Testosterone Replacement Therapy (TRT): What It Is, Cost, and Who Qualifies

Testosterone replacement therapy (TRT) is a prescription treatment that supplies testosterone from outside the body, usually as an injection, a skin gel or pellets placed under the skin, to bring low levels back into the normal range. It’s meant for men who have both symptoms of low testosterone and blood tests that confirm low levels, usually on two separate early-morning draws. TRT also turns down the signals that drive sperm production, so it isn’t a neutral choice if you want children. And because testosterone is a Schedule III controlled substance, starting it takes an in-person evaluation and lab work, not an online questionnaire.

This guide is the plain-English overview of testosterone replacement therapy for men. If you’re in the Houston area and want to know how our clinic approaches it, see our testosterone replacement therapy page and our low testosterone treatment page.

What is TRT and how does it work?

Your body runs testosterone on a feedback loop. The hypothalamus in your brain signals the pituitary gland, which releases two hormones: LH, which tells the testes to make testosterone, and FSH, which works with the high testosterone levels inside the testes to support sperm production.

TRT puts testosterone straight into your bloodstream. Your brain senses there’s enough and turns LH and FSH down. The FDA-approved label for testosterone gel says sperm production “may be suppressed through feedback inhibition of pituitary FSH” (testosterone gel prescribing information). That’s why your own production, testicle size and sperm count usually drop while you’re on TRT.

The goal isn’t a high number. The Endocrine Society guideline advises raising testosterone into the mid-normal range. Pushing it above normal adds risk without clear extra benefit.

Why your testosterone is low matters too. It can start in the testes (primary hypogonadism) or in the brain’s signal to them (secondary hypogonadism), and some cases are functional and reversible. The FDA still keeps a “limitation of use” statement for age-related low testosterone on testosterone product labels (FDA, 2025).

Who qualifies for TRT?

TRT for men makes sense only when two things are true at the same time.

1. You have symptoms. Common ones are a lower sex drive, erection problems, fatigue, muscle loss, more belly fat and low mood. Our guide to low testosterone symptoms walks through all 12.

2. Your labs confirm it. The AUA guideline treats a man as testosterone deficient only when he has both low testosterone and symptoms or signs. The usual cutoff is total testosterone below 300 ng/dL on two separate early-morning tests. The Endocrine Society also asks for consistent symptoms and clearly, consistently low levels.

One afternoon reading isn’t enough, because testosterone peaks in the morning and changes from day to day.

A good evaluation also looks for the cause: LH, FSH, estradiol, prolactin and other markers, plus your sleep, weight and medications. Untreated sleep apnea, extra weight and some medicines all lower testosterone, and fixing them is sometimes enough. Our pages on what causes low testosterone, comprehensive hormone testing and the low testosterone evaluation cover this step. It’s also why we don’t start every man on testosterone injections.

TRT types compared: injections, gels and pellets

Table sources: the Endocrine Society notes that gels raise red blood cell counts less than injections (Bhasin et al., 2018). The gel label carries a boxed warning about children exposed through skin contact (prescribing information). The pellet label lists a 3 to 6 month interval, calls pellets “much less flexible for dosage adjustment” and reports implant-site infection and pellets working their way out (pellet prescribing information).

Other forms exist, including capsules, a nasal gel and patches. The right one depends on your labs, your routine, who you live with and how closely you want to manage the dose. Your provider should explain why one form suits you better than another.

How much does TRT cost?

TRT cost isn’t one number. What you pay for TRT treatment depends on:

• The form. Injections, gels and pellets are priced very differently, and pellets add a procedure fee each time.
• First labs. Two morning testosterone draws plus LH, FSH, estradiol, a blood count and, for many men, PSA.
• Visits. The first in-person evaluation and the follow-ups.
• Ongoing monitoring. Repeat labs at 3 to 6 months, then at least once a year.
• Insurance. Coverage varies by plan. Many plans want documented low labs, and some need prior authorization for certain forms.
• Memberships. Some clinics bundle visits and labs into a monthly fee. See our membership options.

A low advertised price that leaves out labs and follow-up isn’t a bargain. Monitoring is how TRT problems get caught early. Ask any clinic, including ours, for a full breakdown before you start.

Not sure whether your symptoms are low testosterone? Start with an in-person evaluation and morning labs, and a plan built around the cause. See what a low T evaluation involves

What to expect after starting TRT

Results vary, and no one can promise a specific outcome. A review of the clinical studies by Saad and colleagues (2011) described these typical timelines in men with confirmed low testosterone:

• Sex drive: changes after about 3 weeks, leveling off at about 6 weeks
• Quality of life: changes within 3 to 4 weeks, with the full benefit taking longer
• Mood: changes after 3 to 6 weeks, with the most benefit at 18 to 30 weeks
• Erections and ejaculation: can take up to 6 months
• Fat, muscle and strength: changes within 12 to 16 weeks, settling at 6 to 12 months
• Bone: measurable after 6 months and continuing for at least 3 years
• Red blood cells: rising by 3 months and peaking at 9 to 12 months, which is why hematocrit gets checked

If your symptoms haven’t improved once your levels are in range, that’s a reason to look for another cause, not to raise the dose.

Monitoring on TRT

The Endocrine Society recommends a standard monitoring plan:

• A follow-up visit 3 to 12 months after starting, then once a year, to check symptoms and side effects
• Testosterone 3 to 6 months after starting, aiming for the mid-normal range
• Hematocrit before starting, at 3 to 6 months, then once a year
• PSA and a prostate exam before starting and 3 to 12 months after, for men 55 to 69 (or 40 to 69 at higher risk) who choose prostate monitoring, then routine screening

Many clinicians also check estradiol if there are symptoms such as breast tenderness, and blood pressure at each visit, since the FDA now requires blood pressure warnings on all testosterone products. Our page on hormonal imbalance in men explains the estrogen side. For heart safety, our post on TRT and heart health covers the large TRAVERSE trial, and our post on TRT and prostate enlargement covers urinary symptoms.

TRT and fertility

If you want children now or in the next few years, TRT is usually the wrong first step. The Endocrine Society recommends against testosterone therapy in men planning a family soon. A review in Translational Andrology and Urology explains that outside testosterone shuts down testosterone production inside the testes, sometimes enough to leave no sperm in the ejaculate. Most men recover sperm production within a year of stopping, but the authors note that this estimate comes mostly from male contraceptive studies and recovery isn’t guaranteed.

In two randomized trials, testosterone gel lowered sperm concentration while enclomiphene raised testosterone and kept sperm counts normal (Kim et al., 2016). Our posts on fertility after testosterone treatment and low testosterone and fertility go further.

Who shouldn’t use TRT?

The Endocrine Society recommends against testosterone therapy in men who:

• Are planning a family in the near future
• Have breast or prostate cancer
• Have a prostate lump or hardness, or a PSA above 4 ng/mL (above 3 ng/mL if at high risk), without further urology evaluation
• Have a high hematocrit
• Have untreated severe obstructive sleep apnea (see sleep apnea in men)
• Have severe urinary symptoms
• Have uncontrolled heart failure, or a heart attack or stroke in the last 6 months
• Have an inherited tendency to form blood clots

If prostate health is on your mind, read about prostate cancer and testosterone therapy.

Alternatives to TRT

TRT is one treatment path, not the only option for low testosterone.

• Enclomiphene or clomiphene. These raise your own LH and FSH so the testes make more testosterone, which can protect sperm production in men with secondary hypogonadism. Enclomiphene isn’t FDA-approved. See enclomiphene for men and Clomid for men.
• Treating the cause. Weight loss, better sleep, strength training and a medication review can raise testosterone modestly, mostly in men who are overweight or short on sleep. See how to increase testosterone.
• Fertility-preserving care. Our natural testosterone therapy page covers options that support your own production.

Can you stop TRT?

Yes, but plan it with your provider. Because TRT shuts down your own production, levels and symptoms can drop after you stop, and recovery time varies from man to man. Never stop or change your dose on your own.

TRT evaluation in Houston

The Y Factor evaluates and treats low testosterone at two clinics: Memorial on the Katy Freeway and The Woodlands on Medical Plaza Drive. Men come to us from across the area, including Conroe and Katy. Every testosterone replacement therapy decision starts with an in-person visit, morning labs and a look for the underlying cause.

Find out whether TRT, a fertility-preserving option or treating the root cause is right for you. Book a low T evaluation