Andriol Testocaps

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Andriol Testocaps

Medically reviewed

Marina Burgos

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Andriol Testocaps

Quick Facts

Property Description
Active ingredient Testosterone undecanoate (TU)
Form Soft gelatin capsule (Oral)
Pharmacological class Androgen and Anabolic Steroid
General purpose Hormone Replacement Therapy (TRT)
Origin Synthetic testosterone derivative (ester)

What Type of Medicine is Andriol Testocaps?

Andriol Testocaps is a prescription-only medication classified pharmacologically as an androgen and an anabolic steroid, serving specifically as an agent for testosterone replacement therapy (TRT). This preparation belongs to the class of sex hormones, and its fundamental purpose is to supply replacement for the crucial endogenous androgen when the body's natural production is insufficient. This oral formulation is indicated for testosterone replacement in males with primary and secondary hypogonadism. The medication is used to normalize testosterone levels, addressing the symptoms of deficiency.

The classification as an androgen dictates that Andriol Testocaps' core function is to supplement the deficient hormone; it is designated as a single-active-ingredient product for managing conditions associated with confirmed androgen deficiency. This treatment is typically used in a scenario where adult males require normalization of circulating testosterone.


Composition and Unique Oral Formulation

The active ingredient in this medication is Testosterone undecanoate (TU), which is a synthetic ester of testosterone contained within a soft gelatin capsule for oral administration. Unlike most other testosterone compounds, the Testosterone undecanoate derivative is classified as a pro-drug and is dissolved in a specific oil solution within the capsule to facilitate its distinct absorption pathway. This unique composition is a key differentiating factor.

This specific oral formulation is engineered to leverage the lipid-soluble nature of the ester, enabling absorption primarily through the intestinal lymphatic system. This distinctive route effectively bypasses the first-pass liver metabolism, preventing the rapid deactivation that severely limits the effectiveness of traditional non-esterified oral forms. This mechanism ensures that a clinically relevant quantity of the androgen reaches the systemic circulation to fulfill its essential replacement function.

What side effects are possible with Andriol Testocaps?

Possible Side Effects and Safety Information

Andriol Testocaps (testosterone undecanoate) may cause side effects, though not everyone experiences them. It's important to discuss any concerns with your doctor, as many adverse effects resolve with dosage adjustment or discontinuation.


Common Side Effects

The most frequently reported side effects include changes related to testosterone's hormonal effects and the oral formulation:

  • Skin changes: Acne, oily skin, increased body hair growth (hirsutism), or male-pattern baldness.
  • Gastrointestinal issues: Nausea, mild abdominal pain, or oily stools (due to the capsule's oily carrier).
  • General/Other: Weight gain, headache, or fluid retention (edema), which may manifest as swollen ankles or feet.

Serious Side Effects and Warnings

Contact your healthcare provider immediately if you experience signs of more serious complications:

  • Cardiovascular Risks: Testosterone use is associated with an increased risk of serious cardiovascular events, including heart attack or stroke. Symptoms like chest pain, shortness of breath, sudden severe headache, or numbness/weakness in an arm or leg require urgent attention.
  • Blood Clots: Testosterone may increase the risk of thrombosis (blood clots), such as deep vein thrombosis (DVT) or pulmonary embolism (PE).
  • Prostate and Urologic Concerns: Worsening of pre-existing benign prostatic hyperplasia (BPH) symptoms (e.g., increased urination difficulty) or an increase in Prostate-Specific Antigen (PSA) levels. Regular prostate monitoring is essential.
  • Liver Function: Signs of liver problems, such as jaundice (yellowing of the skin or eyes), dark urine, or persistent nausea/vomiting.
  • Polycythemia: An abnormal increase in red blood cell count (hematocrit), requiring blood tests for monitoring.

Contraindications and Precautions

Andriol Testocaps is contraindicated (should not be used) in patients with known or suspected prostate cancer or male breast cancer. It is also not intended for use in women, especially those who are pregnant or breastfeeding, due to the risk of fetal harm. Use with caution is necessary for individuals with a history of heart, liver, or kidney disease, as these conditions may be worsened by fluid retention.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory profile for an overdose of Andriol Testocaps (Testosterone Undecanoate) is characterized by low acute toxicity following oral ingestion. Manifestations of acute overdose are generally restricted to mild and temporary gastrointestinal disturbances.

These documented signs include nausea and vomiting, as well as oily bowel motions and diarrhoea, which are primarily attributed to the large amount of oil-based excipient contained in the capsule formulation.

Regulators specify that an acute ingestion of an excessive dose is typically not classified as a severe medical emergency. No specific life-threatening outcomes are documented in the official labeling for acute oral overdose.

Required Emergency Actions

The necessary immediate response is to seek professional medical help by consulting a doctor or by contacting a national Poisons Information Centre. The primary intervention described by regulatory authorities is the termination of the medicine or a reduction in dosage.

Official prescribing information confirms that no specific antidote is known or required, and management should focus on providing symptomatic and supportive treatment for the observed disturbances. This official guidance establishes that the risk of acute overdose requires professional advice rather than urgent emergency services.

Therapeutic Uses of Andriol Testocaps

What Andriol Testocaps Treats: Main Uses and Benefits

The fundamental purpose of Andriol Testocaps is to provide Testosterone Replacement Therapy (TRT), specifically addressing the systemic consequences of male hypogonadism where the body fails to produce sufficient levels of testosterone. This therapy may assist in normalizing circulating testosterone levels and may help with managing symptoms associated with this deficiency. The treatment is commonly used across conditions presenting with chronic or unstable symptom patterns.

The primary therapeutic focus is providing symptomatic support for confirmed androgen deficiency, which is relevant for easing challenging symptoms that interfere with daily functioning. This includes managing sexual health deficits (such as reduced libido and erectile difficulty), restoring physical energy and function (addressing chronic fatigue and muscle loss), and stabilizing mood and cognitive clarity (assisting with low mood and poor concentration).

“Symptomatic relief in this domain may assist with maintaining a sense of stability when symptoms are more noticeable.”

The medication is relevant in clinical settings that involve acute or unstable symptom patterns, offering supportive relief when the deficiency produces significant symptomatic burden.

Quick Fact: Relief for Key Symptoms
Physical Assists with managing the loss of muscle mass and strength, and addressing fatigue.
Sexual Supports management of symptoms related to reduced libido or erectile dysfunction.
Cognitive Relevant for easing low mood and difficulties with concentration.

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Andriol Testocaps is officially allowed for use only in adult males with a confirmed diagnosis of primary or secondary hypogonadism, which is testosterone deficiency related to structural or genetic causes. Its use is specifically not established and generally not recommended for men with low testosterone levels attributed solely to aging, lacking a specific underlying pathology.

Populations and Conditions for Whom Use is Prohibited

The medicine is strictly contraindicated in men with known or suspected carcinoma of the prostate or breast. Its use is also prohibited in all women, including those who are pregnant or breastfeeding, due to the regulatory risk of fetal virilization. Individuals with known hypersensitivity to the drug or its components are also excluded from treatment.

Use Under Restriction and Monitoring

Caution and close monitoring are mandatory for specific patient groups. Patients with severe cardiac, hepatic, or renal insufficiency must use the medication with restriction, and treatment should be immediately discontinued if fluid retention or oedema occurs. For prepubertal boys, the safety profile is not fully established, and use requires close monitoring of skeletal maturation to prevent premature epiphyseal fusion. Limited clinical experience also exists regarding the safety and efficacy of the medicine in men over 65 years of age.

What should I know about interactions with other medicines?

Interactions with other medicines and products

This section outlines the officially documented interaction patterns for Testosterone Undecanoate, strictly as detailed in government regulatory labels.


Documented Pharmacodynamic and Exposure-Altering Interactions

Interacting Substance/Class Official Interaction Outcome (Regulatory Statement)
Oral Vitamin K Antagonists (e.g., Warfarin) Co-administration may enhance the anticoagulant action, necessitating frequent monitoring of coagulation parameters.
Insulin / Antidiabetic Medicines May improve glucose tolerance, resulting in a decreased required dosage of the antidiabetic medicine.
Corticosteroids (including ACTH) Concurrent use leads to an additive pharmacodynamic effect, increasing the risk of fluid retention (oedema).
Medicines that May Also Increase Blood Pressure Concomitant administration can result in additional increases in blood pressure.

Non-Drug Interactions and Restrictions

Restriction Type Regulatory Requirement
Mandatory Food Interaction The capsule must be taken with food to ensure adequate systemic absorption and prevent decreased testosterone exposure.
Contraindicated Combinations No medicinal products are explicitly listed as contraindicated (absolutely prohibited) due to drug-drug interaction risk.

Population-Specific Cautions

The risk of enhanced fluid retention when co-administered with Corticosteroids is specifically noted as a heightened caution in patients with pre-existing cardiac, renal, or hepatic disease.

Mechanism of Action

The physiological effects of the medicine originate from its role as a hormone replacement agent, engaging three primary mechanistic domains: genomic signaling, enzymatic metabolism, and neuroendocrine feedback.

Genomic Signaling via Androgen and Estrogen Receptors

The primary action begins when the active hormone, testosterone (T), and its metabolite, dihydrotestosterone (DHT), act as agonists at the intracellular Androgen Receptor (AR). This molecular interaction directly influences gene transcription in the cell nucleus, initiating protein synthesis and facilitating nitrogen balance modulation in muscle and bone tissue. A portion of T is also converted by Aromatase into Estradiol (E2), which subsequently modulates separate estrogen receptors, contributing to bone mineral density regulation and modulating CNS pathways associated with sexual function.


Enzymatic Metabolic Activation and Endocrine Control

The drug's mechanism relies on the enzymatic conversion of T into two distinct, active metabolites by 5-alpha reductase (producing DHT) and Aromatase (producing E2). This cascade ensures a broad physiological reach across multiple receptor systems. Furthermore, the circulating hormone levels exert a powerful negative feedback signal on the Hypothalamus and Pituitary Gland, suppressing the production of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH), thereby modulating the body's overall endocrine balance.


Mechanistic Limitation: Dependency on Signaling Enzymes

The full expression of the androgenic mechanism is constrained by the required activity of key enzymes. The effect in DHT-dependent tissues relies on the uninhibited function of 5-alpha reductase. Because the primary effects require the modulation of gene transcription and the synthesis of new structural proteins (a genomic mechanism), the resulting physiological changes, such as in muscle and bone density, are a consequence of the genomic mechanism, requiring time for protein synthesis.

Dosage and Administration Information

Andriol Testocaps are an oral form of testosterone replacement therapy and must be taken exactly as prescribed by a healthcare professional. General instructions for administration focus on ensuring proper absorption and maintaining steady levels of the medication through a specific dosing schedule.

Administration and Dosage Rules

Guideline Official Instruction
Route & Method Swallow the capsule whole with some water or other drink; do not chew.
Timing with Meals The capsules must be taken with a meal to allow the active substance to be taken up by the body.
Frequency & Division The total daily dose is typically divided and taken in two portions: one half in the morning and the other in the evening.
Uneven Doses If the total daily dose is an odd number of capsules, the larger dose should be taken in the morning.
Dosing Schedule An initial dosage of 120–160 mg daily is generally given for two to three weeks, followed by an individualized maintenance dosage of 40–120 mg daily.
Dose Adjustment The final maintenance dose is determined by your doctor based on clinical response and regular monitoring of testosterone blood levels.

Missed Dose Instructions

If you forget to take a capsule, you should take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and take only the next scheduled dose. Do not take a double dose to make up for a forgotten one.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Andriol Testocaps


Evidence for Use in Male Hypogonadism

The primary research base involves clinical trials and systematic reviews focused on its evaluation in men with confirmed low testosterone levels, a condition known as male hypogonadism. These studies include both individuals with primary (testicular) and secondary (pituitary/hypothalamic) causes of deficiency. Researchers conducted Randomized Controlled Trials (RCTs)—which often compare the medicine against a placebo—in research that has explored for managing confirmed testosterone deficiency.

Study Endpoints: Effects on Biomarkers and Symptoms

A major focus of the research was on biomarker levels. Studies monitored blood samples over time to study whether the concentration of total testosterone was maintained within the standard range for adult males. Beyond these objective measurements, research also examined patient-reported outcomes. Clinical trials used validated questionnaires to study how patients reported changes in specific symptoms, such as libido, erectile function, and general well-being. Research also explored outcomes related to functional measures, such as bone density and changes in body composition (fat and lean muscle mass).


Long-Term Research and Follow-up Durations

Research on this oral formulation typically includes observation periods of defined time intervals. Many of the core efficacy studies, including RCTs, were designed to track effects over short-term periods, such as three to six months. Studies have included longer observation periods in extension phases that span up to one or two years. These longer studies monitor the consistency of the measured outcomes, such as the patterns of testosterone levels and the longevity of reported symptom changes over intermediate periods.

Evidence Gaps and Areas of Scientific Uncertainty

While research describes patterns related to testosterone measurement and symptom evaluation, there are areas where data are still emerging and certainty remains low. One key limitation is the short follow-up duration of many initial trials, meaning long-term outcomes extending beyond one to two years are not fully established. Research exploring broader outcomes, such as measurements of generic quality of life or functional capacity indices, reported mixed or inconsistent findings across different studies. Lastly, long-term effects on major health concerns, such as cardiovascular events or overall mortality, are still subject to ongoing scientific research and are not fully characterized by the existing data.

Key Studies & References

  1. Proposed PI Ver.1 - ANDRIOL® TESTOCAPS (Summary of Product Characteristics and Clinical Data)

Frequently Asked Questions (FAQ)

Common questions about Andriol Testocaps (FAQ)


Q: What is the main difference between Andriol Testocaps and other testosterone treatments, like injections or gels?

The key difference is the way the body absorbs the medicine. This oral capsule is uniquely designed to be absorbed primarily through the intestinal lymphatic system. Official product information notes that this route allows the medicine to bypass the rapid processing by the liver (first-pass metabolism), which prevents the quick deactivation associated with some older oral forms of testosterone.

Q: Do I need to take Andriol Testocaps with a specific type of food?

Yes, official regulatory labeling specifies that the capsules must be taken with a meal to ensure proper absorption into the body. Studies further indicate that consuming the dose with a meal that contains sufficient fat is necessary for the active substance to be taken up effectively. Official guidance emphasizes that taking the capsule without food may lead to inadequate systemic absorption of the active substance.

Q: What happens to the body's natural testosterone production when taking an external testosterone replacement like Andriol?

Introducing external testosterone replacement suppresses the body's own hormone production. Official documents describe that the medicine exerts a negative feedback on the pituitary gland in the brain. This action suppresses the release of hormones (LH and FSH) that normally signal the testicles to produce testosterone.

Q: Why are regular blood tests, such as PSA and blood cell count, necessary while on this treatment?

Regulatory documents describe that regular blood monitoring is required to detect potential changes. Monitoring Prostate-Specific Antigen (PSA) helps check for possible prostate issues, as testosterone can affect the prostate gland. Regular checks of the red blood cell count are also necessary to monitor for the risk of polycythemia, which is an abnormal increase in red blood cells.

Q: How quickly can one expect to see an improvement in energy levels after starting the medicine?

Official patient information indicates that relief of symptoms associated with testosterone deficiency, such as tiredness or depressed mood, may begin within a few days of starting treatment. Evidence indicates that the maximal beneficial effects are typically reported after weeks to months of consistent use.

Q: Is it common for Andriol Testocaps to cause high blood pressure?

High blood pressure (hypertension) is explicitly listed in regulatory documents as a potential side effect associated with the use of this medicine. Regulatory information indicates that caution is necessary when the medicine is used in men who already have existing high blood pressure (hypertension).

Q: Is it true that taking this oral capsule avoids the liver problems associated with older oral testosterone pills?

This formulation is designed to bypass the first-pass liver metabolism, which caused toxicity concerns with older oral androgens. Official clinical reviews and studies suggest that newer formulations of oral testosterone undecanoate generally do not show clinically significant liver toxicities, which is a distinction from some older oral androgens.

Q: Can Andriol Testocaps interfere with or affect sleep patterns, such as worsening sleep apnea?

The regulatory labeling explicitly states that there is insufficient evidence to make a safety recommendation regarding the use of this medicine in men with sleep apnea. Due to the known association between testosterone therapy and conditions that may affect sleep, caution should be used, particularly in patients with existing risk factors such as obesity.

Q: What should I do if I experience unexpected hair loss while on the medication?

While official documents list male-pattern baldness as a possible side effect, Patient Information Leaflets instruct users to report any side effects or concerns promptly to their doctor or pharmacist. This allows for clinical evaluation, which is consistent with regulatory guidance.

Q: Is there a risk of addiction or misuse associated with Andriol Testocaps?

Official warnings state that testosterone has been subject to abuse when taken at doses higher than those recommended for deficiency treatment. Abuse of this class of medicine may lead to serious adverse effects, and dependency and withdrawal symptoms have been reported upon discontinuation.

Q: Can this medication affect blood sugar levels for someone with diabetes?

Official documents note that co-administration with insulin or other antidiabetic medicines may improve glucose tolerance. The medicine’s potential effect on blood sugar levels is a known interaction that may necessitate dosage adjustment of co-administered antidiabetic medicines by a prescribing doctor.

Q: Can taking Andriol Testocaps potentially impact fertility or sperm count?

Official side effects sections indicate that androgen therapy can lead to disturbed formation of sperm and a decreased amount of sperm in the seminal discharge. This is a recognized consequence of the medicine's action in suppressing the pituitary hormones (LH and FSH) that regulate natural sperm production.

Q: Can Andriol Testocaps be used by adolescents with delayed puberty?

While the safety and efficacy are not fully determined in children and adolescents, the medicine has been used in this population under strict medical supervision. Official guidance indicates that pre-pubutal boys using the medicine must be closely monitored for accelerated skeletal maturation (bone growth).

Q: Is it safe to use Andriol Testocaps for a very long period, such as several years?

Official clinical trial data generally includes follow-up periods of up to one to two years. Regulatory documents indicate that the long-term safety and effectiveness of the medicine beyond this time frame have not been fully established and remain a subject of ongoing scientific research.

Q: Is a painful or prolonged erection a possible side effect of this treatment?

Yes, official side effect listings note that a prolonged, abnormal, painful erection of the penis (Priapism) is a possible serious side effect associated with the use of testosterone. This is considered a medical event that should be reported immediately.

Q: Do older men have a higher risk of prostate-related side effects from Andriol Testocaps?

Official warnings state that extra supervision by a doctor is necessary in the treatment of elderly men. This is because androgens may increase the size of the prostate gland, and close monitoring is essential to watch for problems like difficulty passing urine.

How should Andriol Testocaps be stored and disposed of?

Storage and Disposal of Andriol Testocaps

Official regulatory labeling dictates specific conditions for storing Andriol Testocaps to maintain the stability of the testosterone undecanoate formulation. The medication must be stored at a temperature below 30°C; it is required not to refrigerate or freeze the capsules.

Required Handling and Container

Requirement Status
Temperature Below 30°C
Protection Store in the original package, protected from light.
Child Safety Keep out of the sight and reach of children.

The packaging must be maintained, meaning the blister strip should remain in the outer carton to provide protection from light. Unused or expired capsules must be discarded by returning the product to a pharmacy or specialized waste disposal program. This prevents contamination, as the product must not be thrown away with household waste or disposed of in wastewater.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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