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At a glance

Muscle growth

Strength

Recovery acceleration

Libido & well-being

Cardiovascular / lipid risk

Aromatization / estrogen effects

Androgenic effects (acne / hair)

Endogenous testosterone suppression

Polycythaemia / raised haematocrit· class-derived

Mood / neuropsychiatric· class-derived

Water / fluid retention· class-derived

BenefitSide effectHealth risk· more & brighter bars = stronger

Effects

Muscle growth: Androgen receptor activation drives skeletal muscle protein synthesis and nitrogen retention, supporting lean mass gains ^[1].
Strength: Elevated testosterone increases neuromuscular efficiency and contractile protein production, improving strength output ^[5].
Recovery: Supraphysiological testosterone accelerates recovery from training by reducing muscle breakdown (catabolism) ^[2].
Libido & well-being: Restoring or elevating testosterone levels is linked to improved sexual drive, mood, and energy in hypogonadal and eugonadal men ^[8].
Gynecomastia / water retention: Aromatisation to estradiol raises estrogen levels; excess estrogen drives breast-tissue growth and fluid retention ^[6].
Androgenic effects: DHT conversion causes acne, oily skin, and accelerated scalp hair loss in genetically predisposed users ^[7].
Endogenous suppression: Exogenous testosterone suppresses the HPG axis, reducing LH and FSH; testicular atrophy and reduced sperm production can follow ^[9].

Classification

Anabolic-androgenic steroid (AAS)

Active half-life

~2 days (elimination t½); mean residence ~4 days [4]

Route

Intramuscular injection (oil solution) [1]

Injection frequency

Every 2–3 days required [1]

Detection time

~2–3 weeks (anti-doping screens; short-ester advantage) [4]

Risks & side effects

Most important: Supraphysiological testosterone use negatively shifts the lipid profile — lowering HDL and raising LDL — and may increase the risk of major adverse cardiovascular events (MACE) including heart attack and stroke ^[6]^[10]. This cardiovascular risk is the single most clinically significant concern with long-term or high-dose use.

Common

Pain, redness and swelling at the injection site ^[7]
Acne and oily skin due to DHT conversion ^[5]^[7]
Increased body and facial hair growth ^[5]
Water retention and bloating from elevated estrogen ^[6]
Gynecomastia (breast tissue enlargement in males) ^[6]
Increased sweating, headache, dizziness ^[8]
Suppression of natural testosterone production ^[9]

Serious

Adverse lipid changes: reduced HDL, elevated LDL — elevating cardiovascular disease risk ^[6]^[10]
Polycythemia (raised red blood cell count), increasing blood-clot and stroke risk ^[11]
Venous thromboembolism ^[11]
Worsening of benign prostatic hyperplasia (BPH); potential growth of sub-clinical prostate cancer ^[11]
Suppression of spermatogenesis and fertility impairment ^[9]^[11]
Testicular atrophy with prolonged use ^[9]
Virilization in women (deepened voice, clitoral enlargement, menstrual disruption) — many effects irreversible ^[7]
Edema in patients with pre-existing cardiac, hepatic, or renal disease ^[10]

Rare

Peliosis hepatis and benign or malignant liver tumours with very high-dose or prolonged use ^[3]
Obstructive sleep apnea — induction or worsening ^[11]
Hypercalcaemia (especially in patients with bone metastases) ^[11]
Severe allergic / anaphylactic reaction ^[8]

Safety & harm reduction

Who must not use it

Known or suspected prostate or breast carcinoma in males ^[3]
Hypersensitivity to testosterone or formulation excipients ^[3]
Pregnant or potentially pregnant women (teratogenic — causes fetal virilization) ^[3]
Severe cardiac, hepatic, or renal disease (exacerbates oedema and complications) ^[3]
Women with hormone-sensitive conditions without specialist supervision ^[7]

Monitoring

Serum total and free testosterone, estradiol — baseline and on-cycle ^[8]
Full lipid panel (HDL, LDL, triglycerides) — cardiovascular risk ^[6]
Complete blood count (CBC) / haematocrit — screen for polycythemia ^[11]
PSA and digital rectal exam — prostate surveillance ^[11]
Liver function tests with high-dose or prolonged use ^[3]
Blood pressure monitoring ^[6]
LH, FSH, and sperm count if fertility is a concern ^[9]

Interactions

Anticoagulants (e.g., warfarin): testosterone potentiates anticoagulant effect — increased bleeding risk; INR monitoring required ^[12]
CYP3A4 inducers (rifampin, phenytoin): accelerate testosterone metabolism, may reduce efficacy ^[12]
CYP3A4 inhibitors (ketoconazole, erythromycin): slow metabolism, raising plasma testosterone and side-effect risk ^[12]
Insulin / oral antidiabetics: androgens may alter glucose metabolism — dose adjustment may be needed ^[11]
Corticosteroids: additive oedema risk ^[11]

Protocols

Aromatase inhibitor (AI, e.g., anastrozole) on hand — use only if estrogenic symptoms appear; do not use prophylactically ^[13]
Post-cycle therapy (PCT) with a SERM (e.g., Nolvadex/tamoxifen or Clomid) after cycle to stimulate HPG axis recovery and restore endogenous testosterone ^[9]^[13]
For Test-P, PCT can begin earlier (within ~3–5 days of last injection) due to short ester clearance ^[9]
Rotate injection sites to reduce localised pain and abscess risk ^[7]
Sterile technique (single-use needles, alcohol wipes) mandatory to prevent infection ^[7]

Dosage context

Medical TRT doses are commonly reported at 25–50 mg every 2–3 days ^[1]^[2] and are not a prescription. Off-label performance use at supraphysiological levels is reported in community sources at higher amounts, though no safe supraphysiological dose exists and sources vary considerably. Short-ester propionate cycles are reported at 8–10 weeks in community guides ^[13], shorter than long-ester equivalents. All dosing must be guided by a qualified healthcare professional.

Sources

This information is provided for educational and harm-reduction purposes only. It is not medical advice. These substances can carry serious health risks; effects and safe use vary by individual. Consult a qualified healthcare professional before use. Legal status varies by country — it is your responsibility to know your local law. We do not encourage misuse.

Other options for Testosterone Propionate· 11 offers

Same compound from different labs/brands and pack sizes. Tap a row to switch brand — the price and buy button update instantly.

This compound comes in different forms (e.g. injectable vs oral vs topical). Cost per mg is only comparable within the same form.

Brand	Form	Strength	Pack	Price	Per mg
DriadaSelected	vial	100 mg/ml	10 ml	36,90 €	★€0.037/mg
Generic	topical-lotion	100 mg/ml	10 ml	38,90 €	€0.039/mg
Generic	vial	150 mg/ml	10 vial	48,90 €	—
Generic	vial	100 mg/ml	10 ml	48,90 €	€0.049/mg
Generic	ampoule	100 mg/ml	10 ampoule	53,90 €	—
Generic	vial	100 mg/ml	10 ml	54,90 €	€0.055/mg
Generic	vial	100 mg/ml	10 ml	64,90 €	€0.065/mg
Generic	vial	100 mg/ml	10 ml	68,90 €	€0.069/mg
Hemi Pharma	vial	100 mg/ml	10 ml	89,90 €	€0.090/mg
Generic	vial	100 mg/ml	10 ml	94,90 €	€0.095/mg
Generic	vial	100 mg/ml	100 ml	600,00 €	€0.060/mg

At a glance

Effects

Product specifics

What it is

How it works