How to Inject Peptides: A Step-by-Step Subcutaneous Injection Guide

Before you begin, make sure you have the following supplies ready. Your PeRx shipment includes everything except a sharps container, which is available at any pharmacy.

Included in your PeRx kit: - Your prescribed peptide vial (ready-to-use) - Insulin syringes (typically 29–31 gauge, ½ inch needle) - Alcohol swabs

You'll also need: - A clean, flat workspace - A sharps disposal container (any FDA-cleared container, or a thick-walled plastic container with a lid) - Optional: a small bandage or cotton ball

Important: Never reuse needles or syringes. Use a fresh, sealed syringe for every injection.

Wash your hands thoroughly with soap and warm water for at least 20 seconds. Dry with a clean towel or paper towel.

Why this matters: Hand-washing is the single most effective way to prevent infection at the injection site. Even if your hands look clean, bacteria on the skin surface can be introduced through the needle.

Choose a clean, well-lit, flat surface — a kitchen counter or bathroom vanity works well. Lay out your supplies so everything is within easy reach:

- Peptide vial - Fresh syringe (still sealed) - Alcohol swabs - Sharps container nearby

Tip: Avoid injecting in a rush or in a distracting environment. A calm, focused setup reduces errors and makes the process much easier — especially in the first few weeks.

Take an alcohol swab and wipe the rubber stopper on top of your peptide vial. Use a firm, circular motion and let it air-dry for a few seconds.

Why this matters: The rubber stopper is a potential entry point for bacteria. Cleaning it before every draw ensures the medication stays sterile.

Note: PeRx ships all peptides fully reconstituted and ready to use. Simply store your vial refrigerated (36–46°F) until you’re ready to inject.

Pull back the plunger to draw air into the syringe equal to your prescribed dose. For example, if your dose is 0.2 mL, pull the plunger back to the 0.2 mL (or 20-unit) mark.

Insert the needle into the center of the rubber stopper and push the air into the vial. This replaces the volume you're about to remove and makes drawing easier.

Invert the vial so the needle tip is submerged in the liquid. Slowly pull the plunger back to your prescribed dose. Draw slightly past your dose line.

Remove air bubbles: While the needle is still in the vial, tap the syringe barrel gently with your fingertip to move any air bubbles to the top. Push the plunger slowly until the bubbles are expelled and the dose reads exactly at your prescribed mark.

Remove the needle from the vial. Do not set the syringe down or let the needle touch any surface.

Dose accuracy matters: Always double-check you've drawn the correct amount. If you're unsure about your prescribed dose, contact your PeRx provider before injecting.

Subcutaneous (subQ) injections are administered into the fatty tissue just beneath the skin. The two most common sites are:

Abdomen — The preferred site for most patients. Choose an area at least 2 inches away from your belly button. Avoid the belt line and any areas with scars, moles, or bruising.

Upper thigh — The outer middle third of the thigh. A good alternative if you prefer not to use the abdomen, or if you need to rotate away from a recent abdominal site.

Site rotation is essential. Alternate between left and right sides, and vary your exact spot within each region. Repeated injections in the same spot can cause tissue hardening (lipodystrophy), which reduces absorption and can be uncomfortable.

Clean the site: Wipe the chosen injection area with a fresh alcohol swab in a circular motion, moving outward. Let it air-dry completely — injecting into wet alcohol can sting.

Pinch the skin. Using your non-dominant hand, gently pinch a fold of skin (about 1–2 inches) at your cleaned injection site. This lifts the fatty tissue away from the muscle beneath.

Insert the needle. Hold the syringe like a dart in your dominant hand. Insert the needle at a 45- to 90-degree angle into the pinched skin fold. For most insulin-length needles (½ inch), a 90-degree angle is fine. If you're very lean, use a 45-degree angle to stay in the subcutaneous layer.

Push the plunger slowly. Inject the medication at a slow, steady pace — about 5 to 10 seconds for a typical dose. Rushing can cause discomfort and may reduce absorption.

Hold briefly. After the plunger is fully depressed, hold the needle in place for 5–10 seconds before withdrawing. This helps ensure the full dose is delivered and minimizes leakage.

Withdraw and release. Pull the needle straight out and release the skin pinch. Do not rub the injection site.

Tip: If you see a small drop of blood or medication at the surface, that's normal. Apply gentle pressure with a cotton ball or bandage for a few seconds.

Dispose of the syringe immediately. Place the used syringe — needle-first — directly into your sharps container. Do not recap the needle, bend it, or throw it in the regular trash.

Apply gentle pressure to the injection site with a cotton ball or clean finger if needed. A small bandage is optional.

Log your injection. Use the PeRx injection logger in your patient dashboard to record the date, time, site, and any notes. Consistent tracking helps your provider optimize your protocol and ensures proper site rotation.

Sharps disposal: When your sharps container is about three-quarters full, seal it and dispose of it according to your local regulations. Many pharmacies accept full sharps containers for free. You can also use a mail-back program — your provider can recommend one.

PeRx ships all peptides fully reconstituted and ready to use. Store your vial in the refrigerator (36–46°F / 2–8°C). Do not freeze. Most peptides remain stable for 28 days when properly refrigerated — check your specific peptide’s instructions.

Protect from light. Keep vials in their original box or a dark area of the refrigerator. UV exposure can degrade peptides over time.

Inspect before use. Check the solution before each injection. It should be clear and colorless. Do not use if the solution appears cloudy, discolored, or contains particles.

Never share vials, syringes, or needles — even between household members using the same peptide. Each patient should have their own clearly labeled supplies.

Most subcutaneous injections are straightforward, but contact your PeRx provider if you experience any of the following:

At the injection site: - Redness, swelling, or warmth that increases over 24–48 hours - A hard lump that doesn't resolve within a few days - Signs of infection: pus, spreading redness, or red streaks

Systemic reactions: - Unusual dizziness, nausea, or lightheadedness after injection - Rash, hives, or itching away from the injection site - Difficulty breathing or swelling of the face/throat (seek emergency care immediately)

Dose concerns: - You're unsure whether you administered the correct dose - You accidentally injected into muscle instead of subcutaneous tissue - You missed a scheduled dose and aren't sure how to adjust

Remember: Your PeRx provider is available via your patient dashboard messaging. When in doubt, reach out — no question is too small.