Vidalista CT 20 Consult a doctor before using it if you: Have heart disease, chest pain, heart failure, or a recent heart attack or stroke. Have liver or kidney problems. Have low blood pressure or uncontrolled high blood pressure. Take medicines for high blood pressure, an enlarged prostate, or heart conditions. Have previously experienced sudden vision loss or a prolonged erection. Take other erectile dysfunction medicines or medicines that may interact with tadalafil. 102299 +1 Important: Do not take tadalafil with nitrate medicines such as nitroglycerin or isosorbide, or with riociguat. These combinations can cause a dangerous drop in blood pressure. If you tell me whether you have a heart condition, liver or kidney problem, or take any regular medication, I can explain which precautions are relevant to you.