What Is Jatenzo? Uses, Dosage, and What You Need to Know in 2026

Jatenzo (testosterone undecanoate) is an FDA-approved oral testosterone capsule used to treat low testosterone in adult males with certain medical conditions. It was approved in March 2019 — the first new oral testosterone product in the United States in more than 60 years — and represents a significant advance in how testosterone replacement therapy (TRT) can be delivered.

Here's everything you need to know about Jatenzo in 2026: what it's for, how it works, how you take it, and what to expect.

What Is Jatenzo Used For?

Jatenzo is FDA-approved for testosterone replacement therapy in adult males who have testosterone deficiency (hypogonadism) caused by specific medical conditions. These include:

Primary hypogonadism — caused by testicular failure due to Klinefelter syndrome, chemotherapy, radiation, trauma, or other testicular damage

Hypogonadotropic hypogonadism — caused by pituitary or hypothalamic disorders, such as pituitary tumors, radiation damage, or gonadotropin-releasing hormone deficiency

Jatenzo is

not approved for "age-related hypogonadism" — the natural, gradual decline in testosterone that occurs with normal aging, even if it causes symptoms. It is also not approved for use in women, children, or adolescents under 18.

How Is Jatenzo Different from Other Testosterone Products?

Jatenzo is one of only three oral testosterone products approved in the U.S. (the others are Tlando and Kyzatrex). What makes it different from older oral testosterone products is its delivery mechanism: Jatenzo uses a self-emulsifying drug delivery system (SEDDS) that allows testosterone undecanoate to be absorbed through the intestinal lymphatic system. This bypasses the liver, avoiding the liver toxicity that made older oral testosterone products unsafe.

Compared to other TRT options:

vs. Injections: No needles; no injection site reactions; twice-daily oral dosing vs. weekly or biweekly injections

vs. Gels: No skin-to-skin transfer risk to partners or children; no daily skin application

vs. Patches: No skin irritation from adhesive; no daily patch changes (Androderm, the only testosterone patch, has been discontinued)

vs. Implants: No in-office procedure required; dose can be adjusted at home based on lab results

Jatenzo Dosage and How to Take It

Jatenzo comes in three capsule strengths: 158 mg (red), 198 mg (white), and 237 mg (orange). Each bottle contains 120 capsules.

Starting dose: 237 mg orally twice daily — once in the morning with breakfast and once in the evening with dinner

Dose range: 158 mg to 396 mg (two 198 mg capsules) twice daily, based on testosterone blood levels

Must be taken with food — The fat in food helps Jatenzo absorb properly through the lymphatic system. Never take it on an empty stomach.

Monitoring: After starting Jatenzo, your doctor will measure your testosterone level 6 hours after your morning dose, at least 7 days after starting. Your dose will be adjusted up or down based on this result.

What to Expect When You Start Jatenzo

Most patients reach stable testosterone levels within 7–14 days of starting Jatenzo. Symptom improvements — more energy, better mood, increased libido — typically become noticeable within 3–6 weeks. Full effects on muscle mass and bone density may take 6–12 months.

In the pivotal inTUne clinical trial with 166 hypogonadal men, 87% achieved normal testosterone levels at 4 months of treatment.

Is Jatenzo a Controlled Substance?

Yes. Jatenzo is a Schedule III controlled substance (CIII) under the DEA, because it contains testosterone, which is subject to misuse and abuse. This means:

It requires a valid prescription from a licensed prescriber with DEA authority

Refills require a new prescription in most states (varies by state law)

Keep Jatenzo secure at home — do not share with others; selling or giving it away is illegal

How Much Does Jatenzo Cost?

Without savings assistance, Jatenzo costs $1,300–$1,700+ per month at retail. However, several programs can dramatically reduce this cost:

Commercially insured: Jatenzo Copay Card — as little as $0/month

Cash patients: Tolmar cash program — $185/month through contracted pharmacies

GoodRx: Discount coupon — price as low as ~$1,101 for 60 caps (237 mg)

For a full breakdown of every savings option, see our guide on how to save money on Jatenzo.

The Bottom Line

Jatenzo is a well-established, FDA-approved testosterone replacement therapy for men with clinically confirmed hypogonadism. Its oral route offers genuine convenience advantages over injections and gels. If you've been prescribed Jatenzo and need help finding it at a pharmacy, see our guide on how to find Jatenzo in stock near you.