Hi, I think the reason they advise against it is purely because you can have DKA on these meds, if you are low carbs or keto dieting, you are by definition closer to DKA.
I low carbed properly with Jardinace which I believe is very similar to emp, they were stopped as my keytones were 3-4.
I think it’s possible but would require extreme keytone testing, I remember the keystone blood strips on the Libre sensor were £30 for ten strips, so this would be an expensive hobby, the urine test strips seem a bit unspecific to me.