I know there are people who have reported getting symptoms of FND after taking/stopping meds ...

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... and people with a FND dx who have found it hard to tolerate the meds they are given. So this brings a sense of hope to me:

Matching drugs to DNA is 'new era of medicine'. We have the technology to start a new era in medicine by precisely matching drugs to people's genetic code, a major report says. Lord David Prior, the chairman of NHS England, said: "This will revolutionise medicine."

He said pharmacogenomics "is the future" and "it can now help us to deliver a new, modern personalised healthcare system fit for 2022".

bbc.co.uk/news/health-60903839