Jun 25, 2026
16 MIN READ

Your Step-by-Step Guide on How to Do the Wegovy Shot with Confidence

Administering your own semaglutide injection at home is simpler than most patients expect. This guide walks you through preparation, injection site selection, needle insertion depth, and post-injection care to help you feel confident during your weight loss journey.

GLP-1 weight loss starts at $129/mo Provider-reviewed options. No membership fees.

See if you qualify →

Jun 25, 2026
16 MIN READ

your step-by-step guide on how to do the wegovy shot with confidence — PlexusDx GLP-1 education

Last reviewed: June 25, 2026

Last updated: June 25, 2026

Written by: Jay Hastings, CEO of PlexusDx

Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations. He has more than 20 years of experience across healthcare innovation, genomics, laboratory operations, healthcare investing, and strategic finance.

Medically reviewed by: Jayden Lee, PharmD, EMBA

Jayden Lee, PharmD, EMBA, is the PlexusDx Medical Science Liaison with a PharmD and MBA specializing in pharmacogenomics and clinical product development, with a proven ability to bridge the gap between genomic research and practical patient outcomes. Dr. Lee has more than 10 years of professional experience in clinical pharmacy, academia, and research.

This article is part of the PlexusDx Education Hub — science-backed guidance on GLP-1 medications, metabolic health, and precision weight management.

Injectable semaglutide works by slowing stomach emptying and signaling fullness to your brain, and most patients begin their first dose at 0.25mg weekly. Learning proper injection technique reduces anxiety and ensures you get the full therapeutic benefit from each dose. PlexusDx provides compounded semaglutide injections from licensed 503A pharmacies, starting at $149 per month, and this guide will help you master the process.

Preparing Your Semaglutide Injection at Home

Before you inject, gather all supplies in a clean, well-lit space: your semaglutide pen or vial, a sterile needle, alcohol swabs, and a sharps container. Remove your medication from the refrigerator 15 to 30 minutes before injection so it reaches room temperature—cold medicine can cause discomfort and may absorb more slowly. Check the liquid for clarity; it should be colorless to pale yellow with no particles or cloudiness.

Wash your hands thoroughly with soap and warm water, then pat dry completely. Inspect your injection pen or vial for any cracks, leaks, or damage; if you notice anything unusual, contact PlexusDx support before using it. Never use a pen or vial past its expiration date, and store all unused medication in the refrigerator between 36°F and 46°F.

Choosing the Right Injection Site and Technique

Semaglutide absorbs best through subcutaneous injection—meaning the needle enters the fatty tissue layer just under your skin, not into muscle. The ideal injection sites include your abdomen (avoiding the area two inches around your navel), your upper thigh, or the back of your upper arm. Rotate your injection site each week to prevent irritation, bruising, and lipohypertrophy, a thickening of fatty tissue that can develop with repeated injections in the same spot.

Pinch the skin gently at your chosen site to create a small fold, then insert the needle at a 90-degree angle with one quick motion. You should feel minimal resistance; if you hit muscle or bone, withdraw slowly and try another area. Push the plunger smoothly and steadily over 3 to 5 seconds, then wait 10 seconds before withdrawing the needle to allow the medication time to disperse into the tissue.

Managing Pain and Discomfort During Your Shot

Many patients worry that semaglutide injections will be painful, but most report only a slight pinch that lasts seconds. Using a brand-new needle for each injection and allowing your medication to reach room temperature both reduce discomfort significantly. If you are anxious about needles, taking a slow, deep breath while you count to three can help relax the muscles around your injection site.

Applying a thin coat of topical numbing cream (such as lidocaine) to the injection site 10 minutes before your shot can reduce sensation, though most patients find it unnecessary after their first few injections. Some people find it helpful to distract themselves by watching a video or listening to music during the injection. If you experience sharp pain or feel the needle touch bone, stop immediately, withdraw, and select a different area.

After Your Injection: Care and Monitoring

Once you have finished your injection, place the used needle immediately into a designated sharps container—never throw needles into the trash or toilet. You can purchase sharps containers at any pharmacy, or your PlexusDx provider can guide you toward safe disposal options in your area. Apply light pressure with a clean gauze pad or cotton ball if there is any bleeding, and cover the site with a bandage only if you prefer.

Mild redness, swelling, or a small bruise at the injection site is normal and typically fades within a few days. If you develop severe pain, persistent swelling, signs of infection (such as warmth, pus, or fever), or any reaction that concerns you, contact your PlexusDx healthcare provider right away. Continue your regular weekly schedule; missing or delaying doses may reduce the medication's appetite-suppressing effects and slow your progress toward your weight loss goals.

Personalizing Your Semaglutide Plan with Genetic Insights

PlexusDx offers the Precision Peptide Genetic Test—a peptide-pathway genetic assessment (not a pharmacogenomic test)—that examines key variants including GLP1R rs6923761 and GIPR rs1800437 to reveal how your genetics may influence your response to semaglutide. Understanding your genetic predispositions across 14 metabolic pathways and 150+ health insights can help you and your healthcare provider fine-tune your dose, adjust your nutrition plan, and set realistic expectations for your results. This test is available as a $99 add-on after your first month of treatment, making it easy to personalize your therapy from the start.

Some patients respond powerfully to lower doses of semaglutide based on their genetic profile, while others may benefit from reaching higher doses over time. The Precision Peptide Genetic Test helps eliminate guesswork and ensures your treatment strategy aligns with your biology—not just average patient outcomes. PlexusDx integrates these insights into your ongoing care plan so your healthcare provider can optimize your injection schedule and compound strength to match your unique peptide physiology.

How Your Genetics Influence GLP-1 Response

Not everyone responds to GLP-1 medications the same way. Genetic variants — including GIPR rs1800437, GLP1R rs6923761, FTO rs9939609, and MC4R rs17782313 — influence how your body processes these medications, how much weight you lose, and how you tolerate side effects. PlexusDx maps 14 pathways, 49 peptides, and 150+ genetic insights to match each patient to the right medication, dose, and lifestyle protocol for their biology. The PlexusDx Precision Peptide Genetic Test ($99 add-on after your first month of treatment) gives your provider precise insight into your peptide genetic predispositions before the first prescription is written.

Access Personalized GLP-1 Care Through PlexusDx

PlexusDx offers six prescription GLP-1 protocols to all 50 states — no membership, no insurance required, async intake or live consult. The Semaglutide Injection starts at $149/mo. Medications are dispensed from licensed 503A compounding pharmacies following strict quality and safety standards. Add a Precision Peptide Genetic Test for $99 to personalize your protocol from day one.

Frequently Asked Questions

How deep should the needle go when I inject semaglutide?

For subcutaneous injection, the needle should enter the fatty tissue layer just under your skin at a 90-degree angle—typically about ¼ to ½ inch deep. Most semaglutide needles are designed for this depth, so following the package instructions and using a pinched skin fold ensures proper placement. If you feel bone or sharp pain, withdraw and choose a different site.

Can I inject semaglutide in the same spot every week?

No; rotating your injection site each week is essential. Injecting repeatedly in the same area can cause lipohypertrophy (thickened fatty tissue) and may reduce medication absorption. Alternate between your abdomen, thighs, and upper arms to keep your skin healthy and maintain consistent drug delivery.

How much does semaglutide cost at PlexusDx?

PlexusDx compounded semaglutide injections start at $149 per month, with no insurance required and HSA/FSA eligibility. Your dose may need to go up as you progress through your weight loss journey, but your price remains flat—no hidden increases tied to dose level. All medications come from licensed 503A compounding pharmacies.

What should I do if I experience bruising or swelling after my injection?

Mild bruising and swelling are normal and usually fade within a few days. Apply light pressure with gauze immediately after injection, and avoid massaging the area. If swelling persists beyond a week, becomes severe, or shows signs of infection (warmth, pus, redness, or fever), contact your PlexusDx provider promptly.

Can the Precision Peptide Genetic Test help me predict how well semaglutide will work?

Yes; the Precision Peptide Genetic Test examines variants in GLP1R and other peptide pathways that influence how your body processes and responds to semaglutide. This $99 add-on test reveals genetic predispositions across 150+ health insights, helping your PlexusDx healthcare provider personalize your dose and treatment plan for optimal results.

Real prescribers. Published prices. No surprises.

Licensed providers in all 50 states. Online intake. No insurance, no membership required.

Start My Intake →

~60 seconds · $0 charged until your provider approves