Dragon Pharma Undecanoate
Testosterone Undecanoate 250 mg is the definitive choice for athletes and individuals seeking the longest-acting, most stable form of injectable testosterone available. This product features testosterone attached to the Undecanoate ester, which boasts an exceptionally long half-life of approximately 16.5 days—more than double that of Testosterone Enanthate or Cypionate. With a concentration of 250 mg/mL in a smooth MCT oil base, this formulation is engineered to provide remarkably steady blood levels with the least frequent injection schedule of any testosterone ester. A single injection can maintain elevated testosterone levels for up to three weeks, making it the ideal foundation for long-term testosterone replacement therapy (TRT), extended cycling, or for bodybuilders who wish to minimize their injection frequency without compromising hormonal stability.
Manufactured under strict pharmaceutical standards in Dragon Pharma's European facilities, Testosterone Undecanoate offers a unique pharmacokinetic profile. The long ester chain slows the release of testosterone into the bloodstream, creating a gentle, sustained rise to peak levels over 7-10 days followed by a very gradual decline. This eliminates the sharp peaks and troughs associated with shorter esters, potentially leading to fewer estrogen-related side effects like mood swings, water retention, and acne for many users. While it takes longer to reach full saturation (up to 8-10 weeks), the resulting stability is unparalleled. It is perfect for those who travel, have busy schedules, or simply prefer not to pin multiple times per week. Whether used for legitimate TRT under medical guidance or as the backbone of a long, steady anabolic cycle, Dragon Pharma Undecanoate 250 delivers consistent, reliable results.
Key Benefits:
- Ultra-Long Half-Life (~16.5 Days): Provides the most stable testosterone blood levels available, minimizing hormonal fluctuations and potentially reducing associated side effects.
- Minimal Injection Frequency: Effective dosing can be achieved with injections just once every 7-14 days (or even longer for TRT), reducing injection site trauma and improving lifestyle convenience.
- Superior Stability for Long Cycles & TRT: The gradual release profile is ideal for cycles lasting 14+ weeks or for long-term therapeutic use, providing a consistent anabolic environment.
- Smooth Estrogen Management: Steady hormone levels often lead to more predictable and manageable estrogen conversion, making it easier to dial in your Aromatase Inhibitor (AI) dosage.
- Ideal for Stacking with Long-Acting Compounds: Pairs perfectly with other long-ester steroids like Deca 300 (Nandrolone Decanoate) or EQ 500 (Boldenone Undecanoate) for synergistic, low-maintenance cycles.
Each 10 mL vial contains 2500 mg of pharmaceutical-grade Testosterone Undecanoate, manufactured under strict quality control standards in Dragon Pharma's certified facilities for unparalleled reliability.
Product Specifications
| Product Name |
Undecanoate 250 |
| Manufacturer |
Dragon Pharma |
| Substance |
Testosterone Undecanoate |
| Packaging |
10 mL Multidose Glass Vial |
| Lab Test Result |
Third-party verified (See Lab Test Tab for updates) |
| Half-Life |
Approximately 16.5 days (Ultra-long acting) |
| Recommended Cycle |
14-20 weeks (Due to long ester build-up and clearance) |
| Form |
Oily Injectable Solution (MCT Oil) |
| Aromatization |
Yes, identical to all testosterones. Have an Aromatase Inhibitor like Aromasin available, especially as levels accumulate. |
| Dosage (Men) |
250-1000 mg every 10-14 days OR 250-500 mg per week (see Usage Guidelines) |
Usage Guidelines
Important: Testosterone Undecanoate's long half-life requires different planning. It takes 8-10 weeks to reach true "steady-state" blood levels. Injections can be administered once every 7-14 days for stability. For bodybuilding doses, splitting the dose into weekly injections is common to manage estrogen better. Always consult a healthcare professional.
- Beginner Cycle / TRT (Therapeutic): 250-500 mg injected every 14 days, OR 125-250 mg injected weekly. This range mimics clinical TRT protocols and is a gentle introduction. Start low to assess estrogen response. Have an AI like Arimidex on hand.
- Intermediate Cycle (Lean Mass/Recomp): 500-750 mg per week (injected as one dose every 7 days or split into two) for 14-16 weeks. Stack with other long esters like EQ 300 for enhanced vascularity and appetite, or with Masteron 200 for a harder look with less bloat.
- Advanced Cycle (Mass Building): 750-1000 mg per week for 16-20 weeks. Due to the long ester, front-loading (double the first 1-2 doses) is common to reach stable levels faster. Can be stacked with powerful mass agents like Trenbolone 200 (Enanthate) or Deca 500 for extreme gains. Prolactin management with Caber may be needed in such stacks.
Post Cycle Therapy (PCT):
PCT timing is CRITICAL with Undecanoate. Due to the 16.5-day half-life, you must wait 5-6 weeks after your last injection before starting PCT. Starting too early will result in exogenous testosterone still being active, making PCT ineffective. A strong PCT using Clomid and Nolvadex for 6-8 weeks is necessary. Using HCG 5000 IU during the final 4-5 weeks of the cycle (before the long wait) is highly recommended to prevent testicular atrophy.
Support & Ancillaries:
Estrogen management remains important. Due to stable levels, AI dosing can be more consistent. Monitor for high estrogen signs as levels accumulate over weeks. For those prone to hair loss, Finasteride can be used (as Test Undecanoate converts to DHT). Support cardiovascular health with a clean diet and cardio, as long-term high-dose use can impact lipids. Consider liver support if stacking with oral steroids.
Storage Instructions
Store in a cool, dry place away from direct sunlight. Ideal storage temperature is between 15°C and 25°C (59°F - 77°F). Do not freeze. Keep the vial upright. The MCT oil solution is typically smooth, but the high concentration of the long ester may make it slightly more viscous than shorter ester testosterones. Warming the vial gently in your hands or under warm water for a minute before drawing can make administration easier. Always use aseptic technique with sterile, single-use needles. Keep out of reach of children and pets.
What is the difference between Testosterone Undecanoate and Testosterone Enanthate/Cypionate?
The primary difference is the ester length and half-life. Testosterone Undecanoate has an ultra-long half-life of ~16.5 days, while Enanthate is ~7 days and Cypionate is ~8 days. This means Undecanoate requires far fewer injections (once every 7-14 days vs. twice weekly for Enanthate/Cypionate) to maintain stable levels. It takes much longer to build up to steady-state (8-10 weeks vs. 4-5 weeks) and much longer to clear your system (5-6 weeks vs. 2-3 weeks), which drastically affects PCT timing. Undecanoate offers superior stability and convenience but less flexibility.
Can I use Testosterone Undecanoate for a first steroid cycle?
It can be used, but it's not the most common choice for a first cycle. The long half-life means it takes a long time to reach peak levels, so you won't "feel" the full effects for nearly two months. If side effects occur, they take much longer to subside after stopping. For a first cycle, Testosterone Enanthate 250 or Cypionate 250 is typically recommended because their shorter ester allows for quicker adjustment and a faster learning curve. However, if minimal injection frequency is a top priority, Undecanoate can work with careful planning.
Why is the PCT wait time so long (5-6 weeks) for Undecanoate?
The PCT wait time is directly tied to the ester's half-life. With a ~16.5-day half-life, it takes approximately 5-6 half-lives for the exogenous testosterone to clear your system to a level where your body's own HPTA (Hypothalamic-Pituitary-Testicular Axis) can attempt to restart. Starting PCT with SERMs like Clomid or Nolvadex while significant exogenous testosterone is still present is pointless, as the negative feedback will continue to suppress your natural production. You must be patient and wait the full 5-6 weeks post-injection for PCT to be effective.
Is front-loading necessary with Testosterone Undecanoate?
Front-loading—taking a larger initial dose—is highly recommended with Undecanoate if you want to reach stable, peak blood levels faster. Due to the long ester, it can take 8-10 weeks to reach steady-state naturally. A common front-load protocol is to inject double your planned weekly dose for the first two weeks. For example, if your cycle dose is 500 mg/week, you would inject 1000 mg in week 1 and week 2, then drop to 500 mg/week from week 3 onward. This accelerates the saturation process, allowing you to feel the full effects within 3-4 weeks instead of 8-10.
Can I mix Testosterone Undecanoate with other oils in the same syringe?
Yes, you can safely mix Testosterone Undecanoate with other oil-based compounds in the same syringe, provided they are both sterile and in oil-based carriers (like MCT, sesame, or cottonseed oil). This is common practice to reduce the number of injections. It pairs perfectly in the same syringe with other long-ester compounds like Deca 300 (Nandrolone Decanoate) or EQ 500 (Boldenone Undecanoate). Always draw the compounds separately into the syringe using clean techniques to avoid cross-contamination.
