Linda, I assume you meant hydroxyzine and not hydroxide. What dose did she start you on?
Tranquilene Total Calm is a fairly good looking product but there are Three issues.
First, the vitamin B6 is 15 mg. The RDA for that is 2 mg/day. With time it will build up to toxic levels.
Second, The vitamin D is at the top of the RDA requirements BUT if your Vitamin D levels are good this will also lead to possible Vitamin D toxicity with time. Vitamin D also lowers Calcium levels.
Third, L-Tryptophan should not be taken with an AD as the combination can cause serotonin Syndrome.
Fourth, magnesium competes with calcium and may further lower calcium levels.
This is why there are over 60,000 cases of vitamin toxicity cases a year in ERs. Not only risks of over exposure but vitamin allergies as well. I have spent hours and hours trying to select a "good" supplement for individuals and found that it is almost impossible. For example the RDA for Vitamin B6 is less than 2 mg but I have found vitamins with up to 1000 mg per capsule. Ridiculous. Anymore I just recommend a vitamin profile blood test before considering things any further.
As far as the natural items like L-theanine, gaba, etc. I always suggest adding them one at a time and in the beginning in small doses to be sure there won't be an issue. That thread "and the answer to your question is..." has a lot of details on vitamin toxicity and reactions our members have had to specific items. Sorry to be such a downer on the subject.
"How do I find out if there are any drug interactions if my doctor doesn't know anything about them? Do you think a pharmacist could tell me?"
Most pharmacists would know but I have found https://www.drugs.co...teractions.html
to be a big help as well as https://examine.com/supplements/.