Hello,
Welcome to the ehealthforum and I am really glad to help you out. Your concern is regarding the early ejaculation that your husband is having. The symptoms that your husband is having can be due to premature ejaculation.
It is most often caused by anxiety and too much stimulation. Depending on when premature ejaculation has started, it can be primary or secondary. The treatment of premature ejaculation is having a psychological session with the couple, stop-start or squeeze-pause techniques, desensitizing creams and SRRI (selective serotonin reuptake inhibitors) in severe cases like Fluoxetine which you have been prescribed. I would suggest you to take it as prescribed by your doctor.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care.