BHRC BLOG
Testosterone Cypionate Dosage Guide: TRT Doses, Units & Lab Targets
Medically reviewed by the BHRC Clinical Team · Last reviewed 2026-11-14
Testosterone cypionate is the most widely prescribed injectable for testosterone replacement therapy (TRT) in the United States. Getting the dose right matters more than the brand: too little and symptoms don’t improve, too much and blood count, estrogen and blood pressure climb without any added benefit.
This guide covers the dose ranges used in current practice, how to convert milligrams into milliliters and syringe units, how SubQ and intramuscular injections compare, and the blood work that keeps treatment safe. It reflects the American Urological Association (AUA) and Endocrine Society guidelines and the protocol our providers follow in our men’s hormone program.
Important: Testosterone cypionate is a prescription-only, DEA Schedule III medication. Your dose must be set and adjusted by a licensed provider based on your symptoms and lab results. This guide is educational and is not a substitute for medical advice.
Quick Testosterone Cypionate Dosing Summary
Most men on TRT use 80-160 mg of testosterone cypionate per week, split into one or two injections, with the dose adjusted to keep blood testosterone in the middle of the normal range (about 450-600 ng/dL).
- Typical starting dose: 100 mg per week, either 50 mg twice weekly under the skin (SubQ) or 80-100 mg once weekly into the muscle (IM)
- Usual range: 60-160 mg/week SubQ or 80-200 mg/week IM, adjusted in 10-20 mg steps
- Units on a U-100 syringe: 50 mg = 25 units of a 200 mg/mL vial, or 50 units of a 100 mg/mL vial
- Lab target: Mid-normal total testosterone; recheck 6-12 weeks after starting or changing the dose
- Main safety check: Hematocrit (blood thickness); dose is held if it reaches 54%
- When you’ll notice it: Libido and energy in 3-6 weeks; body composition over 3-6 months
What Is Testosterone Cypionate?
Testosterone cypionate is bioidentical testosterone attached to a cypionate ester and dissolved in cottonseed oil. The ester slows release from the injection site, giving a half-life of about 8 days. Levels peak 2-3 days after an injection and drift down until the next one.
It is FDA-approved for men with hypogonadism (clinically low testosterone). Brand Depo-Testosterone and generics come in 100 mg/mL and 200 mg/mL strengths. At BHRC we prescribe commercial, FDA-approved vials: 100 mg/mL and 200 mg/mL in 10 mL multi-dose vials, and a 200 mg/mL 1 mL single vial for men starting out or traveling.
The FDA label lists 50-400 mg every 2-4 weeks. Modern TRT uses much smaller, more frequent doses, because large doses every 2-4 weeks cause a high peak followed by a crash, which brings back symptoms and raises estrogen and hematocrit.
Who Should Be on Testosterone Cypionate?
Guidelines require both symptoms and lab confirmation before starting testosterone:
- Two early-morning blood tests (7-10 am, on separate days) showing total testosterone below about 300 ng/dL
- Symptoms such as low libido, fewer morning erections, fatigue, low mood, loss of muscle or low bone density
- A baseline workup: free testosterone, SHBG, LH, FSH, estradiol, prolactin when indicated, CBC, PSA, metabolic panel, lipids and A1c
Testosterone is the wrong first choice for men who want children in the next year or two, because it shuts down sperm production. Those men usually do better with enclomiphene or with hCG. Read more about who qualifies for TRT.
Testosterone Cypionate Dosage Chart
These are the starting points and ranges our providers work within. Your actual dose depends on your labs, symptoms, body weight and how you respond.
Starting doses and adjustment
| Route | Typical start | Adjustment step | Usual weekly range |
|---|---|---|---|
| SubQ (under the skin) | 50 mg twice weekly (100 mg/week) | ± 10-20 mg/week | 60-160 mg/week |
| IM (into the muscle) | 80-100 mg once weekly | ± 10-20 mg/week | 80-200 mg/week |
| IM, every 2 weeks (older approach) | 200 mg | Usually moved to weekly | Not preferred: large peaks and troughs |
Ranges reflect AUA 2018 and Endocrine Society 2018 guidance, product labeling and urology practice. Never change your dose without your provider.
How Many Units Is My Dose? (mg to mL to Units)
Most men inject with a U-100 insulin syringe, which is marked in units, while prescriptions are written in milligrams. The math: dose (mg) ÷ vial strength (mg/mL) = mL, and mL × 100 = units. Always check the strength printed on your vial first, because the same dose is twice as many units on a 100 mg/mL vial.
Testosterone cypionate conversion chart
| Dose | 200 mg/mL vial | 100 mg/mL vial |
|---|---|---|
| 40 mg | 0.20 mL = 20 units | 0.40 mL = 40 units |
| 50 mg | 0.25 mL = 25 units | 0.50 mL = 50 units |
| 60 mg | 0.30 mL = 30 units | 0.60 mL = 60 units |
| 70 mg | 0.35 mL = 35 units | 0.70 mL = 70 units |
| 80 mg | 0.40 mL = 40 units | 0.80 mL = 80 units |
| 100 mg | 0.50 mL = 50 units | 1.00 mL = 100 units |
Doses above 100 mg on a 100 mg/mL vial exceed a 1 mL insulin syringe. Use the syringe your clinic provides.
SubQ vs. IM Testosterone Injections
Both routes raise testosterone effectively. The difference is mostly comfort and how steady your levels are.
| Subcutaneous (SubQ) | Intramuscular (IM) | |
|---|---|---|
| Needle | 27-30G, ½ inch, into belly or thigh fat | 23-25G, 1-1.5 inch, into glute, thigh or shoulder muscle |
| Typical schedule | Twice weekly | Once weekly |
| Level swings | Smaller peaks and troughs | Larger peak 2-3 days after injection |
| Hematocrit and estrogen | Tend to rise less | Tend to rise more with large doses |
| Label status | Off-label for cypionate (common practice) | FDA-labeled route |
Splitting the weekly dose into two smaller SubQ injections narrows the peak-to-trough swing. Studies comparing the routes have found SubQ dosing reaches normal levels with lower estradiol and hematocrit. That is why most of our patients use twice-weekly SubQ injections.
How Often Should You Inject?
With an 8-day half-life, the more often you inject, the steadier your levels. Practical guidance:
- Twice weekly (for example Monday and Thursday) is the most common schedule and suits most men.
- Once weekly IM works well if levels and symptoms stay steady through day 7.
- Every other day or daily micro-dosing is occasionally used for men with high hematocrit or estrogen-related symptoms, at the same total weekly dose.
- Every 2 weeks is outdated for most men. Symptoms often return in the second week.
Lab Targets and Monitoring Schedule
The goal is a mid-normal testosterone level, not the highest number possible. The AUA suggests aiming for 450-600 ng/dL, and the Endocrine Society adjusts the dose if a mid-interval level is below 350 or above 600 ng/dL. Going higher raises side effects without clear extra benefit.
When we check your blood work
| When | What we check | What triggers a change |
|---|---|---|
| Before starting | Two AM total T, free T, SHBG, LH, FSH, estradiol, prolactin*, CBC, PSA (age 40+), CMP, lipids, A1c, blood pressure | Hematocrit above 50%, PSA above 4 (above 3 if high-risk), or high prolactin are worked up first |
| 6-12 weeks | Total T, hematocrit, blood pressure, symptoms (estradiol if breast symptoms) | T below 350 or above 600 ng/dL → adjust dose; hematocrit 54% or higher → hold |
| 3-6 months | PSA, hematocrit, total T after any dose change | PSA rising more than 1.4 ng/mL in a year → urology referral |
| Every 6-12 months | Total T, hematocrit, blood pressure, symptoms | No benefit after 3-6 months at a good level → stop |
*Prolactin when LH is low or normal, or total T is below 150 ng/dL. Draw labs at the same point in your injection cycle each time.
Side Effects and Safety
- High hematocrit (thick blood): the most common reason to adjust the dose. Testosterone stimulates red blood cell production. At 54% we pause treatment, look for causes like sleep apnea or smoking, and restart at a lower or more frequent dose.
- Fertility: testosterone shuts down your own production and usually lowers sperm count, often to zero within months. Recovery after stopping can take 6-24 months and isn’t guaranteed. If you might want children, ask about adding hCG or switching to enclomiphene.
- Estrogen-related symptoms: breast tenderness or swelling. The first fix is a smaller, more frequent dose. An aromatase inhibitor such as anastrozole is used only if symptoms persist, because lowering estradiol too far hurts bone, libido and cholesterol.
- Blood pressure: in 2025 the FDA required all testosterone products to warn about blood pressure increases. We check it at every visit.
- Heart safety: the 2023 TRAVERSE trial (5,246 men aged 45-80 with or at high risk of heart disease) found testosterone did not increase heart attacks or strokes compared with placebo (7.0% vs 7.3%), but there were slightly more pulmonary emboli, atrial fibrillation and acute kidney injury.
- Prostate: we monitor PSA. A fast rise, a new nodule or worsening urinary symptoms leads to a urology referral.
- Other: acne, oily skin, fluid retention, worsening sleep apnea and injection-site soreness.
Seek emergency care for chest pain, sudden shortness of breath, one-sided leg swelling, or coughing and throat tightness within minutes of an injection.
How We Prescribe Testosterone Cypionate at BHRC
Our men’s hormone program is built around safe, steady levels rather than high doses:
- Consult and two morning lab draws to confirm low testosterone and rule out causes we should treat first, such as sleep apnea, high prolactin or medication effects.
- A fertility conversation before anything is prescribed. If children are in your plans, we start with fertility-sparing options or add hCG.
- First injection in clinic. A nurse teaches you to draw up and inject your dose, confirms your vial strength, and gives you a units chart and sharps container.
- Labs at 6-12 weeks, then every 6-12 months once you’re stable, always at the same point in your injection cycle.
- Easy refills. Existing patients can request medication and lab orders online through our refill request form.
Testosterone therapy is available at our West Hollywood, West Los Angeles, Westlake Village, Valencia, Summerlin / Las Vegas, Paradise Valley / Scottsdale clinics.
Testosterone Cypionate Dosage FAQs
What is a normal TRT dose of testosterone cypionate?
Most men do well on 80-160 mg per week. A common start is 100 mg per week, given as 50 mg twice weekly under the skin or once weekly into the muscle. The dose is then adjusted in 10-20 mg steps based on blood work at 6-12 weeks.
How many units is 100 mg of testosterone cypionate?
On a 200 mg/mL vial, 100 mg is 0.5 mL, or 50 units on a U-100 insulin syringe. On a 100 mg/mL vial, 100 mg is 1 mL, or 100 units. Always check the strength on your vial.
Is 200 mg of testosterone cypionate a week too much?
For most men on TRT, yes. 200 mg per week usually pushes levels above the normal range, which raises hematocrit, estrogen and blood pressure without clear extra benefit. A few men need doses near the top of the range, but only when blood work supports it.
Is it better to inject testosterone once or twice a week?
Twice a week gives steadier levels and usually lower estradiol and hematocrit than one larger weekly injection. Once weekly can work well if you feel steady all week and your labs are in range.
Can testosterone cypionate be injected subcutaneously?
Yes. The label lists intramuscular use, but subcutaneous injection into belly or thigh fat with a small insulin needle is widely used and well studied. It’s less painful and gives smoother levels.
When should I get my testosterone level checked?
6-12 weeks after starting or changing your dose, then every 6-12 months. Draw at the same point in your cycle each time, usually just before an injection or midway between injections, so results can be compared.
How long does testosterone cypionate take to work?
Libido and energy usually improve within 3-6 weeks, mood within 3-6 weeks, and changes in muscle and body fat over 3-6 months. Bone density improves over 1-2 years.
Will testosterone cypionate make me infertile?
It usually lowers sperm production while you’re on it, often to zero. Recovery after stopping can take months to years. If you may want children, tell your provider before starting. hCG or enclomiphene can help protect fertility.
References
- Mulhall JP et al. Evaluation and Management of Testosterone Deficiency: AUA Guideline, 2018. American Urological Association
- Bhasin S et al. Testosterone Therapy in Men With Hypogonadism: An Endocrine Society Clinical Practice Guideline, 2018. Endocrine Society
- Lincoff AM et al. Cardiovascular Safety of Testosterone-Replacement Therapy (TRAVERSE). N Engl J Med, 2023. NEJM
- FDA issues class-wide labeling changes for testosterone products, 2025. U.S. Food and Drug Administration
- Depo-Testosterone (testosterone cypionate injection) prescribing information. DailyMed
- Subcutaneous vs. intramuscular testosterone injections: published comparisons. PubMed
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