Genetix Masteron Propionate 100mg
Drostanolone propionate · 100 mg/ml
$0.096 per mg
Genetix Masteron Propionate 100mg: Drostanolone propionate, 100 mg/ml, 10 ml vial. Ships from inside Canada in plain packaging, with tracking within 72 hours; free Canada Post shipping over $300.
- Compound
- Drostanolone propionate
- Strength
- 100 mg/ml
- Pack
- 10 ml vial
- Total per order
- 1,000 mg
- Half-life
- About 2 days
- Form
- Injectable oil
About Genetix Masteron Propionate 100mg
Drostanolone propionate is a DHT-derived steroid with a short ester. It was once prescribed (as Drolban or Masteron) for advanced breast cancer in women.
Genetix Pharma: Each order is one 10 ml vial at 100 mg/ml (1,000 mg in total).
Commonly used for
- Muscle hardness at low body fat
- Short-ester alternative to Masteron enanthate
Compound profile
- Formula
- C23H36O3
- Molecular weight
- 360.5 g/mol
- CAS number
- 521-12-0
- PubChem
- CID 224004
How it works
It binds androgen receptors, does not convert to estrogen and has a mild anti-estrogenic effect. It suppresses natural testosterone.
Half-life: about 2 days.
Release profile
How levels rise and fall after a single dose, based on a half-life of about 2 days. Each mark on the axis is one half-life; after about five, almost none is left.
An illustration from the half-life only; real levels vary with dose, injection site and the person.
Clinical reference dose
Clinical reference: the old breast-cancer label used 100 mg three times a week in women. It is no longer marketed for any medical use in Canada.
At 100 mg per ml. Measure oil with a 1 ml or 3 ml syringe marked in 0.1 ml steps.
Men who use it for physique goals are outside any studied use.
These are reference amounts from labels and clinical studies, not a personal recommendation. A doctor sets the right dose for you, using your bloodwork.
Measuring calculator
Enter the amount you have been prescribed or are working from, and this works out exactly what to measure from this product. It doesn’t suggest an amount.
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Arithmetic only, from the strength on this product’s label. Check the label on your vial or bottle, follow your prescriber, and ask a pharmacist if you’re unsure how to measure.
Injection sites
Masteron Propionate 100mg is an oil-based injection made for intramuscular (IM) use: deep into a large muscle, not under the skin and never into a vein. Like every injectable we sell, it is made in MCT oil (medium-chain triglycerides), a lighter, thinner oil than the grapeseed or cottonseed oil many labs use, so it draws up and pushes through a 25G needle more easily.
- Muscle
- Gluteus medius and minimus
- Group
- Glutes · hip abductors
- Volume (nursing reference)
- Up to 3 ml per site
- Needle
- 25–38 mm (1–1.5 in), 22–25G
Finding it. Put the heel of your hand on the bony point at the top of the outer thigh (greater trochanter), index finger on the front hip bone (anterior superior iliac spine) and spread the middle finger back along the hip crest. The injection goes in the middle of the V between those two fingers.
Why people choose it. Nursing guidance now treats this as the preferred deep-muscle site for adults: thick muscle, a thin and predictable fat layer, and no major nerves or blood vessels in the target zone.
Watch out. Takes practice to find the landmarks on yourself; use a mirror or have someone help the first few times.
- Muscle
- Vastus lateralis
- Group
- Quadriceps · front of thigh
- Volume (nursing reference)
- Up to 3 ml per site
- Needle
- 25–38 mm (1–1.5 in), 22–25G
Finding it. Split the thigh between the hip and the knee into thirds; use the middle third, on the outer side of the front of the thigh.
Why people choose it. The easiest large muscle to reach and see when injecting yourself, seated, with good muscle bulk and well away from the major nerves and vessels.
Watch out. Stay on the outer side: the femoral nerve, artery and vein run along the inner front of the thigh. Some people feel it when walking for a day or two.
- Muscle
- Deltoid
- Group
- Shoulder
- Volume (nursing reference)
- Up to 1 ml per site
- Needle
- 25 mm (1 in), 23–25G
Finding it. Find the bony tip of the shoulder (acromion); the site is the thickest part of the muscle about 2.5–5 cm (2–3 finger widths) below it, centred on the side of the arm.
Why people choose it. Quick to reach and easy to expose, which is why vaccines go here. Good for small volumes.
Watch out. A small muscle: larger volumes hurt and can leak back. The axillary and radial nerves run below the safe zone, so do not go low on the arm.
- Muscle
- Gluteus maximus
- Group
- Glutes · buttock
- Volume (nursing reference)
- Up to 3 ml per site
- Needle
- 38 mm (1.5 in)
Finding it. The traditional "upper outer quarter of the buttock".
Why people choose it. Large muscle and familiar, so many older guides still show it.
Watch out. Most nursing guidance has moved away from it: the sciatic nerve and superior gluteal artery are close by, and the fat layer is thicker, so the oil may not reach the muscle. The ventrogluteal site gives the same glute muscle mass with less risk.
Why these sites for Masteron Propionate 100mg
Intramuscular (IM)- Biggest muscles first. Short-ester oils (propionate, acetate, phenylpropionate) are the ones most often reported to sting and leave the muscle sore. People lean towards the largest muscles, ventrogluteal and outer thigh, and keep the deltoid for small volumes.
- Rotate more. Short esters clear quickly, so they are injected more often than long esters. More injections means rotating across more sites, left and right, so each one fully settles before it is used again.
- Warm MCT oil flows best. Rolling the vial between your hands for a minute brings the oil to body temperature so it pushes more smoothly. Never heat it in water or a microwave.
Every time: wash your hands, wipe the vial top and the skin with alcohol and let it dry, use a new sterile needle and syringe, and never share. Get medical help for spreading redness, heat, swelling, pus, fever, numbness or pain that keeps getting worse. This is general reference information from standard nursing injection guidance, not medical advice; a pharmacist or nurse can show you the technique in person.
Compare brands
Same compound, different makers. Compare the strength, pack and cost per unit.
| Product | Strength | Pack | Price | Value | Buy |
|---|---|---|---|---|---|
| Genetix Masteron Propionate 100mgYou are here | 100 mg/ml | 10 ml vial | $96 | $0.096 per mg | |
 Zionova Masteron Propionate 100mg★ 5.00 · 1 | 100 mg/ml | 10 ml vial | $96 | $0.096 per mg | Add |
Combinations and interactions
Often compared or used with
- Compared with Masteron enanthate (longer ester, fewer injections).
- Used with testosterone because it suppresses natural production.
Interactions to know
- Warfarin: INR can rise.
Tell your doctor and pharmacist about everything you take, including supplements, before adding anything new.
Side effects and risks
Hair loss
Speeds male-pattern baldness.
Lipids
Lower HDL cholesterol.
Prostate and acne
DHT-type effects on the prostate and skin.
Injection pain
Short esters can make injection sites sore.
Injection safety
Use a new sterile needle and syringe every time, wipe the stopper and skin with alcohol, and never share. Redness, heat or swelling that gets worse after a day or two can mean infection and needs a doctor.
Are under 18, have prostate problems or heart disease. Women risk voice deepening and other permanent changes.
In Canada: Anabolic steroids are Schedule IV substances under the Controlled Drugs and Substances Act. Possessing them for personal use isn’t an offence; trafficking, importing and exporting without authorization are.
Bloodwork checklist
- Complete blood count (hematocrit, hemoglobin)
- Lipid panel (HDL, LDL, triglycerides)
- Liver enzymes (ALT, AST)
- Kidney function (creatinine, eGFR)
- Testosterone, sensitive estradiol, LH and FSH
- PSA if you are over 40
- Blood pressure at home, weekly
Your family doctor can order these, or you can pay for private testing at labs such as LifeLabs or Dynacare. Test before you start, after 6–8 weeks, and again after you stop.
Common questions
How often is it injected?
Its half-life is about 2 days, so every other day is typical.
How fast does it ship?
Orders ship from inside Canada with a tracking number within 72 hours of payment. Weekend orders are packed on Sunday or Monday. Canada Post Xpresspost takes 2–5 business days to most cities; UPS or FedEx is faster. Shipping is free by Canada Post over $300 and by UPS or FedEx over $1,000.
How is it packaged?
In a plain box with no product names or branding on the outside.
Is drostanolone propionate legal in Canada?
Anabolic steroids are Schedule IV substances under the Controlled Drugs and Substances Act. Possessing them for personal use isn’t an offence; trafficking, importing and exporting without authorization are.
Sources
- Treatment of advanced breast carcinoma with drostanolone propionate. A case reportHeney NM · Bristol Med Chir J · 1970 · PMID 5536155
- Anabolic-androgenic steroids: How do they work and what are the risks?Bond P et al. · Front Endocrinol (Lausanne) · 2022 · PMID 36644692
Chemical data and structures: PubChem, U.S. National Library of Medicine. Protein sequences: UniProt.
Specifications
| Compound | Drostanolone propionate |
|---|---|
| Strength | 100 mg/ml |
| Pack | 10 ml vial |
| Total per order | 1,000 mg |
| Half-life | About 2 days |
| Form | Injectable oil |
| Brand | Genetix Pharma |
| SKU | Masteron Propionate Genetix Pharma |
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This information is educational and is not medical advice. Talk to a doctor or pharmacist before using any hormone, peptide or prescription drug. For adults 18+ only.