So as hay fever season is growing ever closer and the time to buy anti histamines grows closer, I thought it prudent to ask in advance which anti histamines are prohibited in the RN? (due to drowsiness or other issues) Also am I right in thinking that buying anti histamines over the counter is fine, but having them prescribed is frowned on / against the rules? Wondering as for some anti histamines its more cost effective if they are prescribed as the doc can issue a larger quantity for same or slightly more money. I'm close to the end of the application process and would rather not stick my foot in it this close to the end. Thanks in advance for any help given and apologies if I missed a previous thread which has answered this when I did a forum search.