There are a handful of SNPs (mainly in Cytochrome P450) that predict how fast you metabolize drugs. This is a shortcut to dosing drugs. But the big problem is that people don’t adjust their doses at all. The much more basic personalized medicine is to experiment with doses. If you aren’t doing that, using the SNPs as a shortcut to predict where to start isn’t much of an improvement.
There are a handful of SNPs (mainly in Cytochrome P450) that predict how fast you metabolize drugs. This is a shortcut to dosing drugs. But the big problem is that people don’t adjust their doses at all. The much more basic personalized medicine is to experiment with doses. If you aren’t doing that, using the SNPs as a shortcut to predict where to start isn’t much of an improvement.