You should not take tadalafil if you are allergic to it, or:
- if you take other medicines to treat pulmonary arterial hypertension, such as riociguat (Adempas).
Do not take tadalafil if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate, butyl nitrate or nitrite ("poppers").Taking tadalafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure.
Some tadalafil can remain in your bloodstream for 2 or more days after each dose you take (longer if you have liver or kidney disease).Avoid nitrate use during this time.
Tell your doctor if you have ever had:
- heart problems (chest pain, a heart rhythm disorder, heart failure);
- a heart attack or stroke;
- high or low blood pressure;
- liver disease;
- kidney disease (or if you are on dialysis);
- retinitis pigmentosa (an inherited condition of the eye);
- blindness in one or both eyes;
- hearing problems;
- blood circulation problems;
- a blood cell disorder such as sickle cell anemia, multiple myeloma, or leukemia;
- pulmonary veno-occlusive disease (PVOD);
- a physical deformity of the penis (such as Peyronie's disease), or an erection lasting longer than 4 hours;
- a stomach ulcer; or
- health problems that make sexual activity unsafe.
A small number of people taking tadalafil have had sudden vision loss. Most of these people already had eye problems, or had diabetes or other health conditions that can affect blood vessels in the eyes.It is not clear whether tadalafil causes vision loss.
Do not start or stop taking tadalafil during pregnancy without your doctor's advice.有肺动脉高血压(PAH)地g pregnancy may cause heart failure, stroke, or other medical problems in both mother and baby.Tell your doctor right away if you become pregnant.
It may not be safe to breastfeed while using this medicine. Ask your doctor about any risk.
Cialis is not for use in women.
Tadalafil is not approved for use by anyone younger than 18 years old.
