Codeine/Antihistamines be the cause of enlarged Prostate?

All antihistamines can cause retention if you have an enlarged prostate. I always avoided them and heeded the codeine warnings and took paracetamol instead, 

John, from my personal experience I know that an enlarged prostate that is inhibiting flow enough to be very bothersome will be made worse by use of antihistamines. This is a common effect. I don't believe it will cause BPH, though. 

I'm taking codeine for another complaint, codeine will and do cause constipation which will cause pain as the stools push against the prostate as for antihisamines,

I took chlorpheamine for Hay fever and it sent me into retention due to it causing the prostate and to swell and the bladder muscles to contract, that taught me to read the information leaflet as it say's "do not take if you have urine problems or and prostate problem."

I hope this helps, kind regards Howard.

PS: if in doubt consult your GP or Pharmasist.

I imagine you can have prostate pain -- prostatitis for example -- and not have urinary retention. Maybe that was what the NHS site was referring to?

Like others have said, you have to be careful with some drugs -- opiates, antihistimines, decongestants, etc -- as they can make urinary retention worse. That said, I have taken OTC antihistimes and decongestants for  allergies and colds, and really didn't notice that much of a difference. So, I don't think it's necessarily that you can never take them, just be aware and be careful, and check with your doc if not sure.

Jim

Thank you so much gentlemen.Really appreciate your input as always.