Tadalafil 20mg

Cialis (Tadalafil) Drug Information

Tadalafil (Cialis) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Cialis (tadalafil) (Adcirca) is used to improve the ability to exercise in people with pulmonary arterial hypertension (PAH; high blood pressure in the vessels carrying blood to the lungs, causing shortness of breath, dizziness, and tiredness). Cialis (tadalafil) is in a class of medications called phosphodiesterase (PDE) inhibitors. It works to treat erectile dysfunction by increasing blood flow to the penis during sexual stimulation. This increased blood flow can cause an erection. Cialis (tadalafil) treats PAH by relaxing the blood vessels in the lungs to allow blood to flow easily.

If you are taking Cialis (tadalafil) to treat erectile dysfunction, you should know that it does not cure erectile dysfunction or increase sexual desire. Cialis (tadalafil) does not prevent pregnancy or the spread of sexually transmitted diseases such as human immunodeficiency virus (HIV). Cialis (tadalafil) comes as a tablet to take by mouth. It may be taken with or without food.

If you are taking Cialis (tadalafil) to treat erectile dysfunction, follow your doctor's directions and the guidelines in this paragraph. There are two different ways to take Cialis (tadalafil). Talk to your doctor about which dosing schedule is right for you. It is sometimes taken as needed before sexual activity, not more often than once every 24 hours. Your doctor will help you decide the best time for you to take Cialis (tadalafil) before sexual activity. Cialis (tadalafil) is also sometimes taken once a day every day without regard to timing of sexual activity. You may attempt sexual activity at any time between doses. If you are taking Cialis (tadalafil) on a regular schedule, take it at around the same time every day. If you have certain health conditions or are taking certain medications, your doctor may tell you to take Cialis (tadalafil) less often or may prescribe a lower dose to be taken once a day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take Cialis (tadalafil) exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

  • If you are taking Cialis (tadalafil) to treat PAH, follow your doctor's directions and the guidelines in this paragraph. You should take Cialis (tadalafil) one time a day with or without food. Take all of the tablets for your daily dose at one time each day; do not divide the tablets to take as separate doses. Take Cialis (tadalafil) at around the same time every day.
  • If you are taking Cialis (tadalafil) for erectile dysfunction, your doctor will probably start you on an average dose of Cialis (tadalafil) and increase or decrease your dose depending on your response to the medication. Tell your doctor if Cialis (tadalafil) is not working well or if you are experiencing side effects.
  • If you are taking Cialis (tadalafil) for PAH, you should know that Cialis (tadalafil) controls PAH but does not cure it. Continue to take Cialis (tadalafil) even if you feel well. Do not stop taking Cialis (tadalafil) without talking to your doctor.

Ask your pharmacist or doctor for a copy of the manufacturer's information for the patient. This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Before taking Cialis (tadalafil):

  • tell your doctor and pharmacist if you are allergic to Cialis (tadalafil) or any other medications.
  • do not take Cialis (tadalafil) if you are taking or have recently taken nitrates such as isosorbide dinitrate (Isordil), isosorbide mononitrate (Imdur, ISMO), and nitroglycerin (Nitro-BID, Nitro-Dur, Nitroquick, Nitrostat, others). Nitrates come as tablets, sublingual (under the tongue) tablets, sprays, patches, pastes, and ointments. Ask your doctor if you are not sure whether any of your medications contain nitrates.
  • do not take street drugs containing nitrates ('poppers') such as amyl nitrate, butyl nitrate, or nitrite while taking Cialis (tadalafil).
  • you should know that Cialis (tadalafil) is available under the brand names Adcirca and Cialis. You should only be treated with one of these products at a time.
    tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, and nutritional supplements you are taking or plan to take.
  • Be sure to mention any of the following: alpha blockers such as alfuzosin (Uroxatral), doxazosin (Cardura), prazosin (Minipress), tamsulosin (Flomax), and terazosin (Hytrin); amiodarone (Cordarone, Pacerone); certain antifungals such as fluconazole (Diflucan), griseofulvin (Fulvicin, Grifulvin, Gris-PEG), itraconazole (Sporanox), ketoconazole (Extina, Ketozole, Nizoral, Nizoral A-D, Xolegal,),and voriconazole (Vfend); aprepitant (Emend); bosentan (Tracleer);carbamazepine (Tegretol); clarithromycin (Biaxin, in Prevpac`); diltiazem (Cardizem, Dilacor, Tiazac); efavirenz (Sustiva);erythromycin (E.E.S., E-Mycin, Erythrocin); HIV protease inhibitors including indinavir (Crixivan), nelfinavir (Viracept),and ritonavir (Norvir, in Kaletra), lovastatin (Altocor, Mevacor); medications for high blood pressure; nefazodone (Serzone); nevirapine (Viramune); other medications or treatments for erectile dysfunction; other medications or treatments for PAH; phenobarbital; phenytoin (Dilantin); rifabutin (Mycobutin); rifampin (Rifadin, Rifater, Rimactane); sertraline (Zoloft); and verapamil (Calan, Covera, Isoptin, Verelan). Your doctor may need to change the doses of your medications or monitor you carefully for side effects.


If you are taking Cialis (tadalafil) on a regular schedule, take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose or more than one dose per day to make up for a missed one. If you are taking Cialis (tadalafil) for PAH, take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one. 

Sumatriptan may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

  1. headache
  2. indigestion or heartburn
  3. nausea
  4. diarrhea
  5. flushing
  6. pain in the stomach, back, muscles, arms, or legs
    cough

If you experience any of the following symptoms, call your doctor immediately:

  1. sudden loss of vision (see below for more information)
  2. blurred vision
  3. changes in color vision (seeing a blue tinge on objects or having difficulty telling the difference between blue and green)
  4. sudden decrease or loss of hearing (see below for more information)
  5. ringing in ears
  6. erection that lasts longer than 4 hours
  7. dizziness
  8. chest pain
  9. hives
  10. rash
  11. blistering or peeling of skin

Some patients experienced a sudden loss of some or all of their vision after they took Cialis (tadalafil) or other medications that are similar to Cialis (tadalafil). The vision loss was permanent in some cases. It is not known if the vision loss was caused by the medication. If you experience a sudden loss of vision while you are taking Cialis (tadalafil), call your doctor immediately. Do not take any more doses of Cialis (tadalafil) or similar medications such as sildenafil (Revatio, Viagra) or vardenafil (Levitra) until you talk to your doctor. Some patients experienced a sudden decrease or loss of hearing after they took Cialis (tadalafil) or other medications that are similar to Cialis (tadalafil). The hearing loss usually involved only one ear and may not get better. It is not known if the hearing loss was caused by the medication. If you experience a sudden loss of hearing, sometimes with ringing in the ears or dizziness, while you are taking Cialis (tadalafil), call your doctor immediately. Do not take any more doses of Cialis (tadalafil) or similar medications such as sildenafil (Revatio, Viagra) or vardenafil (Levitra) until you talk to your doctor. Cialis (tadalafil) may cause other side effects. Call your doctor if you have any unusual problems while taking this medication

Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication. In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.

Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription. It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.