USP 797 doesn't change with vial size The procedural rules under United States Pharmacopeia General Chapter 797 apply identically whether the vial is 10 mg, 20 mg, or 30 mg: Preparation inside an ISO Class 5 primary engineering control That hood inside an ISO Class 7 cleanroom buffer area Gowning sequence and antiseptic hand cleansing before entry Sterile 70% isopropyl alcohol disinfection of vial septa Single-use sterile syringes, needles, and filter needles Documentation of lot numbers, beyond-use dates, and pharmacist signatures What changes with vial size is the number of weekly doses the preparation will support, which affects beyond-use date assignment and the cumulative number of septum punctures
Poor hygiene or reused needles can cause infection, and an injection placed badly can rarely irritate a nerve
Positioning the pen, maintaining the right angle, and holding steady pressure while you cant see what youre doing isnt something most people want to manage weekly
It is not pharmaceutical companies trying to sell you more medication
You have previously tried to lose weight through diet and exercise without reaching your goals