Fildena 100 mg should only be taken once within a 24-hour period. It is important not to exceed this dosage, as taking it more frequently can increase the risk of side effects. While it is effective in treating erectile dysfunction by improving blood flow to the penile, taking more than the recommended dose can lead to complications such as headaches, dizziness, and other adverse reactions. If you feel the need for more frequent doses, consult your doctor for appropriate adjustments or alternative treatments to meet your needs safely.