The dosage of 40 mg indicates the amount of tadalafil present in each tablet. It's important to understand that Tadarise should only be taken under the guidance of a healthcare professional, as it may interact with other medications or medical conditions. Additionally, following the prescribed dosage and instructions for use provided by your doctor or pharmacist is crucial for safety and effectiveness.Common side effects of Tadarise may include headache, flushing, indigestion, nasal congestion, muscle pain, and back pain. It's essential to be aware of these potential side effects and to seek medical advice if they become bothersome or persistent.