Vidalista CT 20 is a medication that contains tadalafil, commonly used to treat erectile dysfunction. While memory loss is not a commonly reported side effect of Vidalista CT 20 mg, all medications can potentially have side effects, and these can vary between individuals. Tadalafil primarily works by increasing blood flow to certain areas of the body, but some users might experience side effects like headaches, dizziness, or trouble sleeping, which could potentially indirectly affect memory or focus. If you experience any unusual or persistent symptoms, including memory issues, it's important to consult a healthcare professional to determine if the medication is the cause.