Always inform your doctor about all medications you’re taking, including over-the-counter drugs, herbal supplements, and even vitamins. This includes nitrates, often prescribed for chest pain, as combining them with Cialis can cause a dangerous drop in blood pressure.
Certain antifungals, such as ketoconazole and itraconazole, can increase Cialis levels in your blood, potentially leading to side effects. Similarly, some HIV protease inhibitors may interact.
Alpha-blockers, commonly used to treat high blood pressure and enlarged prostate, can also interact with Cialis, possibly causing dizziness or fainting. Your doctor may need to adjust your dosages or recommend alternatives.
Grapefruit juice can interfere with the breakdown of Cialis, increasing its concentration in your body. Avoid grapefruit juice while taking Cialis.
| Nitrates | Dangerous blood pressure drop | Avoid concurrent use |
| Antifungals (ketoconazole, itraconazole) | Increased Cialis levels | Discuss dosage adjustments with your doctor |
| HIV Protease Inhibitors | Increased Cialis levels | Discuss dosage adjustments with your doctor |
| Alpha-blockers | Dizziness, fainting | Monitor closely, potential dosage adjustments |
| Grapefruit Juice | Increased Cialis levels | Avoid consumption |
This information is not exhaustive. Consult your doctor or pharmacist for personalized advice on potential drug interactions, especially if you have pre-existing health conditions.


