When people take anti-anxiety drugs like Xanax the drugs relieve the anxiety by raising levels of gamma amino butyric acid (GABA) in the brain. GABA acts as both a neurotransmitter and a neurotransmitter inhibitor. The later effect is what controls anxiety. Alcohol also raises GABA levels, so it can easily mask a mild case of anxiety.
I have taken low doses of xanax [.25mg for awhile, then .50mg for about six months now] for a few years now to help with insomnia and am considering trying to wean off it now.
Should I do lower and lower dosage over several weeks/months or just start taking the same dose I'm taking now but take it every other night for some weeks/months, then every three days, and so on or should I do both of these?
Drugs like this are best weaned off of by reducing the dosage for a period of time, then reducing the doasage again for a while.Eventually when the dose is low enough the dosages can be skipped, with missed dosages gradually increasing in time between until completely off.
Also, would it be prudent to start take GABA now to build up the levels in my brain so there's less of a withdrawl experienced?
Yes, either GABA or glycine, which is easier to absorb. Glycine also raises GABA levels.