Huperzine-A is derived from the Huperzia serrata plant. It helps regulate multiple neurotransmitter systems, including the glutamate and acetylcholine systems. By increasing the available acetylcholine in the brain, Huperzine-A may also help increase or support normal dopamine levels in the brain, thus helping break an addiction (especially when paired with Mucuna pruriens).
Take one capsule (400mcg) of this Huperzine-A supplement twice daily, once in the morning, and again in the afternoon. Lower dosages such as this produce the best results, while higher dosages may cause undesirable effects, so keep the dosage at this recommended level is you plan to use Huperzine-A.