Forzest 20 mg is not effective for all men, although it can be effective for many men with erectile dysfunction (difficulty getting or maintaining an erection). Forzest 20 mg contains tadalafil, which increases blood flow to the penis during sexual stimulation. Its effectiveness depends on the cause of the erection problem, general health, other medicines, and correct use. It may help for up to 36 hours, but it does not cause a continuous erection. Imimg +1 Why might it not work for some men? Diabetes or poor blood circulation. Nerve Forzest 20 mg  or hormonal problems. Anxiety, stress, or relationship difficulties. Incorrect use or an underlying medical condition requiring treatment. Important safety warning for heart patients Do not take Forzest with nitrate medicines such as nitroglycerin or isosorbide, because the combination can cause a dangerous drop in blood pressure. People with certain heart conditions also need medical assessment before using tadalafil. DailyMed +1 Let me ask you two questions 1. What is your main problem? A. Difficulty getting an erection B. Erection does not last long C. Ejaculation happens too quickly D. Both erection and ejaculation problems 2. Do you have heart disease, high blood pressure, or diabetes? Your answers will help me explain whether Forzest 20 mg is appropriate for your situation.