Brown-Brown
Two theories;
Smokeless powder often contains nitroglycerine, a drug prescribed for heart conditions, which most likely causes vasodilation, allowing the cocaine to move more freely through the body.
According to "The Lowdown on Brown-Brown" by Brendan I. Koerner, brown-brown is most likely an urban myth. Reasons being that cocaine would be difficult to get during armed conflicts, especially in the African Continent. Brown pills that were referred to as cocaine were most likely amphetamine. The first actual report of brown-brown that uses the name brown-brown, is by a Norwegian NGO in 2005 and it states the term refers to heroin.
Does anyone know what the truth is?