Sense and Nonsense?

It does appear that the UK Government is finally seeing sense and will shortly be freeing GPs to prescribe cannabis-derived medicines (as is already in case in some other countries) for the control of certain types of epilepsy and other medical conditions (https://www.theguardian.com/society/2018/jul/26/cannabis-based-medicines-get-green-light-as-uk-eases-rules). The former reluctance to do this appeared to be rooted in the doomed 'war against drugs'. It is also bizarre that nobody appears to have noted that it has long been possible to have heroin (illegal) co-existing with its derivative, morphine (legal and much used in pain relief). The chemicals concocted by plants (largely for their own protection against herbivores) are the basis of many pharmaceutical preparations but it has not always proved easy to understand the full range of their potential effects on diverse populations without considerable time elapsing.