Tadalafil (Pah)
Tadalafil (PAH) 20MG
Tadalafil is one of the 4 meds in QUAD
Sildenafil, tadalafil, PT-141 & L-Citrulline in one sublingual dose · Works in ~15 min · Lasts up to 36 hours
What is Tadalafil (Pah)?
Tadalafil (PAH) is a phosphodiesterase type 5 (PDE5) inhibitor used primarily in the treatment of pulmonary arterial hypertension (PAH) to improve exercise capacity and delay clinical worsening. This medication works by relaxing blood vessels in the lungs, thereby increasing blood flow and reducing the workload on the heart.Side Effects
- Sudden loss of vision
- Painful erection or an erection that lasts longer than 4 hours with or without pain
- Lightheadedness, fainting
Warnings
- Sudden decrease in hearing or hearing loss, ringing in the ears, dizziness
- Sudden loss of vision
- Keep all medicine out of the reach of children. Never share your medicine with anyone.
- Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.
- This medicine may cause the following problems: Low blood pressure (especially if taken with other medicines that lower blood pressure)Painful or prolonged erectionHearing or vision problems
Prescription savings · · · ·
What is Tadalafil (Pah) ?
Tadalafil (PAH) is a phosphodiesterase type 5 (PDE5) inhibitor used primarily in the treatment of pulmonary arterial hypertension (PAH) to improve exercise capacity and delay clinical worsening. This medication works by relaxing blood vessels in the lungs, thereby increasing blood flow and reducing the workload on the heart.- Sudden loss of vision
- Painful erection or an erection that lasts longer than 4 hours with or without pain
- Lightheadedness, fainting
- Chest pain, trouble breathing
- Blistering, peeling, or red skin rash
- Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
- Sudden decrease in hearing or hearing loss, ringing in the ears, dizziness
- Sudden decrease in hearing or hearing loss, ringing in the ears, dizziness
- Sudden loss of vision
- Keep all medicine out of the reach of children. Never share your medicine with anyone.
- Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.
- This medicine may cause the following problems: Low blood pressure (especially if taken with other medicines that lower blood pressure)Painful or prolonged erectionHearing or vision problems
- Tell any doctor who treats you that you are using tadalafil.
- Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, lung or breathing problems, diabetes, high cholesterol, cancer (including leukemia, multiple myeloma), sickle cell anemia, bleeding problems, stomach ulcer, problems with your penis, or eye problems. Tell your doctor if you have angina or chest pain during sex, heart disease, heart rhythm problems, high or low blood pressure, or a history of heart attack or stroke. Also tell your doctor if you smoke or drink alcohol.
Tadalafil (Pah) Coupons & Prices
Tadalafil (PAH) 20MG
Tadalafil is one of the 4 meds in QUAD
Sildenafil, tadalafil, PT-141 & L-Citrulline in one sublingual dose · Works in ~15 min · Lasts up to 36 hours
Tadalafil is one of the 4 meds in QUAD
Sildenafil, tadalafil, PT-141 & L-Citrulline · Works in ~15 min · Lasts up to 36 hours
Looking for a tadalafil (PAH) coupon? The pulmonary arterial hypertension form of tadalafil — sold under the brand names Adcirca and Alyq and dosed at 40 mg once daily — is available as a lower-cost generic, but the cash price can vary widely from one pharmacy to the next. Rx.com compares tadalafil prices across more than 60,000 U.S. pharmacies so you can find today's best price with a free discount coupon. Enter your ZIP above to see the current price near you.
What is tadalafil for PAH and how does it work?
Tadalafil is a phosphodiesterase type 5 (PDE5) inhibitor. When used for pulmonary arterial hypertension (PAH, WHO Group 1), it relaxes the blood vessels in the lungs, which lowers the pressure the heart has to pump against and helps improve a person's ability to exercise. This is the same active ingredient found in Cialis, but the PAH version — brand names Adcirca and Alyq — is FDA-approved specifically for pulmonary arterial hypertension and is taken as a 40 mg dose once daily.
Because it is the same molecule as Cialis (which is separately approved for erectile dysfunction and benign prostatic hyperplasia), using PAH-labeled tadalafil is effectively the same drug at a different dose. Your prescriber decides which formulation and strength is right for your condition.
Cost of generic tadalafil (PAH) without insurance
Generic tadalafil is available, which generally makes it far more affordable than the Adcirca or Alyq brand. Even so, the cash price for the 40 mg PAH dose is not the same everywhere — pharmacies set their own prices, and the gap between the highest and lowest price in the same town can be large. That is exactly why comparing before you fill matters, especially if you are paying without insurance.
Rx.com checks the live cash price across more than 60,000 pharmacies and gives you a free coupon you can show at the counter. There is no manufacturer copay card for the generic; the savings come from the coupon price itself. Enter your ZIP above to see today's price near you and print or text yourself the coupon.
Related and alternative medications
Tadalafil belongs to the same PDE5-inhibitor class as sildenafil. For pulmonary arterial hypertension, sildenafil is sold as Revatio. If you were prescribed tadalafil for another use, you may also see it as Cialis. A different type of PAH medicine, riociguat (Adempas), works through a separate pathway and is not combined with tadalafil (see the safety note below).
- Tadalafil — the generic active ingredient
- Cialis — brand tadalafil for ED/BPH
- Sildenafil — another PDE5 inhibitor
- Revatio — sildenafil for PAH
- Adempas — riociguat for PAH
Only your prescriber can decide whether an alternative is appropriate for you. Use Rx.com to compare the coupon price on whichever medication you are prescribed.
Safety and important warnings
Tadalafil has no FDA boxed warning, but there are important safety points. It should never be taken with any nitrate medication (such as nitroglycerin or isosorbide) or with the guanylate cyclase stimulator riociguat (Adempas), because the combination can cause a severe and potentially fatal drop in blood pressure. It can also add to the blood-pressure-lowering effect of alpha-blockers and other blood-pressure medicines.
Tell your prescriber about all your medications and conditions, including kidney or liver problems, cardiovascular disease, and pulmonary veno-occlusive disease. The dose may need to be lowered in mild-to-moderate kidney or liver impairment, and it should generally be avoided in severe kidney impairment. Rare but serious risks include sudden vision loss (non-arteritic anterior ischemic optic neuropathy), sudden hearing loss, and a prolonged erection lasting more than 4 hours (priapism), which needs emergency care. This information is not medical advice — always talk with your doctor or pharmacist before starting, stopping, or changing this medication.
This Tadalafil (Pah) information was written and reviewed against authoritative U.S. medical sources — MedlinePlus (U.S. National Library of Medicine), DailyMed, and FDA prescribing information — and checked for accuracy. It is provided for education and is not a substitute for professional medical advice.
Verify the official label: Tadalafil (Pah) on DailyMed (FDA)
Reviewed against FDA labeling · Last reviewed July 2026
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Medical disclaimer: This information is provided for general educational purposes only and is not medical advice. It is not a substitute for professional diagnosis or treatment. Always consult a licensed physician, pharmacist, or other qualified healthcare provider before starting, stopping, or changing any medication or treatment. Never disregard professional medical advice or delay seeking it because of something you read here. If you think you may have a medical emergency, call your doctor or 911 immediately.