Deferol is an all natural, non- prescription climax control supplement for men that can be taken to control ejaculatory problems or to prolong the sexual experience. How does it work? In clinical tess, Deferol capsules have shown that they increase the body's natural ability to control climax by favorably altering serotonin/dopamine ratios and also reduce performance anxiety. Take daily as a supplement or an hour before sexual activity. Bottle contains 40 capsules.