Fildena 150 mg is available in tablet form and is typically taken orally about 30 minutes to one hour before ****ual activity. It is important to note that ****ual stimulation is required for Fildena 150 mg to be effective. Like any medication, Fildena 150 mg can cause side effects, including headache, facial flushing, upset stomach, nasal congestion, back pain, and muscle pain.