Tadaga 5 mg, containing tadalafil, can cause side effects like headaches, flushing, indigestion, nasal congestion, back pain, and dizziness. Most side effects are mild and temporary. To manage them, stay hydrated, avoid alcohol, and rest if dizziness occurs. If headaches persist, over-the-counter pain relievers may help. Seek medical attention if you experience chest pain, severe allergic reactions, or prolonged erections lasting over 4 hours. Always follow your doctor’s guidance and report any unusual or severe symptoms promptly.