Citosys 10mg Tablet is a type of antidepressant belonging to the selective serotonin reuptake inhibitor (SSRI) group of medicines. It is prescribed to treat depression, where it helps to make you feel better and prevent new episodes of depression. This medicine is also used to treat panic disorder. Citosys 10mg Tablet can be taken with or without food. The dose and how often you need it will be decided by your doctor so that you get the right amount to control your symptoms. Your doctor may start you on a lower dose and increase it gradually. Do not change the dose or stop taking it without talking to your doctor, even if you feel well. Doing so may make your condition worse or you may suffer from unpleasant withdrawal symptoms (anxiety, restlessness, palpitations, dizziness, sleep disturbances, etc). To get the most benefit, take this medicine regularly at the same time each day. Your doctor may advise you to take it in the morning if you have trouble sleeping. It may take a few weeks before you start feeling better. Let your doctor know if you do not see any improvement even after 4 weeks. Some common side effects of this medicine include nausea, vomiting, fatigue, dry mouth, increased sweating, insomnia (difficulty in sleeping), decreased sexual drive, delayed ejaculation, and erectile dysfunction. Some people may experience sleepiness after taking this medicine. Let your doctor know straight away if you develop any sudden worsening of mood or any thoughts about harming yourself. Before taking Citosys 10mg Tablet, you should tell your doctor if you have epilepsy (seizure disorder or fits), diabetes, liver or kidney disease, any heart problems, or are currently taking medicines for depression known as MAO inhibitors. These may affect your treatment. Please tell your doctor about all the medicines you are taking to make sure you are safe.