Dechra - Flusapex Drops (Frusemide) 10mg/ml - 1MLFlusapex Drops is an aid in the treatment of oedema in dogs and cats. It has no adverse effects in pregnant animals. Active Ingredient Frusemide. Each mL contains 10mg of Frusemide. Actions Frusemide is the most potent and commonly prescribed Loop of Henle diuretic, which causes excretion of sodium, potassium and water. Contraindications Use in patients with progressive renal disease if azotaemia increases or oliguria occurs during therapy. Use in