Cenforce LD contains sildenafil (a PDE5 inhibitor) and is used for erectile dysfunction (ED). It can interact with several medicines, and some combinations can be dangerous. Important drug interactions 1. Nitrates — avoid completely Examples: nitroglycerin, isosorbide mononitrate, isosorbide dinitrate (used for chest pain/angina). Combining these with sildenafil can cause a severe drop in blood pressure. 2. Riociguat — avoid completely Used for certain types of pulmonary hypertension. The combination can cause dangerously low blood pressure. 3. Alpha-blockers — use caution Examples: tamsulosin, doxazosin, alfuzosin (often used for prostate enlargement or blood pressure). May cause dizziness or low blood pressure, especially when starting treatment. 4. Blood pressure medicines Many antihypertensive medicines can usually be combined with sildenafil, but blood pressure may drop more than expected in some people. 5. Other ED medicines Do not combine Cenforce LD with other PDE5 inhibitors such as tadalafil (Tadalista), vardenafil (Filitra), or other sildenafil products unless a doctor specifically advises it. 6. Certain antifungal and antibiotic medicines Examples: ketoconazole, itraconazole, clarithromycin, erythromycin. These can increase sildenafil levels in the body and may increase side effects. 7. HIV medicines (protease inhibitors) Examples: ritonavir, saquinavir. These may greatly increase sildenafil exposure and require medical guidance. 8. Alcohol Heavy alcohol intake can increase dizziness, low blood pressure, and may make erections more difficult. If you tell me the other medicines you take (names and doses)—especially heart, blood pressure, prostate, or antidepressant medicines—I can help check whether they may interact with Cenforce LD.