Precautions and side effects: Like any medication, Tadagra 20 mg has potential side effects and precautions. Common side effects may include headache, indigestion, muscle aches, back pain, and nasal congestion. It may also cause a drop in blood pressure, so caution is advised for individuals taking medications containing nitrates or alpha-blockers. It’s important to consult a healthcare professional before using Tadagra 20 mg to ensure it is safe and appropriate for your specific situation.