Taking Imdur with certain other medicines can cause severely low blood pressure. This includes medicine to treat erectile dysfunction or pulmonary arterial hypertension. Serious, life-threatening side effects may occur.
Tell your doctor about all your current medicines and any you start or stop using, especially:
avanafil (Stendra);
a diuretic or "water pill";
nitroglycerin;
riociguat (Adempas);
sildenafil (Viagra, Revatio);
tadalafil (Cialis, Adcirca); or
vardenafil (Levitra, Staxyn).
This list is not complete. Other drugs may interact with isosorbide mononitrate, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.
 Imdur drug interactions (more detail)
