Traveling abroad with meds

[MoJim]

My wife and I are going to Europe during the holiday season at the end of the year. I may also go to Costa Rica in Oct. with my sister while she is finishing up some dental work. We are in the U.S. I generally save my US scripted meds for these occasions and use IOP's meds for stateside use. Because I have panic attacks and generalized social anxiety I'm not sure I'll have enough scripted meds for the duration (23 days). Trains, planes and buses tend to make me anxious. We will be spending 4 days in Amsterdam, so that might be less of a problem! Because of the crackdown in the UK, our first and last stops, RC meds, Kratom,Kava and possibly some other herbal remedies could be unavailable and illegal. I'm not willing to risk my freedom in any foreign country whether it's Germany or Costa Rica. IF I could find the EXACT meds via IOP to put in an empty scripted bottle, that probably would work, but I would still be paranoid about doing it. Any and all advice from anyone who has been in similar circumstances would be greatly appreciated.
Thanks
MoJim