[mtdewcmu]

It can be hard to untangle what caused what. My feeling after many years is basically that emotions are emotions and drugs are drugs: if you feel anxious, that's an emotion. The drug may have been involved in setting the anxiety off, but anxiety is still an emotion and not a drug effect. Not everyone is going to become anxious from any given drug, because different people have different sensitivities to the sort of stimuli that may trigger anxiety. A true drug effect will not feel like an emotion.

It can be useful to pay attention to when a drug is triggering anxiety; just in case you go on to try other meds in the future.