There are some drug crimes which actually are terrorism. In Mexico, the cartels/Zetas/etc. are an existential threat, and that's spilling over. There are towns in the US where MS-13 is a locally existential threat, at least within immigrant communities. The drug gangs in the inner cities in the 1970s-1990s were, too. I'd be ok with some use of some military force (intelligence, or just straight up infantry and MPs) in certain counter-drug terrorism contexts.
(I say this as someone who is in favor of immediate legalization of MJ, and decriminalization of all other drugs, with extensive treatment available for addiction or sub-optimal drug use.)