In my experience, it may be of some help to take GABA (amino acid) as a supplement. It's generally superior to, and far less dependency-forming than, increasing your GABA levels by taking benzodiazepines, Lyrica or Neurontin. Not as effective for acute panic attacks, but works quite well for chronic/periodic anxiety. I know it's already helped me with worries about my fully sedated (propofol) dual-scoping procedure in a couple of weeks. With all my other conditions, and tendency for my body to react severely to the slightest inflammation, I have any number of worries about biopsy sites becoming inflamed or even infected....and plenty of other things. GABA supplementation has helped, as have Vit. D supplementation and a few other things.
Next on my list for treating my anxiety without tolerance/dependence-forming pharmaceuticals is DL-Phenylalanine, which is the precursor to Phenylethylamine, the body's "love chemical" and well proven to help with pain as well as anxiety and depression.
Conditions: Reactive Arthritis (AKA Reiter Syndrome), Crohn's Disease, Chronic Pelvic Inflammatory Syndrome, Sacroiliitis, Costochondritis, As Yet Unknown MS-Like Relapsing/Remitting Neuropathy, and a partridge in a pear tree.
Medications: Currently not that many are taken daily, but there are many at my disposal for part-time use. Low dose pain medication, after years at high doses. Working on innovative ways of taking lesser-known pharmaceuticals and non-prescription supplements to maximum benefit.