Fildena Professional 100 mg is a fast-acting medication used to treat erectile dysfunction (ED) in men. It contains sildenafil citrate and comes in a sublingual tablet form, which dissolves under the tongue for quicker absorption—typically within 15 to 30 minutes. By increasing blood flow to the penis during sexual stimulation, it helps achieve and maintain a firm erection. The effects can last for up to 4–5 hours, and it should be taken only once in 24 hours. Common side effects include headache, flushing, and dizziness, and it should not be used with nitrates or certain other medications.