Codeine and dihydrocodeine can be bought over the counter in the UK in some circumstances. Codeine by itself is a Prescription Only Medicine and is available in 15mg, 30mg and 60mg strength tablets.
Definition of hammock. : a swinging couch or bed usually made of netting or canvas and slung by cords from supports at each end.
The etymology of the term hammock is obscure. Dictionaries usually give it as an archaic form of hummock (hammock appeared in print earlier than hummock). Hammock is first attested in English in the 1550s as a nautical term for a tree-covered island (a mound of trees) seen on the horizon.