I asked my biochemist-med tech husband to clarify the heroin- morphine in labor. Opium is purified to morphine (and morphine is used in medicine for pain relief; Duramorph is morphine sulfate). Morphine may be further purified (illegally, I may add) to heroin, which is not used in medicine any longer. I believe that it was, as heroin triturate, until the 1920s in the USA. My husband is also a former American, and so doesn't know about Scotland. Mary, is it possible that your diamorph be a trade name for morphine, not heroin (which is stronger, being more purified)? Judy Knopf in Beer Sheva, Israel P.S. Ed (the husband) has always been an antique freak. Coming from Boston helped. Until movers broke it, we had an empty bottle clearly marked "Heroin" that he found in an antique store somewhere and got a real kick out of shocking people with it. And people say that *I* have a weird sense of humor.....