Vidalista 2.5 mg, a medication used to treat erectile dysfunction, typically begins to work within 30 to 60 minutes after ingestion. However, the exact onset time can vary depending on individual factors such as metabolism, age, and overall health. For optimal results, it's recommended to take the medication on an empty stomach or after a light meal. Sexual stimulation is necessary for Vidalista to be effective, as it works by increasing blood flow to the penis to help achieve and maintain an erection. Always follow your healthcare provider's instructions regarding dosage and usage.