafil. Tadalafil oral tablet can interact with other medications, vitamins, or herbs you may be taking. Advertising revenue supports our not-for-profit mission.Check out these best-sellers and special offers on books and newsletters from Mayo Clinic. All rights reserved. Common medications that may interact with tadalafil include:In addition, taking tadalafil with too much alcohol can lead to orthostatic hypotension, which is a drop in blood pressure when you go from a sitting or lying down position to standing.