Vidalista 10 mg contains tadalafil, and muscle pain can occur as a side effect in some users. It most commonly appears several hours after taking the medicine and may sometimes occur the next day because tadalafil stays active in the body for a long time. Muscle pain or body aches may happen because tadalafil affects blood vessel activity and certain chemical pathways involved in muscle and blood flow regulation. The discomfort is usually mild and may include: Back pain Muscle aches (myalgia) Leg or body discomfort In many cases, these effects improve within 24–48 hours. Staying hydrated and using simple comfort measures may help, but persistent or severe pain should be discussed with a healthcare professional. Seek medical advice promptly if muscle pain is severe, unusual, accompanied by weakness, dark-colored urine, chest pain, or other concerning symptoms.