Dubai has been off my list of places to transit or visit for leisure for some time because of this under-documented, over-enforced problem with medicines and illegal drugs. Frankly, they'd probably find nanograms of cannabis on my bags and shoes even though I've never consumed it in my life - simply from walking around the restaurant areas of Amsterdam on regular business visits there. Having to explain the medicines (not even controlled substances) I carry that keep me alive and hoping they don't decide to throw me in jail is not a strategy.