Strips of European pharm grade benzos (kern, galenika, etc) and also opiates like codeine are going out of stock, fast, and people are struggling to resupply. This is like panic buying toilet roll except if you don't have the means to wipe your arse you get withdrawals & seizures.
Next up I suspect will be the other boxed brands, then the likes of MSJ's & xanax bars if this goes on long enough. Anything made domestically and in abundance will hold out the longest. Benzos & opiates from Serbia etc though? Stock up & consider this the time to taper if you have an addiction. Seriously, I'm seeing this in numerous places and have been told directly from vendors that they can't source more kern diazepam/etc.
I suspect the same from MDMA/ketamine/psychedelics, as I'm 99% certain none are made domestically (apart from maybe DMT/changa, but that will be effected too when people can't resupply the plants). Even if they were, there are restrictions on movement which are possibly going to tighten. My friend told me all his coke dealers are drying up.
Not only that, but this isn't a good time to trust that it's safe to put whatever you have up your beak.