Oral Testosterone Replacement Therapy In Canada: A Guide

Testosterone replacement therapy (TRT) in Canada can be delivered in several ways, including injections, topical treatments and oral testosterone. Oral TRT offers a prescription option for men with appropriately diagnosed testosterone deficiency who may prefer taking testosterone by mouth rather than using injections or topical products.

However, oral testosterone is not one single type of treatment. Older oral androgen products and newer testosterone undecanoate formulations can differ in how they are absorbed, how often they are taken and how they are monitored.

One of the newest developments is KYZATREX, an oral testosterone undecanoate capsule that launched in Canada in September 2026. It adds another oral option to the Canadian TRT landscape and is currently supplied in Canada in 150 mg and 200 mg capsules.

Oral TRT still requires medical assessment, confirmation of testosterone deficiency and ongoing monitoring. The appropriate formulation depends on factors such as medical history, treatment goals, fertility considerations and practitioner assessment.

Topics covered in this article:

What Is Oral Testosterone Replacement Therapy?

Oral testosterone replacement therapy is a prescription form of TRT in which testosterone is taken by mouth to replace testosterone in men with confirmed deficiency.

Unlike treatments intended to stimulate the body's own testosterone production, oral TRT provides testosterone from an external source. This means it works toward the same general goal as injectable and topical TRT: restoring testosterone to an appropriate range in men who have been properly diagnosed.

Oral testosterone is available in different formulations, and they should not all be assumed to work the same way. Differences in the active formulation, delivery system, absorption, food requirements and dosing schedule can affect how each product is used.

Modern oral testosterone undecanoate formulations are particularly important in this distinction because they may use intestinal lymphatic absorption rather than relying primarily on conventional first-pass liver metabolism.

Oral TRT is also different from over-the-counter products marketed as testosterone boosters. Prescription oral testosterone contains testosterone and requires practitioner assessment, prescribing and ongoing monitoring.

How Does Oral Testosterone Work?

Oral testosterone works by delivering testosterone through the digestive system, but the way it reaches the bloodstream depends on the specific formulation.

Some older oral androgen formulations are absorbed through the gastrointestinal tract and undergo substantial processing through the liver. This contributed to concerns about liver effects with certain older oral products and is one reason oral testosterone formulations should not be discussed as though they are all identical. The existing version of this article currently describes oral testosterone too broadly in this respect.

Testosterone undecanoate is different. Some oral testosterone undecanoate formulations are designed to be absorbed through the intestinal lymphatic system, reducing conventional first-pass liver metabolism before testosterone reaches the bloodstream.

For example, KYZATREX uses a self-emulsifying drug delivery system (SEDDS) designed to support intestinal lymphatic absorption of testosterone undecanoate when taken with food.

Once absorbed, the testosterone acts as externally supplied testosterone rather than causing the body to produce more of its own. As with other forms of TRT, this can suppress natural LH and FSH signalling over time and may affect sperm production and fertility.

Because absorption, dosing and monitoring can vary by formulation, men taking oral testosterone should follow the instructions for their specific prescribed product rather than assuming that all oral testosterone capsules work the same way.

What Types of Oral Testosterone Are Available?

Oral testosterone is available in different formulations, and the way each product is absorbed, dosed and monitored can vary.

Older oral androgen formulations were often limited by factors such as liver metabolism, variable absorption and more frequent dosing. Some of these products are used less often today because newer formulations offer different delivery systems and pharmacokinetic profiles.

Oral testosterone undecanoate is a newer type of oral TRT that can be absorbed through the intestinal lymphatic system rather than relying primarily on conventional first-pass liver metabolism.

Different oral testosterone products may also vary in:

1. Capsule strength
2. Dosing frequency
3. Delivery system
4. Food requirements
5. Absorption characteristics
6. Blood-test timing
7. Dose-adjustment approach

These differences are important because oral testosterone products should not automatically be considered interchangeable. Men should follow the prescribing instructions for the specific formulation they are using.

What Is Different About Modern Oral Testosterone?

Modern oral testosterone formulations use newer delivery systems designed to improve absorption and make treatment easier to monitor and adjust.

One important development is the use of testosterone undecanoate formulations that support absorption through the intestinal lymphatic system. This reduces conventional first-pass exposure through the liver compared with some older oral androgen formulations.

Some newer products also use specialized delivery systems that help improve the consistency of absorption and allow practitioners to adjust dosing based on measured testosterone levels.

However, modern oral testosterone products are not all identical. Their delivery systems, capsule strengths, dosing schedules and food requirements can differ.

Food can still play an important role in absorption. Some formulations need to be taken with food, and meal composition may affect how much testosterone is absorbed. Patients should therefore follow the instructions for their specific prescription rather than assuming that all oral testosterone products can be taken in the same way.

Modern oral TRT may provide a practical alternative for men who prefer to avoid injections or topical treatment, but it still requires confirmed testosterone deficiency, individualized dosing and ongoing medical monitoring.

What Is KYZATREX?

KYZATREX is a newer prescription oral testosterone undecanoate formulation that launched in Canada in September 2026.

It is approved by Health Canada for appropriate use in adult men with testosterone deficiency and provides another oral option alongside injectable and topical forms of testosterone replacement therapy.

KYZATREX uses a self-emulsifying drug delivery system (SEDDS) designed to support intestinal lymphatic absorption of testosterone undecanoate when taken with food.

Health Canada has approved KYZATREX in 100 mg, 150 mg and 200 mg strengths. However, it is currently supplied in Canada as 150 mg and 200 mg capsules.

KYZATREX is a controlled drug and requires a prescription. Treatment should only begin after testosterone deficiency has been appropriately confirmed and a healthcare practitioner has determined that oral TRT is suitable.

KYZATREX should not be assumed to work the same way as older oral testosterone products simply because they may contain the same testosterone ester. Its delivery system, available strengths, dosing schedule and monitoring requirements are specific to the formulation.

For a detailed look at dosing, absorption, food requirements, side effects and monitoring, read KYZATREX in Canada: What to Know About Oral Testosterone.

How Is KYZATREX Different From Older Oral Testosterone?

KYZATREX is a distinct oral testosterone undecanoate formulation with its own delivery system, dosing approach and monitoring requirements.

Older oral testosterone capsules may have different absorption patterns, food requirements and dosing schedules. They should not be assumed to work the same way as KYZATREX simply because they are also taken by mouth.

KYZATREX uses a self-emulsifying drug delivery system (SEDDS) designed to support intestinal lymphatic absorption when taken with food. In Canada, it is currently supplied as 150 mg and 200 mg capsules and is generally taken twice daily, with dosing adjusted according to testosterone levels and treatment response.

Because the formulation has its own prescribing and monitoring requirements, patients should follow the instructions for KYZATREX specifically rather than applying guidance from older oral testosterone products.

For more details on dosing, absorption, food requirements, side effects and monitoring, read KYZATREX in Canada: What to Know About Oral Testosterone.

Is Oral Testosterone Available in Canada?

Yes. Oral testosterone replacement therapy is available in Canada by prescription.

Different oral testosterone formulations may have different availability, dosing schedules and prescribing requirements.

KYZATREX joined the Canadian market in September 2026, adding a newer oral testosterone undecanoate option. It is currently supplied in Canada as 150 mg and 200 mg capsules.

Availability does not mean oral TRT is appropriate for everyone with symptoms of low testosterone. Treatment still requires a healthcare practitioner assessment, confirmation of testosterone deficiency and consideration of medical history, fertility goals and potential treatment risks.

Who May Be Considered for Oral TRT?

Oral TRT may be considered for men with symptoms consistent with testosterone deficiency and repeatedly confirmed low testosterone levels.

Eligibility should be based on more than symptoms alone. A healthcare practitioner may consider:

1. Symptoms consistent with testosterone deficiency
2. Confirmed low testosterone on appropriate blood testing
3. The likely underlying cause of low testosterone
4. Medical history and current health conditions
5. Current medications
6. Fertility goals
7. Contraindications and treatment risks
8. Preference for oral treatment compared with injections or topical options

Oral TRT may be appealing to men who prefer to avoid injections or daily topical application, but route preference is only one part of the decision.

Men who are trying to conceive or want to preserve fertility should discuss this before starting treatment because external testosterone can suppress the hormonal signals involved in sperm production.

The final decision should be individualized and based on diagnosis, medical suitability, treatment goals and ongoing monitoring.

How Is Low Testosterone Confirmed Before Oral TRT?

Low testosterone should be confirmed with symptoms plus consistently low testosterone levels on repeat morning blood tests.

A single low result is usually not enough to establish testosterone deficiency. A healthcare practitioner will consider symptoms together with repeat blood testing and the broader clinical picture before deciding whether testosterone replacement therapy is appropriate.

Depending on the situation, additional hormone or endocrine tests may also be ordered to help identify why testosterone is low. These may include tests related to pituitary or testicular function.

For more detail on how LH and FSH can help identify the cause of low testosterone, read LH and FSH Before TRT: What Low Levels Can Mean.

What Are the Benefits of Oral TRT?

The main benefit of oral TRT is that it provides a needle-free, non-topical way to replace testosterone in men who are appropriate candidates for treatment.

For some men, taking testosterone by mouth may be more convenient than using injections or applying a topical product every day.

Potential practical advantages include:

1. No needles or self-injection
2. No daily skin application
3. No topical transfer concerns
4. A familiar oral dosing routine
5. Ability to monitor testosterone levels and adjust dosing when appropriate
6. The same general treatment goal as other TRT routes: restoring testosterone to an appropriate range in men with confirmed deficiency

Some men with confirmed testosterone deficiency may experience improvements in symptoms after testosterone levels are restored, but response varies. Oral TRT should not be expected to produce the same degree of improvement in energy, sexual function, mood or body composition for every individual.

The most appropriate route depends on medical suitability, treatment response, dosing preference and practitioner guidance.

What Are the Risks and Side Effects of Oral TRT?

Oral TRT can cause side effects associated with testosterone therapy, and the exact risks can vary by formulation and individual health factors.

Potential side effects and safety considerations may include:

1. Increased hematocrit or hemoglobin
2. Increased blood pressure
3. Fluid retention or swelling
4. Changes in lipid levels
5. Acne or oily skin
6. Prostate-related symptoms or monitoring needs
7. Suppression of sperm production and fertility
8. Possible worsening of sleep apnea in susceptible individuals
9. Risk of venous thromboembolism in some patients
10. Other testosterone-related effects

Some risks are shared across testosterone replacement methods, while others may depend on the specific oral formulation being used.

Because external testosterone can suppress LH and FSH signalling, men who are trying to conceive or who want to preserve fertility should discuss this before starting treatment.

Ongoing monitoring may include testosterone levels, hemoglobin and hematocrit, blood pressure, lipids, prostate-related markers when appropriate and other tests based on medical history and the prescribed product.

Does Oral Testosterone Affect the Liver?

It depends on the formulation.

Some older oral androgen formulations, particularly 17-alpha-alkylated androgens, have been associated with liver toxicity because of the way they are processed through the liver.

Oral testosterone undecanoate uses a different absorption pathway. Certain formulations are absorbed through the intestinal lymphatic system, which reduces conventional first-pass exposure through the liver before testosterone reaches the bloodstream.

However, it is not accurate to say that all oral testosterone completely bypasses the liver or that liver monitoring is never needed. The effect on the liver depends on the specific formulation being used.

Men with a history of liver disease should discuss this with their healthcare practitioner before starting oral TRT. Product-specific prescribing information should also be followed for any recommended liver-related monitoring.

Does Oral Testosterone Need to Be Taken With Food?

Food requirements depend on the specific oral testosterone formulation.

Some oral testosterone undecanoate products are designed to be taken with food because meal intake can affect absorption. Other oral testosterone products may have different instructions, so patients should not assume that all formulations can be taken in the same way.

KYZATREX must be taken with food. Its absorption can be influenced by meal composition, although its Canadian prescribing information does not require a specific high-fat meal.

For more detail on its food requirements, read KYZATREX in Canada: What to Know About Oral Testosterone.

Patients should follow the instructions for their specific prescription and avoid changing meal timing or composition in an attempt to alter testosterone absorption without practitioner guidance.

How Does Oral TRT Compare With Injections?

Oral TRT and testosterone injections can both replace testosterone, but they differ in how the medication is administered, absorbed and dosed.

Oral TRT is taken by mouth and does not require needles. Injections deliver testosterone directly through an injectable route and may be given on a less frequent schedule depending on the prescribed regimen.

The two approaches can also differ in their pharmacokinetic profiles. Oral testosterone levels may change after each dose and can be influenced by gastrointestinal absorption and, for some products, food intake. Injectable testosterone follows a different absorption pattern after each injection.

Both approaches require ongoing monitoring, including testosterone testing and appropriate safety assessments. Dosing should be adjusted according to the specific product, laboratory results and treatment response.

Neither route is universally better. The choice may depend on medical suitability, preferred dosing routine, willingness to use injections, treatment response and practitioner guidance.

How Does Oral TRT Compare With Testosterone Gel?

Oral TRT is taken by mouth, while testosterone gel is applied to the skin and absorbed through it.

Oral testosterone may appeal to men who prefer not to apply a topical treatment each day. It also does not have the same concern about transferring testosterone from treated skin to another person through direct contact.

The two routes differ in several practical ways, including:

1. Oral versus skin absorption
2. Dosing routines
3. Food requirements for some oral formulations
4. Skin application requirements for gels
5. Topical transfer precautions
6. Testosterone monitoring and dose adjustment

Both are forms of external testosterone replacement and require appropriate diagnosis and ongoing monitoring.

The most suitable option depends on individual preference, medical history, treatment response and practitioner assessment.

Oral TRT vs Injections vs Gel

Oral TRT, injections and testosterone gel can all replace testosterone, but they differ in how treatment is administered and managed.

No single route is universally better. The most appropriate option depends on medical suitability, treatment response, dosing preference and practitioner guidance.

Can Oral TRT Affect Fertility?

Yes. Oral TRT can affect fertility because external testosterone can suppress the hormonal signals needed for normal sperm production.

When testosterone is supplied from outside the body, the brain may reduce signalling through LH and FSH. These hormones are important for normal testicular function and sperm production.

As LH and FSH decrease, sperm production may also fall. In some men, this can significantly reduce fertility while treatment continues.

This is not unique to oral testosterone. Injectable and topical TRT can have the same effect because all of these approaches provide external testosterone.

Men who are trying to conceive or who want to preserve future fertility should discuss their reproductive goals with a healthcare practitioner before starting oral TRT.

How Is Oral Testosterone Monitored?

Oral testosterone requires ongoing monitoring to confirm that treatment is effective and to watch for potential side effects.

Monitoring may include:

1. Serum testosterone levels
2. Changes in symptoms and treatment response
3. Hemoglobin, hematocrit or a complete blood count
4. Blood pressure
5. Lipid levels
6. PSA and prostate health when appropriate
7. Liver function tests when relevant
8. Other laboratory tests based on medical history and individual risk factors

The timing of testosterone testing may depend on the specific oral formulation. Some products require blood samples to be taken at a particular time after a dose so that results can be interpreted correctly and used for dose adjustment.

For this reason, patients should follow the monitoring instructions for their specific prescription rather than using a general blood-test schedule for all forms of oral TRT.

Can You Switch From Injections or Gel to Oral TRT?

Yes. Some men may be able to switch from testosterone injections or gel to oral TRT under the guidance of a healthcare practitioner.

The dose used with one TRT route cannot simply be converted directly to another. Oral, injectable and topical testosterone have different absorption patterns, dosing schedules and pharmacokinetic profiles.

Before switching, a practitioner may review:

1. Current testosterone levels
2. Symptoms and treatment response
3. Existing TRT dose and schedule
4. Medical history and treatment risks
5. Fertility goals
6. Reasons for changing treatment routes

After the switch, testosterone levels should be rechecked according to the monitoring instructions for the new oral formulation. Additional safety monitoring may also be required.

Patients should not stop one TRT method or start another on their own. The transition should be practitioner-led so that dosing and follow-up testing can be adjusted appropriately.

Is Oral TRT Better Than Injections or Gel?

No form of TRT is universally better than injections, gel or other treatment routes.

Oral TRT may be more convenient for men who prefer taking a capsule and want to avoid needles or topical application. However, injections and gels may be more suitable for others depending on their health, treatment response and preferred routine.

The choice may depend on:

1. Convenience and dosing preference
2. Treatment response
3. Medical history and potential risks
4. Willingness to use injections
5. Comfort with topical application
6. Monitoring requirements
7. Cost and availability
8. Individual preference

All forms of TRT require appropriate diagnosis and ongoing monitoring. The most suitable option is the one that is medically appropriate, practical for the individual and capable of maintaining testosterone within the intended range.

When Should You Speak to a Healthcare Provider?

You should speak to a healthcare provider if you have symptoms of low testosterone, have received low testosterone results or are considering starting or changing TRT.

Medical assessment is particularly important if you:

1. Have symptoms that may be related to low testosterone
2. Have had one or more low testosterone blood-test results
3. Are considering switching from injections or gel to oral TRT
4. Are trying to conceive or want to preserve fertility
5. Have a history of cardiovascular disease or high blood pressure
6. Have liver disease or previous liver-related concerns
7. Have prostate-related symptoms or other relevant medical conditions
8. Take medications that could interact with testosterone therapy

Testosterone should not be started, stopped or changed without medical guidance. A healthcare practitioner can confirm whether testosterone deficiency is present, determine whether TRT is appropriate and recommend a suitable treatment route and monitoring plan.

Key Takeaways

Oral testosterone replacement therapy is a legitimate prescription TRT route for appropriately diagnosed men, but oral formulations can differ significantly in how they are absorbed, dosed and monitored.

1. Oral TRT provides testosterone by mouth as an alternative to injections or topical treatment.
2. Different oral testosterone formulations should not be assumed to work the same way.
3. Modern testosterone undecanoate formulations use different delivery and absorption approaches than some older oral androgen products.
4. KYZATREX launched in Canada in September 2026 as a newer oral testosterone undecanoate option.
5. KYZATREX is currently supplied in Canada as 150 mg and 200 mg capsules.
6. Oral TRT still requires confirmed testosterone deficiency, practitioner assessment and ongoing monitoring.
7. Oral testosterone is not automatically safer, more effective or more appropriate than injections or gel. The best route depends on individual medical needs, treatment response and preference.

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