Testosterone Cypionate
tes-TOS-ter-one sin-pee-on-ate
Category
Compound type
Phase / Status
Approved testosterone medication where indicated. Widely used in clinical practice; standard monitoring is recommended.
Standard Dose
Once or twice weekly
Half-life
Plasma elimination
Route(s)
Intramuscular
Research Stage
Regulatory approval granted; post-market monitoring ongoing.
Overview
Testosterone cypionate is used medically to treat testosterone deficiency. Because it is formulated as a long ester, levels tend to change more gradually than with shorter-acting forms. Human outcomes depend on indication and medical monitoring.
Plain-language summary
Testosterone cypionate is used medically to treat testosterone deficiency. Because it is formulated as a long ester, levels tend to change more gradually than with shorter-acting forms. Human outcomes depend on indication and medical monitoring.
Administration Routes
- Intramuscular
Also known as
Mechanisms
Exogenous testosterone ester - binds to androgen receptors, promotes protein synthesis and nitrogen retention. Basically replaces or adds to your natural testosterone to turn on all the masculine, muscle-building pathways.
Detailed mechanism
Exogenous testosterone ester - binds to androgen receptors, promotes protein synthesis and nitrogen retention. Binds to specific hormone receptors to regulate physiological processes including metabolism, tissue repair, and cellular function.
Safety
Side effects
- Testosterone suppression (natural production)
- May convert to estrogen (gynecomastia)
- Hair loss (if prone)
- Acne
- Increased hematocrit
- Prostate enlargement
Reported benefits
- Increases muscle mass
- Improves strength
- Boosts libido
- Improves mood
- Increases bone density
- FDA approved for TRT
Safety profile
Well-characterized safety profile with risks that depend on dose, underlying health, and monitoring. Use only under appropriate medical supervision.
Clinical trials
Completed clinical trials leading to FDA or regulatory approval.
Structure
Verified structure
Testosterone Cypionate
Exact 2D structure can be rendered from a PubChem-backed canonical SMILES string.
- Chemical Formula
- C27H40O3
- Molecular Weight
- 412.63 g/mol
- CAS Number
- 58-20-8
- InChIKey
- HPFVBGJFAYZEBE-ZLQWOROUSA-N
Stack Context
Stacks with
Comparison context
Testosterone cypionate is a commonly prescribed long-acting ester. Compared with some shorter-acting forms, it typically requires less frequent dosing, and compared with very long esters it may clear somewhat faster. Dosing goals differ between medical replacement and non-medical use.
References
- 1View source
Testosterone replacement therapy in men with hypogonadism (NEJM)
2013
- 2View source
Effects of testosterone replacement in hypogonadal men (Journal of Clinical Endocrinology)
2001
This profile summarizes research literature for education only. It is not medical advice, and it does not diagnose, treat, or recommend a dose. Consult a qualified professional before changing a protocol.