Always inform your doctor about all medications you are taking, including over-the-counter drugs, herbal supplements, and recreational drugs, before starting Cialis 20mg. This includes nitrates, which are found in some heart medications. Combining Cialis with nitrates can cause a dangerous drop in blood pressure.
Alpha-blockers, often prescribed for high blood pressure or prostate problems, can also interact with Cialis, potentially leading to dizziness or fainting. Your doctor might adjust your dosages or recommend alternatives.
Certain antifungal medications, such as ketoconazole and itraconazole, can increase Cialis levels in your blood, potentially leading to side effects. Similar interactions can occur with HIV protease inhibitors. Your doctor may recommend a lower Cialis dose or an alternative treatment.
Cialis can interact with medications metabolized by the same liver enzymes, potentially affecting their efficacy or increasing the risk of side effects. Examples include some antibiotics and anticonvulsants. Your doctor should carefully monitor your condition while you are taking both Cialis and these medications.
Grapefruit juice can inhibit the metabolism of Cialis, raising its concentration in the blood and increasing the risk of side effects. Avoid grapefruit juice while taking Cialis 20mg.
This list isn’t exhaustive; discuss all your medications with your healthcare provider to ensure safe and effective use of Cialis.


