Malegra FXT Plus is a variant of Malegra FXT that also contains Sildenafil Citrate (the same active ingredient in Viagra), but it might have a slightly different formulation, such as including additional ingredients like Fluoxetine. However, the primary role of sildenafil (whether in Malegra FXT or FXT Plus) is related to erectile dysfunction (ED) and pulmonary hypertension. Sildenafil and Pulmonary Hypertension: Sildenafil, one of the key ingredients in Malegra FXT Plus, is also approved for the treatment of pulmonary arterial hypertension (PAH), which is a condition where the blood pressure in the arteries of the lungs is abnormally high. In PAH, the blood vessels that carry blood to the lungs become narrowed or blocked, leading to higher pressure in the lungs and potentially causing symptoms such as shortness of breath, dizziness, fatigue, and chest pain.