Your First GLP-1 Injection: A Step-by-Step Guide

Set aside an unhurried few minutes in a clean, well-lit area. Read your label from beginning to end before opening a syringe. Confirm your name, medication, prescribed dose, concentration, storage directions and beyond-use date. Check the liquid against the pharmacy’s description; ask the pharmacy about unexpected particles, discoloration or a damaged vial.

Gather the vial, the exact syringe supplied for your prescription, alcohol swabs, gauze and a sharps container within reach. Weekly weight-loss injections are not interchangeable with daily tablets. If you have a pen rather than a vial, use that device’s instructions instead of the drawing steps below.

Milligrams measure the amount of medication. Milliliters measure liquid volume. Syringe units are markings on a particular syringe, not a universal semaglutide or tirzepatide dose. The same marking can deliver different medication amounts when the vial concentration changes. Read the label every time, including after a refill.

Ask the pharmacist to identify the exact line for your dose on your actual syringe. Do not convert from a social-media chart or copy your previous vial’s units unless the care team has confirmed they still apply. The FDA alert about dosing errors with compounded injectable semaglutide describes overdoses related to measurement confusion. Our mg, mL and units guide explains the terms without replacing your prescription.

• Wash your hands with soap and running water, then dry them. Clean your work surface and keep supplies away from children and pets.
• Remove the vial’s protective cap if this is its first use. Wipe the rubber stopper with a fresh alcohol swab and let it dry. Do not touch the cleaned stopper.
• Use a new, intact syringe and needle. Following the pharmacist’s instructions, pull back the capped syringe plunger to the prescribed volume to draw in air. Uncap without touching the needle, insert through the stopper, and push the air into the vial.
• Turn the vial and syringe upside down. Keep the needle tip below the liquid and slowly withdraw to the instructed syringe marking. Gently tap visible air bubbles upward and return excess air or liquid to the vial as taught; recheck the marking at eye level.
• If the marking is unclear, the needle touches something unclean, or there is not enough medicine for the dose, stop and ask the pharmacy. Do not improvise a partial dose or combine leftovers.

The Drawing medicine out of a vial provides general vial technique. Follow any medication-specific handling directions from your dispensing pharmacy. Do not shake or mix your medication unless the pharmacy explicitly instructs you to do so.

Choose intact skin, avoiding bruises, scars, redness, swelling and hard spots. Rotate to a different spot each week rather than repeatedly piercing one location. Review our tirzepatide injection-site guide if that is your medication.

Clean the selected skin with a new alcohol swab and allow it to dry. Gently hold a fold of skin if you were taught to do so. Insert the needle at the angle demonstrated for your needle length and body tissue; general subcutaneous guidance describes 45- or 90-degree angles, but your clinician should show which fits your supplies. Push the plunger steadily until the prescribed amount is delivered, then withdraw as instructed. Do not inject into a vein or muscle. The Subcutaneous (SQ) injections explains general technique.

You may feel a brief pinch or mild stinging, or very little at all. A tiny spot of blood can happen; apply gentle pressure with clean gauze rather than rubbing. A small bruise does not by itself mean the medicine failed. Do not repeat an injection because it felt painless, and do not give a replacement dose if you are unsure how much entered—ask the care team.

Place the whole used syringe directly into an FDA-cleared sharps container without recapping, bending or breaking the needle. Never put loose needles into household trash or recycling, and never flush them. The Best Way to Get Rid of Used Needles and Other Sharps recommends closing and disposing of the container according to local rules when it is about three-quarters full.

Return the vial to the storage conditions on its label and record the date, prescribed dose and injection location. Appetite or stomach changes may appear later, not at the moment of injection. The first-two-weeks guide helps you track the early adjustment period without expecting a specific result on day one.

Seek urgent care for severe or persistent abdominal pain, especially pain that spreads to your back, persistent vomiting, inability to keep fluids down, or signs of dehydration such as very little urine or marked dizziness. These are not symptoms to simply push through until your next appointment. Severe stomach pain can signal pancreatitis or another condition needing prompt assessment.

Call 911 for trouble breathing, swelling of the face, lips, tongue or throat, fainting, or other signs of a severe allergic reaction. Do not take another dose while a serious medication reaction is being assessed. If you use insulin or a sulfonylurea, ask your clinician about low blood sugar and follow your existing treatment plan for it. The Wegovy prescribing information and Medication Guide and Zepbound prescribing information and Instructions for Use describe these precautions.

Your prescription label and Join Luma clinician’s directions take priority over general information about brand-name products. Compounded semaglutide and compounded tirzepatide are not FDA-approved. FDA-approved brand labels provide useful reference information, but their devices, concentrations, storage allowances and study results do not automatically apply to a compounded prescription.

The Understanding the Risks of Compounded Drugs explains this distinction. Keep the pharmacy label available when asking a question: it identifies the medication, concentration, directions and beyond-use date. A photograph of that label and the supplied syringe can help the care team resolve a measurement question without guessing. Never use someone else’s dose or syringe marking as your own instructions.