Sildenafil acts primarily in the Femalegra 100 drug. Femalegra 100 is used when women suffer from sex problems. Femalegra 100 Mg must be taken once a day. Femalegra 100 must be taken once a day. Femalegra 100 is not the only drug used by men. This drug should not be used only by women. Keep these tablets away from small children and pets.