It was stated that one of the three drugs found in the dead sailor was DMSO (DIMETHYL SULFOXIDE). DMSO is normally used as a horse liniment. When contacting the human skin, DMSO, a liquid, is absorbed immediately, taking any medicine mixed in with it into the body. It gives the person the taste of garlic and also garlic breath. It is too strong for humans, so now mainly used with large animals, like horses.
After several months being tortured and starved in Paraguay, Tim seems to have gained weight.