Tadacip

Common use

Tadacip belongs to the class of drugs known as phosphodiesterase-5 (PDE-5). When sexual stimulation occurs, Tadacip enables a man's penis to fill with enough blood to cause an erection. In men with erectile dysfunction a blood flow to the penis is not enough to produce erection. The main component of Tadacip is Tadalafil, it relaxes smooth muscles, widens blood vessels in the penis and this allows blood to fill cavernous bodies and result in erection. After sexual act erection disappears as in normal circumstances. Erection cannot be achieved by just taking Tadacip, it requires sexual stimulation. Active substance of the medication is Tadalafil.



Dosage and direction

Usual recommended dose is one 20 mg Tadacip (Generic Cialis) tablet per day. Consult your doctor as you may need correction of your dose due to certain conditions you have. The elder people may be more liable to the side effects of Tadalafil; therefore caution is advised to exercise in this group.



Precautions

Tadacip should not be used in men with cardiac disease for whom sexual activity is inadvisable. There is no information about priapism when erectile dysfunction is treated by Tadacip, but in patients treated with with another PDE5 inhibitor sildenafil it may occur. If your erection lasts 4 hours or more you should seek immediate medical assistance to avoid permanent damage to your penis. Inform your doctor before to take Tadacip if you have abnormal penis, including curved penis and birth defects of the penis, had coronary artery disease, arrhythmia, angina, heart attack or heart failure, hypo- or hypertension, bleeding, stomach ulcers, diabetes, hyperlipidemia (excess of lipids in the blood), sickle-cell anemia, liver or kidney failure in history.



Contraindications

Tadacip is contraindicated in patients who are using any form of organic nitrate, either regularly and/ or intermittently as it is able to potentiate their hypotensive effect.



Possible side effect

Most common side effects of Tadacip are headache, myalgia (muscle pain), dyspepsia (upset stomach following meals) and back pain. Some patients may experience facial flushing (reddening), headaches, stomach upset, diarrhea, flu-like symptoms and nausea. In more rare cases low blood pressure, blurred vision and changes in color vision, and abnormal ejaculation may occur.



Drug interaction

Try to avoid grapefruit juice, alcoholic beverages, tobacco when you use Tadacip. If you smoke tobacco and take Tadacip concomitantly this may lead to a condition called NAION (sudden optic nerve-related vision loss). Avoid taking Tadacip with medications such as Erythrityl Tetranitrate, Isosorbide Dinitrate, Isosorbide Mononitrate, Nitroglycerin, Pentaerythritol Tetranitrate. Levels and toxicity of Tadacip are increased by erythromycin, ketoconazole (Nizoral), itraconazole (Sporanox), indinavir (Crixivan) and ritonavir (Norvir). Inform your doctor if you are taking Atazanavir, Bunazosin, Clarithromycin, Doxazosin, Erythromycin, Indinavir, Itraconazole, Ketoconazole, Moxisylyte, Nefazodone, Nelfinavir, Phenoxybenzamine, Phentolamine, Prazosin, Saquinavir, Telithromycin, Terazosin, Trimazosin, Urapidil as your Tadacip dose may require correction. Inform your doctor about all prescribed and over-the-country medications and herbal products you are taking.



Missed dose

Tadacip is taken when needed before a sexual intercourse so no missed dose is supposed.



Overdose

Seek for immediate medical help if you believe that took too much of this medication.



Storage

Store at room temperature between 59-86 F (15-30 C) away from light and moisture.



Disclaimer

We provide only general information about medications which does not cover all directions, possible drug integrations, or precautions. Information at the site cannot be used for self-treatment and self-diagnosis. Any specific instructions for a particular patient should be agreed with your health care adviser or doctor in charge of the case. We disclaim reliability of this information and mistakes it could contain. We are not responsible for any direct, indirect, special or other indirect damage as a result of any use of the information on this site and also for consequences of self-treatment.

Clinical Verification

Last Clinically Updated: August 15, 2026

Written By

Dr. Elena Vance, PharmD

Clinical Specialist in Neuropharmacology

Fact Checked By

Marcus Thorne, MS

Biomedical Data & FDA Label Verification

Medically Reviewed By

Dr. Arthur Campbell, MD

Board-Certified Psychiatrist (ABPN)