The synthesis of (+)-10,10-dimethylhuperzine A is reported together with its kinetic (k_on and k_off) and dissociation constants for the inhibition of fetal bovine serum acetylcholinesterase. While somewhat more potent than (±)-huperzine A, the dimethyl analogue shows a slower off-rate from AChE, a result that may be of potential therapeutic value.