Meds and therapy. Standard maintenance doses of ssris can easily delay ejaculation. Medications along with therapy (cbt - anxiety disorders for dummies book) can help alleviate any anxiety causing or contributing to this.
SSRI's have helped. There have been some studies looking at the effect of ssri antidepressants - especially Paxil (paroxetine) - on treatment of premature ejaculation.
SSRIs. A common side effect of ssri antidepressants is delayed orgasm (sometimes prohibitively so). This.