At all times as a rebel, it's your job to figure out how to use Mantel's precious nectar against them, be it by:
1. Shooting the drug administration canister on their backs to make the soldiers overdose and go berserk.
2. Killing the soldiers and taking their drug packs, quickly modifying the technology into a grenade to make the soldiers overdose and go berserk.
3. Stabbing soldiers with a haze-covered knife to make the soldiers overdose and go berserk.
You being to wonder why the rebels can only induce control the flow of drugs one way, despite using just about every weapon at their disposal. Why isn't drug withdrawal an issue in multiplayer? Why can't the rebels grab a haze pack before killing a Mantel soldier, rendering his opposition's aim shaky, strength lower and susceptibility to damage higher?
Maybe a Mantel soldier, finding his stash pickpocketed, could have a set time to find a spare haze pack before they found themselves temporarily incapacitated, you know, for a helpless living corpse humping. Because that's what we mean by evolving the FPS genre.