I had a look last night and saw the following on ebay from UK sellers (there are more sellers than just this one), it isn't meant for shrimp but for Koi,
https://www.ebay.co.uk/itm/403847496794?hash=item5e072fc45a:g:AT0AAOSwFZhiuvLi&amdata=enc%3AAQAHAAAAoELtkxX0y1eOp0VY6LduoJ1NkgqHvNf9m%2BxDA9nwGWMeHXPlhuBuoHLz1Hg4c9dLBF19lNew47GjxpEg14BP%2BbkhhYZuDGT93wbzXt%2B4mrA1W6sKEw5AXPJ07QZDU%2BAl80M7ezmebad84QXyk52N9Mdiwl5eFUvOOzDWcs2Q22Rvmc8ngUZDsbBkWrSF1Zf%2B18Q39XFt9sOtFyCNAitt7DY%3D|tkp%3ABk9SR6LrtPDZYA
Depending on where you want to go next, ie is it worth the expense, time and hassle of trying to treat (especially if it only appears to be one shrimp affected), it may be worth trying the above by adding one small drop at a time (a day) to the seperated container and see if it works, but it would be an 'experiment' and you have little to lose as the shrimp will probably die off anyway??? You should probably remove some water from the shrimp container and mix in the medication well, and then return that water to the shrimp container (slowly), rather that just put the medication straight into the shrimp container water with the shrimp in situ.
There is also the link from JayC but I don't see that as a product we have in the UK so I don't know whether that is 'legal' here? It appears to be the same Koi product but doesn't show up on UK Amazon when I tried and don't know which country it would come from?
Hopefully you only have the one affected shrimp and as you have seperated it quickly, fingers crossed it wasn't spread in the tank?