What Causes Delayed Ejaculation After Having Citalopram?

Question: im 33 and taking 10mg citalopram daily, i find it difficult to ejaculate during sex since taking the ssri. Im wondering if viagra could possibly assist in this problem? if the answer is yes or possibly could you please explain the physiology behind this...thanks. a can still achieve an erection...

Thanks for your answer...in regard to cyproheptadine 4 mg antihistamine would this interfere with the therapuetic effect that I am getting from the citalopram (depression and anxiety reduction) if i was to use it ounce or twice a week? I have taken antihistamines before and are familiar with the sedating groggy side effects but would not like to return to having the labile mood that i suffered prior to the ssri.

Thanks again for your reply...i think that perhaps you missunderstood my question...aside from the groggy effect that i have experienced from periactin when used for a completely different reason when not on a ssri. My question is directed directly in relation to ......... Now that i am on the ssri do you think that if i used the periactin 4mg ounce or twice a week (disregarding the sedating effect of the antihistamine) while on the ssri, could i experience interference with the theraupuetic effect of the citalopram as you mentioned that the periactin has an anti seratonin action?

clarification the question is- if i took periactin a couple times a week for sex could i expect interference in the positive effect that i am getting from the citalopram?

thanks for your help