What's in the Box? A GLP-1 Starter Kit, Decoded (Vial, BAC Water, Syringes & More)

Opening your first GLP-1 package can be confusing — especially with a compounded semaglutide or tirzepatide order, which often arrives as a kit you assemble yourself rather than a ready-to-use pen. This is a plain-English guide to every item that should be in the box: what it is, what it does, and how to tell a complete, legitimate kit from one that is missing something it shouldn't be. Use it alongside our interactive vial label reader, which decodes the label field by field, and the reconstitution calculator for the mixing math.

What should be in the box

A complete compounded GLP-1 starter kit typically contains six things. Branded products (Wegovy, Zepbound) ship as pre-filled pens and skip most of this — the kit format is specific to vial-based compounded and some branded vial programs.

1. The medication vial — semaglutide or tirzepatide, either as a pre-mixed liquid or as a freeze-dried (“lyophilized”) powder you reconstitute.
2. Bacteriostatic water — the sterile, preserved water used to dissolve a powdered vial (not always included if your vial ships pre-mixed).
3. Insulin syringes — small U-100 syringes marked in units, used to draw and inject your dose.
4. Alcohol prep pads — to clean the vial top and your injection site.
5. A sharps container — for safe disposal of used needles (sometimes you supply your own).
6. The pharmacy label and instructions — the single most important item, and the one to read first.

1. The medication vial

The vial is the drug. It will be labeled with the peptide name and a total strength (for example, “Semaglutide 5 mg/vial”) — that is the total amount in the whole vial, usually many weeks of doses, not a single dose. Two formats exist:

• Pre-mixed (solution): already a clear liquid, ready to draw. Check that it is clear and free of particles.
• Lyophilized (powder): a small white cake or powder at the bottom of the vial that you must reconstitute with bacteriostatic water before the first dose. Our reconstitution & mixing guide walks through the steps, and the calculator tells you how much water to add and how many units to draw.

2. Bacteriostatic water (the diluent)

Bacteriostatic water is sterile water with a small amount of benzyl alcohol added as a preservative, which is what lets a multi-dose vial be punctured repeatedly over several weeks. It is used only to dissolve a powdered vial — if your medication arrived pre-mixed, you may not receive any. How much you add changes everything downstream: more water means a lower concentration and more units to draw for the same dose, and vice-versa. After the first puncture, bacteriostatic water vials are commonly discarded at about 28 days, though you should follow the dating your pharmacy assigns under USP <797>^[2].

3. Insulin syringes (U-100)

• What they are: small syringes, usually with a fixed short needle, marked in units. “U-100” means 100 units = 1 mL, so 1 unit = 0.01 mL.
• Why units, not mg: the syringe measures volume, not drug. You convert your mg dose to units using the vial's concentration. “12.5 units” is a volume mark — it is not “12.5 mg.” Treating one as the other is the error behind documented overdoses^[1].
• What to check: the syringes should be individually sealed and sterile, and the unit markings should be legible. A subcutaneous GLP-1 dose uses a short, fine needle (commonly 29–31 gauge).

4. Alcohol prep pads

Single-use isopropyl-alcohol wipes, used to swab the rubber top of the vial before drawing and to clean your injection site. They should be individually wrapped and sealed. Their job is simple but real: reducing the chance of introducing bacteria into a multi-dose vial or your skin.

5. A sharps container

Used needles are biohazard sharps and should never go loose into household trash. A proper sharps container is rigid, puncture-resistant, and sealable. Some kits include one; others expect you to use an FDA-cleared container or a heavy-duty plastic container as a stopgap, and to follow your community's sharps-disposal program. The FDA publishes guidance on safe needle disposal^[3].

6. The pharmacy label and instructions — read this first

The label is your proof of a legitimate fill and your dosing source of truth. A complete compounded-GLP-1 label should name the dispensing pharmacy, the prescriber, and you as the patient, plus the drug, strength, concentration after mixing, your prescribed dose, the lot/batch number, and a beyond-use date (BUD). Read it field by field with the vial label reader, and confirm the pharmacy itself with our pharmacy legitimacy lookup.

Red flags: what a legitimate kit should NOT look like

• No pharmacy name or no patient name on the label. A compounded vial is made for an individually identified patient and should say so. An anonymous, unlabeled vial is a serious warning sign — compounded products are not FDA-approved and an unlicensed source is not held to safety, quality, or sterility standards^[4].
• No beyond-use date. Every compounded sterile preparation gets a BUD under USP <797>^[2]. Its absence means you can't know when the vial is no longer safe.
• “Research use only” or “not for human consumption” labeling. This is the language of gray-market sellers, not a licensed pharmacy. See the research-peptide debunker.
• Cloudy, discolored, or particle-filled liquid (in a product that should be clear), a broken seal, or a vial that arrived warm when it should have been cold-shipped.
• No instructions and no way to reach the pharmacy. A legitimate provider gives you dosing instructions and a contact for questions.

Before your first dose

Compounded GLP-1 medications are not FDA-approved, and this guide is educational — it does not replace your pharmacy's labeled instructions or your prescriber's directions^[4]. Confirm the concentration on your specific vial, verify your dose, and never use a vial past its beyond-use date. If you are still choosing a source, start with vetted, licensed providers: our best compounded semaglutide providers and where to buy semaglutide safely. Not sure whether you even need a prescription or ID to order? See do you need an ID to buy a GLP-1 online.