Fildena is available in tablet form and is usually taken orally with water. It should be taken 30 minutes to an hour before sexual activity and should not be taken more than once a day. The effects of Fildena usually last for around four hours, although this can vary depending on the individual. Fildena Tablets come in various strengths, ranging from 25mg to 200mg. The recommended starting dose is usually 50mg, although this can be increased or decreased based on individual response and tolerance.