When medicines such as potassium supplements or aspirin are taken together with Capoten, drug interactions may develop. Interactions with Capoten may potentially cause a significant decrease in blood pressure, increased drug levels in your blood, or increased risk for infections. Other medicines that may lead to Capoten drug interactions include: potassium-sparing supplements, nitroglycerin, allopurinol, and cyclosporine.
When Capoten is taken with a diuretic, your blood pressure may decrease too much. This is more likely to occur when Capoten is first started. In order to decrease the chances of this interaction, your healthcare provider may change the dosages of either medicine, start you on a lower Capoten dosage, and/or monitor you more closely.