Tadarise 40 mg contains tadalafil, which is used for erectile dysfunction. Headaches are a common side effect of tadalafil. Here’s what you should know: Timing of headaches: Headaches can occur anywhere from 30 minutes to a few hours after taking it, usually when the drug starts working in your body. Some people might get headaches later in the day, depending on how their body metabolizes the medication. Why it happens: Tadalafil relaxes blood vessels to improve Tadarise 40 mg flow, which can temporarily lower blood pressure and trigger headaches. How to manage: Stay hydrated. Avoid excess alcohol. Over-the-counter pain relievers like paracetamol can help, but follow dosing instructions. Headaches usually fade as your body adjusts. Seek medical advice if: Headache is severe or sudden You experience vision changes, chest pain, or dizziness If you want, I can also explain how long Tadarise’s effects last and when side effects are most likely—it helps predict when headaches might happen.