Cenforce Soft contains sildenafil citrate as its active ingredient. Cenforce Soft may interact with certain medications or medical conditions. Inform your healthcare provider about any other medications you are taking and any pre-existing health conditions. Like any medication, Cenforce Soft may cause side effects. Common side effects include headache, flushing, stuffy or runny nose, indigestion, and dizziness. Serious side effects are rare but should be reported to a healthcare professional if experienced.