Stupid question: how do you know whether what is in the vial matches the label at all?

Following this because I am in the same place and have no idea what to ask at the appointment. Two months in on a pharmacy question list and it lines …

What is the first thing you would read if you were starting from zero?

Following this because I am in the same place and have no idea what to ask at the appointment.

Is a baseline blood test really necessary before starting something like this?

Is it normal to feel worse before better? Nobody told me that.