Although the mechanism of action of valproate is not fully understood,  traditionally, its anticonvulsant effect has been attributed to the blockade of voltage-gated sodium channels and increased brain levels of gamma-aminobutyric acid (GABA).  The GABAergic effect is also believed to contribute towards the anti-manic properties of valproate.  In animals, sodium valproate raises cerebral and cerebellar levels of the inhibitory synaptic neurotransmitter, GABA, possibly by inhibiting GABA degradative enzymes, such as GABA transaminase , succinate-semialdehyde dehydrogenase and by inhibiting the re-uptake of GABA by neuronal cells. 
As of now the main source of Trenbolone is from implants for cattle being converted into an injectable or transdermal compound, from powder, and of course Underground Labs. “Home brewing” powder or cattle implants seems to be the preferred method of obtaining injectable Trenbolone Acetate, because the user would have much more control over the potency and sterility of the drug. Trenbolone is much more expensive than other anabolic steroids ranging from 15 dollars per gram of powder or 150 for a single 10 ml bottle. The cost of Trenbolone should not matter, it is worth every penny.