Always inform your doctor about all medications and supplements you are taking, including over-the-counter drugs and herbal remedies. This includes nitrates (found in some heart medications), alpha-blockers (used for high blood pressure or prostate problems), and certain antifungals. Combining Cialis with these drugs can significantly lower blood pressure, potentially leading to dizziness or fainting.
Specific Medication Interactions
Certain medications interact more strongly with Cialis than others. For example, combining Cialis with ritonavir or indinavir (HIV protease inhibitors) requires careful monitoring and potentially dosage adjustments. Grapefruit juice also interacts, potentially increasing Cialis levels in your blood.
Substances to Avoid
Avoid alcohol consumption while taking Cialis. Excessive alcohol can worsen side effects like dizziness and headaches. The combination may also increase the risk of low blood pressure.
Interaction Summary Table
| Nitrates | Nitroglycerin, isosorbide mononitrate | Severe hypotension (dangerously low blood pressure) |
| Alpha-blockers | Terazosin, doxazosin | Dizziness, fainting |
| HIV Protease Inhibitors | Ritonavir, indinavir | Increased Cialis levels |
| Antifungal Medications | Ketoconazole, itraconazole | Increased Cialis levels |
Consult Your Doctor
This information is not exhaustive. This is not a substitute for professional medical advice. Always consult your doctor or pharmacist before taking Cialis, especially if you have pre-existing health conditions or are taking other medications.
