Testosterone Replacement Therapy
What Is Testosterone Replacement Therapy (TRT)?
TRT is a medical treatment designed to restore normal testosterone levels in men with clinically low testosterone (hypogonadism).
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Normal male testosterone levels: 300–1,000 ng/dL
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TRT is considered if levels are consistently below ~300 ng/dL, and the patient has symptoms
🔍 Who Needs TRT?
Indicated for men with:
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Clinically diagnosed hypogonadism
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Documented low testosterone on two separate morning blood tests
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Symptoms such as:
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Fatigue
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Low libido or erectile dysfunction
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Muscle loss, weight gain
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Depression, irritability
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Brain fog, memory issues
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✅ Common Causes of Low T:
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Aging (andropause)
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Obesity or metabolic syndrome
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Testicular injury or removal
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Pituitary disorders
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Opioid or steroid use
💉 TRT Delivery Methods
Route | Examples | Frequency | Notes |
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Injections | Testosterone cypionate/enanthate | Weekly or bi-weekly | Most cost-effective; large swings possible |
Topical Gel | AndroGel, Testim, Fortesta | Daily | Easy to apply; potential for skin transfer |
Transdermal Patch | Androderm | Daily | Stable dosing; possible skin irritation |
Pellets | Testopel | Every 3–6 months | Implanted under skin; no daily dosing |
Oral | Jatenzo, Tlando (testosterone undecanoate) | Twice daily | Newer; may raise liver enzymes |
Nasal | Natesto | 2–3x daily | Fast, less systemic absorption |
🧪 Monitoring & Lab Testing
Baseline and ongoing labs typically include:
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Total testosterone (morning, fasting)
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Free testosterone
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LH/FSH (to check pituitary function)
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Estradiol (E2)
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Hematocrit & hemoglobin (watch for polycythemia)
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PSA (for prostate screening)
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Lipids & liver enzymes
⚖️ Benefits of TRT
Area | Effect |
---|---|
🧠 Mental | Better mood, confidence, focus |
💪 Physical | Increased lean mass, reduced fat |
🍆 Sexual | Improved libido and erectile function |
🛏️ Energy | Reduced fatigue, better sleep |
🦴 Bone Health | Increased bone mineral density |
⚠️ Risks and Side Effects
Potential Risk | Description |
---|---|
Polycythemia | Elevated red blood cells — may need phlebotomy |
Acne/oily skin | Especially with injections |
Hair loss | If genetically prone to male pattern baldness |
Fertility issues | TRT suppresses sperm production (see below) |
Gynecomastia | Estrogen conversion may cause breast tissue |
Sleep apnea | May worsen in some individuals |
Prostate issues | Can increase PSA; long-term cancer risk is debated |
🧑⚕️ TRT & Fertility
TRT suppresses the body’s natural testosterone production, which can lower or eliminate sperm production.
Alternatives if preserving fertility:
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Clomiphene citrate (Clomid) – stimulates natural testosterone
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hCG (human chorionic gonadotropin) – mimics LH, preserves fertility
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Enclomiphene – newer, purified version of clomid
🧾 Summary Table
Feature | TRT Overview |
---|---|
Indications | Low T symptoms + low blood T |
Methods | Injection, gel, patch, pellet, oral, nasal |
Duration | Long-term, often lifelong |
Key Benefits | Energy, libido, muscle, mood |
Major Risks | Fertility loss, erythrocytosis, gynecomastia |
Monitoring | Labs every 3–6 months |
🧠 Final Thoughts
TRT can significantly improve quality of life in men with clinically low testosterone, but it’s not a cure-all and must be approached carefully. Always:
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Work with an experienced hormone therapy provider
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Monitor labs routinely
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Be honest about fertility goals
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