Primobolan 100 mg is an oil-based Methenolone Enanthate injectable manufactured by Dragon Pharma and dosed at 100 mg/mL in a 10 mL vial.
Primobolan 100 mg contains methenolone enanthate, a synthetic anabolic-androgenic steroid derived from dihydrotestosterone (DHT) . Methenolone was first described in 1960, and Squibb Company began producing the injectable drug in 1962 . It was originally prescribed for muscle loss after operations, infections, long-term illnesses, aggressive corticoid therapy, or malnutrition, and in some cases to treat osteoporosis and breast cancer. The enanthate ester extends the activity of the drug, with a biological half-life of approximately 10.5 days, allowing for less frequent administration compared to oral methenolone acetate.
In clinical practice, methenolone has been used for conditions including aplastic anemia, with adult doses typically in the range of 1–3 mg/kg per day. It was commonly used to promote weight gain in infants weighing less than normal. In non-medical bodybuilding contexts, Primobolan 100 mg is commonly referenced for its ability to support lean muscle preservation during caloric deficits, enhanced nitrogen retention, and gradual body recomposition without significant water retention or estrogenic side effects.
Methenolone is notable for its weak androgenic activity and moderate anabolic effect . It binds firmly to androgen receptors, stronger than testosterone . A key characteristic is that methenolone does not aromatize into estrogen, which mitigates estrogen-related side effects such as gynecomastia and significant water retention. This trait makes it particularly valued during contest preparation and cutting phases where a dry, hard look is desired.
Primobolan 100 mg uses MCT oil as its carrier, providing an oil base for the methenolone enanthate formulation. The 100 mg/mL concentration is the standard strength for this compound.
Methenolone enanthate is a long-acting DHT-derived anabolic steroid with a mild anabolic profile and low androgenic activity. Its defining characteristic is the absence of aromatization, making it particularly suited for cutting and lean-mass applications.
Methenolone is a structural derivative of dihydrotestosterone, modified with a methyl group at the C1 position . It is not a 17-alpha-alkylated compound, which is associated with reduced hepatotoxicity compared to oral C17-alpha-alkylated steroids. The enanthate ester attached to the 17-beta hydroxyl group slows the release of methenolone from the injection site, producing a half-life of approximately 10.5 days.
Methenolone binds to and activates the androgen receptor, initiating genomic signaling that promotes protein synthesis and nitrogen retention in muscle cells. It also exhibits anti-catabolic properties by inhibiting glucocorticoid hormones that promote muscle protein breakdown.
Methenolone has an anabolic rating of approximately 88 and an androgenic rating in the range of 44-57, compared to testosterone's baseline of 100:100. This favorable anabolic-to-androgenic ratio contributes to its reputation as a “mild” compound with fewer visible side effects than more potent androgens.
The enanthate ester of Primobolan 100 mg produces a longer duration of action than oral methenolone acetate, with a half-life of approximately 10.5 days. In non-medical contexts, this allows for injections once or twice per week, though some users prefer more frequent administration for stable blood levels. The long ester means that effects build gradually over several weeks, with noticeable changes in recovery and muscle fullness typically reported after 4-6 weeks of use.
Dragon Pharma offers a higher-concentration version of this compound, Primobolan 200, which provides 200 mg/mL methenolone enanthate for users who prefer reduced injection volumes. For those seeking a non-aromatizing oral option during cutting phases, Anavar 10 is commonly referenced in bodybuilding contexts.
Primobolan is frequently combined with other compounds in non-medical cutting cycles. A testosterone base such as Cypionate 250 is commonly referenced . DHT-derived compounds such as Masteron 100 are also sometimes stacked with Primobolan for enhanced hardening effects, though both compounds can be harsh on hair and skin.
Published laboratory reports for Primobolan 100 mg are shown below with the test date, measured concentration and percentage of the product's 100 mg/mL label claim.
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Laboratory results apply to the specific tested sample represented in each published report and should not be interpreted as a measurement of every vial or production batch.
The information below is provided for educational reference only. Methenolone enanthate is a prescription medication in some countries; medical use requires appropriate diagnosis, clinical supervision and ongoing monitoring. Non-medical use falls outside approved indications.
In non-medical bodybuilding contexts, Primobolan 100 mg is commonly referenced in the range of 400–600 mg per week for general use, with some experienced users referencing up to 800 mg per week . Because of its long enanthate ester, the weekly total is typically divided into injections administered once or twice per week. The 100 mg/mL concentration means that 1 mL provides 100 mg of methenolone enanthate.
| Use Case | Common Reference Range | Injection Frequency |
|---|---|---|
| Beginner (non-medical) | 300–400 mg / week | Once or twice weekly |
| Intermediate (non-medical) | 400–600 mg / week | Twice weekly |
| Advanced (non-medical) | 600–800 mg / week | Twice weekly |
In non-medical bodybuilding contexts, Primobolan is most commonly referenced as a cutting or pre-contest compound. It is frequently stacked with a testosterone base, which provides the anabolic foundation and maintains normal physiological function. Dragon Pharma's Cypionate 250 or Enantat 250 are commonly mentioned in this context .
Primobolan is also sometimes stacked with other non-aromatizing compounds for enhanced hardening effects. Cycle lengths of 8–12 weeks are commonly referenced in non-medical contexts . Because methenolone suppresses endogenous testosterone production, PCT is typically recommended after a cycle.
Methenolone is generally considered to have a milder side effect profile compared to other anabolic steroids. However, it is not devoid of adverse effects. It can cause alterations in lipid profiles, including a decrease in HDL cholesterol and an increase in LDL cholesterol, which may increase cardiovascular risk. Blood pressure may also be mildly affected.
As a DHT derivative, methenolone can cause androgenic side effects such as acne and hair loss in predisposed individuals. In women, virilization symptoms are possible, though the risk is lower than with more androgenic compounds. Endogenous testosterone suppression is a recognized effect of all anabolic steroids, including methenolone.
After completing a cycle with Primobolan 100 mg, post-cycle therapy is commonly recommended in non-medical contexts to help restore endogenous testosterone production. Because of the long enanthate ester, PCT should begin approximately 10–14 days after the final injection to allow the ester to clear. Agents such as Clomid or Nolvadex are frequently referenced for this purpose. Bloodwork and, where possible, medical guidance can help inform recovery strategy.
Dosing strategies, support compounds and recovery protocols should be adjusted based on experience level and bloodwork where possible. The information above is for educational reference and does not constitute medical advice.
Methenolone enanthate is a synthetic anabolic steroid that can affect cardiovascular, endocrine and reproductive function. It is banned from use in sports governed by the World Anti-Doping Agency.
Methenolone was originally prescribed for muscle loss after operations, infections, long-term illnesses, and malnutrition, as well as for osteoporosis and breast cancer. It is banned from use in sports by WADA, the NBA, and other athletic organizations. Non-medical use for bodybuilding or performance enhancement falls outside approved indications and may carry significant health risks.
Use of methenolone enanthate for bodybuilding or performance enhancement falls outside approved medical indications. Higher-than-physiologic exposure can increase the risk of serious adverse effects including cardiovascular, hepatic and endocrine complications.
Methenolone can cause fluid and electrolyte retention, hypercalcaemia, increased bone growth and skeletal weight. In men, additional potential effects include priapism, azoospermia, hirsutism, male pattern baldness, acne, and oedema. In women, side effects include virilization, amenorrhoea, menstrual irregularities, suppressed lactation, and increased libido. In children, virilization symptoms may occur.
Alterations in lipid profiles are a recognized concern with methenolone. It can lead to a decrease in HDL cholesterol and an increase in LDL cholesterol, which may increase the risk of cardiovascular issues. Experimental data indicates that anabolic steroids generally can decrease HDL cholesterol by 20% to 70% and increase LDL cholesterol by approximately 36% to over 100%.
Methenolone suppresses endogenous testosterone production through hypothalamic-pituitary-gonadal axis disruption. This suppression occurs regardless of the compound's perceived mildness.
Methenolone enanthate may interact with antidiabetics, ciclosporin, levothyroxine, and warfarin. Resistance to the effects of neuromuscular blockers may occur, and methenolone has the potential to interfere with glucose tolerance and thyroid function tests. Existing medical conditions and concurrent medications should be discussed with a qualified healthcare professional before methenolone is considered.
If methenolone enanthate is used in any context, monitoring of lipid profiles, blood pressure, and liver function is important . In non-medical bodybuilding contexts, bloodwork before, during, and after a cycle is commonly referenced as a risk-reduction strategy. Laboratory testing of the product itself, such as the published potency reports shown in the Lab Reports tab, is separate from clinical monitoring of the person using the medication.
Keep the vial securely stored and protected from conditions that could compromise the product or container. Store at controlled room temperature and protect from light and moisture. Inspect the vial and solution before use and do not use a product that appears damaged, contaminated or otherwise abnormal.
Keep all medications and injectable products out of the reach of children. Follow the storage instructions provided with the product packaging.
Primobolan 100 mg by Dragon Pharma is shipped in original manufacturer packaging with discreet, privacy-focused handling.
The outer shipping package remains discreet, with privacy-focused handling and no unnecessary external product details.
To verify your Primobolan 100 mg product, use the security code on the vial label and cross-check it on the Dragon Pharma official site. Original Dragon Pharma packaging and batch-linked lab proof help reinforce product legitimacy. Given that fake Primobolan is known to circulate in the market, laboratory verification is particularly valuable for this compound.
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Proper storage conditions help preserve formulation stability and overall product integrity throughout shelf life.
Store at controlled room temperature (15–25°C) and protect from excessive heat, moisture, and direct light. Maintaining stable conditions helps preserve the integrity of the oily formulation.
Keep the vial in its original packaging until use. Do not freeze. Before administration, inspect the solution and avoid use if it appears cloudy, discolored, contains particulate matter, or if the vial or seal is compromised.
Keep out of reach of children. Follow proper handling and sterile injection practices when administering the product.
Answers to common questions about Primobolan 100 mg, methenolone enanthate, usage considerations, product strength and laboratory testing.
Primobolan 100 mg contains methenolone enanthate, which was originally prescribed for muscle loss after operations, infections, long-term illnesses, and malnutrition, as well as for osteoporosis and breast cancer. In non-medical bodybuilding settings, Primobolan 100 mg is commonly referenced for lean muscle preservation during caloric deficits and gradual body recomposition, though such use falls outside approved medical indications.
Because of its long enanthate ester and approximately 10.5-day half-life, methenolone enanthate is typically referenced as being administered once or twice per week in non-medical contexts. The 100 mg/mL concentration means that 1 mL provides 100 mg of methenolone enanthate.
In non-medical bodybuilding contexts, post-cycle therapy is commonly recommended after a methenolone cycle to help restore endogenous testosterone production. Methenolone suppresses the hypothalamic-pituitary-gonadal axis, leading to a reduction in endogenous testosterone production. Because of the long ester, PCT should begin approximately 10–14 days after the final injection. Agents such as Clomid or Nolvadex are commonly referenced for this purpose.
Methenolone enanthate binds to and activates the androgen receptor, initiating genomic signaling that promotes protein synthesis and nitrogen retention in muscle cells. It also exhibits anti-catabolic properties by inhibiting glucocorticoid hormones that promote muscle protein breakdown. Unlike testosterone, methenolone does not aromatize into estrogen.
Because of its long enanthate ester, methenolone enanthate releases gradually over several weeks. In non-medical contexts, users commonly reference noticing effects on recovery and muscle fullness after approximately 4-6 weeks of use. The compound is known for producing gradual, subtle changes rather than rapid transformations.
There is no single compound that is universally best for cutting. Primobolan 100 mg is commonly referenced in bodybuilding contexts for its ability to support lean muscle preservation during caloric deficits without water retention or estrogenic side effects. Other products such as Anavar 10 and Masteron 100 are also referenced for cutting purposes.
The primary difference is concentration. Primobolan 100 mg provides 100 mg of methenolone enanthate per mL, while Primobolan 200 provides 200 mg/mL. Higher-concentration products allow for reduced injection volume at equivalent doses, though methenolone enanthate is known to be more difficult to dissolve at higher concentrations compared to testosterone esters.
Primobolan 100 mg contains methenolone enanthate, an injectable DHT-derived anabolic steroid. Anavar 10 contains oxandrolone, an oral anabolic steroid. Both are commonly referenced for cutting and lean-mass applications, but they have different administration routes and pharmacokinetic properties. Both are also subject to counterfeiting in the market.
A milligram amount cannot be classified as appropriate or excessive without considering the specific context, individual response, and other factors. In non-medical bodybuilding contexts, methenolone enanthate is commonly referenced in the 400–600 mg per week range, divided into injections once or twice per week . Such use falls outside approved indications.
Primobolan 100 mg is labeled at 100 mg of methenolone enanthate per mL. It is supplied in a 10 mL vial, giving 1,000 mg of total labeled methenolone enanthate content per vial.
Yes. A published laboratory report dated August 24, 2026 measured Primobolan 100 mg at 100.57 mg, equivalent to 100.57% of its 100 mg/mL label claim.
The complete report can be viewed in the Lab Reports tab. Laboratory results apply to the tested sample represented by the individual report and should not be interpreted as a measurement of every vial.
Yes. Primobolan is one of the most commonly counterfeited anabolic steroids in the market, with fake products containing other DHT derivatives or underdosed compounds being reported. Laboratory testing, such as the reports published for Primobolan 100 mg, is particularly valuable for verifying product authenticity and potency.