2D structure · PubChem CID 441404Testosterone cypionate

Genetix PharmaInjectable

Testosterone Cypionate Genetix Pharma

Testosterone cypionate · Injectable (oil)

5.0 from 2 reviews

$96CAD

In stock, ships from Vancouver

Strength250 mg/ml

Pack10 ml vial

Total per order2,500 mg

Half-life≈ 5-8 days

Add $204 more for free Xpresspost.

You will need to inject it

Syringes Pack of 10 - 25 Gauge - 3ml$18Add

Delivery guaranteeLost or seized: reshipped free
Tracking in 72 hPacked in Vancouver
Interace-TransferFrom any Canadian bank
Plain packagingNo product names outside

Overview

Testosterone cypionate pairs testosterone with an eight-carbon ester that releases it over roughly a week. It is the version of testosterone most often written on prescriptions in Canada and the United States.

How it works

Once the ester is removed, the body treats it exactly like its own testosterone: it binds androgen receptors, increases red blood cell production and partly converts to estradiol and DHT, while the brain turns down natural production.

Chemistry

From PubChem, the US National Library of Medicine’s chemistry database.

Testosterone cypionate

Formula: C₂₇H₄₀O₃
Molecular weight: 412.6 g/mol
CAS: 58-20-8
PubChem CID: 441404 ↗

Clinical reference

Labels for testosterone cypionate list 50 to 400 mg every two to four weeks for men with low testosterone. In current practice most physicians prescribe about 75 to 100 mg once a week, or half that twice a week, and adjust from bloodwork.

Label and guideline amounts are shown for reference only. They are not a recommendation, and we never give cycle or performance amounts. Any use belongs under a doctor’s care, with bloodwork.

Measuring calculator

Converts an amount you enter into what to measure. It does not suggest an amount.

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Strength used: 250 mg/ml

Injection sites

Testosterone Cypionate is an oil for intramuscular (IM) injection: deep into a large muscle, never under the skin or into a vein. Our injectables are made in MCT oil, which is thinner than the seed oils many labs use, so it draws and flows through a 25G needle more easily.

Commonly usedOlder site, use cautionAnatomy drawing: OpenStax & Tomáš Kebert, umimeto.org, CC BY-SA 4.0, recoloured.

Volume per site: Up to 3 ml
Needle: 25 to 38 mm, 22 to 25G

**Locating the ventrogluteal site**Concordia University Ann Arbor · School of Nursing · YouTube, plays here when clicked

Finding it. Place the heel of your hand on the bony bump at the top of the outer thigh, point your index finger at the front hip bone and spread your middle finger back along the hip crest. Inject in the centre of the V between the two fingers.

Why it is used. Current nursing guidance favours it for adults: a thick muscle under a thin, predictable fat layer, with no large nerves or vessels in the target area.

Watch out. The landmarks take practice; use a mirror or a helper the first few times.

Why these sites for Testosterone Cypionate

Intramuscular (IM)

Three common sites. Long-ester oils are usually smooth, so the ventrogluteal, outer thigh and deltoid all work; the deltoid only for small volumes.
Rotate. Reusing a spot before it settles causes lumps and scar tissue. Rotate between at least four spots.
Warm the vial in your hands. Rolling the vial for a minute brings the oil to body temperature so it flows easily. Never heat it in water or a microwave.

Every time: wash your hands, wipe the vial stopper and skin with alcohol, use a new sterile needle and syringe, and never share. See a doctor for spreading redness, heat, swelling, pus, fever or numbness. This is general guidance from standard nursing practice, not medical advice; a pharmacist or nurse can show you in person.

Combinations and interactions

Prescribed or used alongside

Testosterone enanthate can be swapped one-for-one in clinical use.
hCG is used with testosterone therapy when fertility matters.
Adding a second anabolic compound stacks the strain on blood pressure, cholesterol and hematocrit; bloodwork should come first.

Drug interactions

Warfarin and other anticoagulants: INR can rise.
Diabetes medicines: lower blood sugar is possible.
Corticosteroids: extra fluid retention.

Risks and bloodwork

Natural production stops

The testes shrink and sperm production falls while you use it, and may take months to return.

High hematocrit

A thicker blood count raises clot and stroke risk; doctors check it every few months.

Cardiovascular strain

Higher blood pressure and lower HDL cholesterol, worse at larger amounts.

Gynecomastia and water

Conversion to estradiol can cause fluid retention and breast tissue growth.

Acne and hair loss

Common, and hair loss is faster in men prone to male-pattern baldness.

Bloodwork doctors check

Complete blood count (hematocrit and hemoglobin)
Lipid panel (HDL, LDL, triglycerides)
Liver enzymes (ALT, AST)
Total and free testosterone, estradiol
LH and FSH
PSA for men over 40
Blood pressure

Not for

People under 18, anyone pregnant or breastfeeding, and anyone with prostate or breast cancer, heart disease, uncontrolled blood pressure, a high red blood cell count, untreated sleep apnea, or liver or kidney disease.

Canadian legal status

Anabolic steroids are listed in Schedule IV of the Controlled Drugs and Substances Act. Simple possession of a Schedule IV substance is not an offence under the Act; selling, importing or exporting one without authorisation is. Sports bodies that follow the World Anti-Doping Code ban them in and out of competition. This is general information, not legal advice.

References

Testosterone Therapy in Men With Hypogonadism: An Endocrine Society Clinical Practice GuidelineBhasin S et al. · J Clin Endocrinol Metab, 2018 · PMID 29562364
The effects of supraphysiologic doses of testosterone on muscle size and strength in normal menBhasin S et al. · N Engl J Med, 1996 · PMID 8637535
Testosterone therapy and secondary erythrocytosisWhite J et al. · Int J Impot Res, 2022 · PMID 34987178
Recovery of spermatogenesis following testosterone replacement therapy or anabolic-androgenic steroid useMcBride JA, Coward RM · Asian J Androl, 2016 · PMID 26908067

Reviews

5.02 reviews from customers

Reviews are published after a quick check. Only customers who bought this product can review it.

Matthew L.Verified buyerApr 28, 2025

Rated without a written review.

Reply from SteroidsCanada.org

Matthew, thank you for the five stars on the testosterone cypionate!

BradVerified buyerMar 26, 2024

Rated without a written review.

Reply from SteroidsCanada.org

Thanks, Brad! We appreciate the rating on your testosterone cypionate.

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FAQ

Why is cypionate the common prescription form?

It was the version approved and marketed first in North America, so doctors and pharmacies are most familiar with it.

Can it be injected weekly?

Yes. Weekly or twice-weekly injection gives steadier levels than the old every-two-weeks schedule.

Does it need refrigeration?

No. Store it at room temperature away from light.

How fast will it arrive?

Orders ship from Vancouver by Canada Post Xpresspost. You get a tracking number within 72 hours of payment; delivery then takes 1 to 2 business days in BC, 3 to 4 in Ontario and 3 to 5 in Quebec.

What if my parcel is lost or seized?

We reship it free. Contact us with your order number.

Adults 18+. This page is general information, not medical advice. Talk to a licensed healthcare provider before using any compound.