(-)-Bicuculline methochloride is an enantiomer of the GABA antagonist (+)-bicuculline methochloride. It increases the firing rate in rat cortical neurons similar to the (+) isomer but lacks GABA antagonist activity. (-)-Bicuculline methochloride inhibits sodium-independent GABA receptor binding with an IC50 value of 500 μM, which is approximately 100-fold less potent than (+)-bicuculline methochloride, but there is no stereoselectivity for sodium-dependent GABA receptor binding.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.