I need to know the inactive ingredients because I'm allergic to talc. I had a reaction which is low blood pressure, dizziness, irregular heartbeat, and feeling very tired. Unable to walk. On a patient with heart failure. The did well with the aid of another water pill. ## The inactive ingredients for Zaroxolyn 2.5 mg are listed as: - Magnesium Stearate - Microcrystalline Cellulose - D&C Red No. 33 NDC: 53014-975 What you've reported sounds like some of the possible side effects of this drug according to DailyMed: dizziness/lightheadedness, drowsiness, fatigue, weakness. And just to confirm - you are taking the brand name and not a generic form, right?