Malegra FXT, the person taking it should tell their doctor or pharmacist about troublesome or unusual side effects. A healthcare professional can also report suspected adverse reactions to the relevant medicines regulator. If your Malegra FXT contains sildenafil + fluoxetine, important symptoms that need prompt medical attention include: An erection lasting more than 4 hours Chest pain, fainting, or severe dizziness Sudden vision or hearing loss Severe allergic symptoms Agitation, confusion, fever, sweating, or muscle twitching, which can indicate serotonin toxicity from fluoxetine. I iMedix +1 For routine side effects such as headache, indigestion, nausea, or flushing, contact your doctor/pharmacist if they are persistent or bothersome. C Cleveland Clinic If you meant “who is at higher risk of side effects from Malegra FXT?”, I can explain that too.