Testosterone Pellet Dosage Guide (2026)
Testosterone pellets (brand name Testopel) are a long-acting, physician-implanted form of testosterone replacement therapy. This page explains the official FDA dosing range, how doctors titrate the dose, typical redosing intervals, and includes a simple mg-to-pellet reference converter — for education only.
What Are Testosterone Pellets?
Testosterone pellets are small, cylindrical implants — each containing 75 mg of crystalline testosterone — that a physician inserts just under the skin (usually in the hip or buttock area) through a small incision under local anesthesia. Once implanted, the pellets slowly dissolve and release testosterone into the bloodstream over several months, which is why this method is described as "long-acting" compared to daily gels, weekly injections, or patches.
Pellets are used to treat confirmed hypogonadism (clinically low testosterone) in men, and are classified by the FDA as a Schedule III controlled substance, meaning they carry recognized potential for abuse and are subject to prescribing restrictions.
- Each pellet contains 75 mg of testosterone
- Pellets measure about 3.2 mm wide and 9 mm long
- Implanted by a clinician in a brief in-office procedure — never self-administered
- Labeled dosing range: 150–450 mg (2–6 pellets) per implantation
- Typically re-dosed every 3–4 months, with a labeled range of up to 6 months
- Requires confirmed low testosterone on two separate morning lab draws before starting
Official FDA Dosing Range
Per the FDA-approved prescribing information for Testopel, the labeled dosage guideline for replacement therapy in androgen-deficient males is:
| Pellets Implanted | Total Dose | Typical Interval |
|---|---|---|
| 2 pellets | 150 mg | Every 3–6 months |
| 3 pellets | 225 mg | Every 3–6 months |
| 4 pellets | 300 mg | Every 3–6 months |
| 5 pellets | 375 mg | Every 3–6 months |
| 6 pellets | 450 mg | Every 3–6 months |
Note that this is a range table, not a lookup chart tied to weight, age, or any other single input. The label explicitly states that dosage is adjusted according to the patient's response and the appearance of adverse reactions — meaning your physician selects a starting point in this range and adjusts it over time using follow-up labs and symptom review.
How Doctors Titrate the Dose
The FDA label describes a specific traditional method some physicians use to estimate a starting pellet dose, based on a patient's prior requirement for injectable testosterone (not on body weight):
Implant two 75 mg pellets for every 25 mg of testosterone propionate required weekly by injection.
Example A: Patient needs 75 mg/week by injection → 450 mg (6 pellets)
Example B: Patient needs 50 mg/week by injection → 300 mg (4 pellets)
Example C: Patient needs 25 mg/week by injection → 150 mg (2 pellets)
This method only applies to patients already established on injectable testosterone who are switching to pellets. For patients starting therapy fresh, physicians typically begin near the middle of the labeled range (commonly 3–4 pellets, 225–300 mg) and adjust at the next follow-up visit based on serum testosterone levels and symptoms.
Redosing Interval & Absorption
Testosterone pellets do not release their hormone content evenly over time. According to the FDA label, absorption follows roughly this pattern:
- Month 1: approximately one-third of the implanted dose is absorbed
- Month 2: approximately one-fourth of the implanted dose is absorbed
- Month 3: approximately one-sixth of the implanted dose is absorbed
This declining absorption curve is why effects "taper off" gradually rather than stopping abruptly, and why most patients return for reimplantation every 3 to 4 months — with the label allowing flexibility up to 6 months depending on how long symptom relief lasts for that individual.
Factors That Influence Dosing
- Baseline and follow-up serum testosterone levels — the primary factor guiding both starting dose and adjustments.
- Prior testosterone therapy history — patients switching from injections have a documented weekly requirement that informs the starting pellet count.
- Symptom response — energy, libido, mood, and other hypogonadism symptoms are tracked at follow-up visits.
- Side effects — including elevated hematocrit (red blood cell concentration), acne, mood changes, or fluid retention, which may prompt a lower dose.
- Age and clinical context — dosing in delayed puberty, for example, generally starts at the lower end of the range for a limited duration.
- Body size — some clinics reference body weight as a rough secondary guide, but this is not part of the FDA-labeled method and varies by provider.
Required Monitoring
Before starting testosterone pellet therapy, the diagnosis of hypogonadism must be confirmed with serum testosterone measured in the morning on at least two separate days, with both results below the normal range. After starting therapy, physicians typically monitor:
- Serum testosterone levels at follow-up visits
- Hematocrit / red blood cell count (risk of polycythemia)
- Blood pressure (testosterone therapy can increase cardiovascular risk over time)
- Prostate-specific antigen (PSA) and prostate exam, particularly in older men
- Lipid profile and liver function, periodically
Risks of Incorrect Dosing
Testosterone therapy carries FDA-labeled warnings including increased risk of venous thromboembolism (blood clots), major adverse cardiovascular events, worsening of untreated prostate conditions, and polycythemia (excess red blood cells) — risks that rise with excessive or poorly monitored dosing. Because pellets cannot be "adjusted down" once implanted the way an oral dose or injection can, physicians are especially cautious about starting at an appropriately conservative dose and monitoring closely — which is why there is no shortcut formula that replaces individualized medical judgment here.
Glossary
- Hypogonadism
- A clinical condition in which the body produces insufficient testosterone, confirmed through repeated morning blood tests below the normal reference range.
- Testosterone Pellet (Testopel)
- A 75 mg cylindrical implant of crystalline testosterone, inserted subcutaneously to provide long-acting hormone replacement.
- Titration
- The process of gradually adjusting a medication dose based on measured response, side effects, and lab results, rather than using one fixed amount for everyone.
- Schedule III Controlled Substance
- A DEA drug classification for substances with recognized medical use and moderate potential for abuse or dependence, subject to stricter prescribing rules than standard prescription drugs.
- Serum Testosterone
- The concentration of testosterone measured in a blood sample, used both to diagnose low testosterone and to monitor therapy.
- Polycythemia
- An abnormal increase in red blood cell concentration (hematocrit), a known risk of testosterone therapy that is monitored via routine blood tests.
Frequently Asked Questions
Q: What is the standard dosage for testosterone pellets?
A: The FDA-labeled range is 150 mg to 450 mg (2 to 6 pellets), implanted subcutaneously every 3 to 6 months. The exact dose is individualized by your physician — there is no single fixed dose for everyone.
Q: How do doctors decide how many testosterone pellets to implant?
A: The traditional labeled method implants two 75 mg pellets for every 25 mg of testosterone propionate a patient previously required weekly by injection, then adjusts based on lab results and symptom response.
Q: Is testosterone pellet dosing based on body weight?
A: No official FDA formula uses body weight. Some clinics use it as an informal secondary reference, but the labeled method is based on prior injectable requirement and ongoing lab monitoring.
Q: How often are testosterone pellets re-implanted?
A: Typically every 3 to 4 months, with the label allowing up to 6 months depending on individual absorption and symptom recurrence.
Q: What size is one testosterone pellet?
A: Each pellet contains 75 mg of testosterone and measures about 3.2 mm in diameter and 9 mm in length, implanted by a clinician — never self-administered.
Q: Can I calculate my own testosterone pellet dose?
A: No. This is a controlled substance requiring diagnosis, lab confirmation, and physician judgment — there is no safe self-calculated dose. Always consult a licensed physician.
Sources
- TESTOPEL® (testosterone pellets) full prescribing information, Endo USA, Inc. — via DailyMed, U.S. National Library of Medicine
- TESTOPEL® official dosing guidelines page, Endo/Keenova Therapeutics
- Testopel prescribing information / package insert summary — Drugs.com
This page is provided for general educational purposes only and does not constitute medical advice, diagnosis, or treatment. Testosterone pellet therapy is a prescription-only, physician-administered treatment for a diagnosed medical condition. Always consult a licensed healthcare provider before starting, changing, or stopping any hormone therapy.