Taking double the recommended dosage of Filitra 40 mg (which is typically prescribed for erectile dysfunction) can significantly increase the risk of adverse effects and complications. Doubling the dosage without medical supervision can lead to severe side effects such as priapism (a prolonged and painful erection), sudden changes in blood pressure, dizziness, fainting, vision changes, and potentially life-threatening complications.

Moreover, combining Filitra with certain medications can also increase the risk of adverse interactions. For example, taking Filitra 40mg with nitrates (commonly prescribed for heart conditions) can cause a dangerous drop in blood pressure. Similarly, combining Filitra with alpha-blockers (used to treat high blood pressure and prostate conditions) can lead to low blood pressure and dizziness.

It's crucial to always consult a healthcare professional before altering your medication dosage or combining it with other medications to avoid potential complications. They can provide personalized guidance based on your medical history and current medications to ensure your safety and well-being.