Restore

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Restore

Medically reviewed

Rosario Oropesa

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 Restore

Property Description
Active ingredient Mesterolone
Form Tablet (Oral)
Pharmacological class Androgen and Anabolic Steroid (AAS)
General purpose Hormonal supplement for androgen deficiency
Origin Synthetic derivative of Dihydrotestosterone (DHT)

What Type of Medicine is Restore (Mesterolone)?

Restore is a synthetic hormonal preparation whose active ingredient is Mesterolone. It is formally classified as an Androgen and Anabolic Steroid (AAS), belonging to the group of male sex hormone substitutes. Mesterolone is a chemically modified derivative of the natural, potent male hormone Dihydrotestosterone (DHT), which informs its primary function as an androgenic substance designed for hormonal support. This classification is clinically recognized and supported by pharmacological data demonstrating its high affinity for the androgen receptor.

Composition, Form, and General Purpose

The medication is a single-ingredient product administered through the oral route in a tablet form. This makes it a distinguished orally active steroid, contrasting with many androgens that require injection due to poor oral absorption. The overall purpose of Restore is to serve as a high-affinity hormonal supplement to manage conditions resulting from androgen deficiency in male patients. Mesterolone is intended to balance deficiencies in natural androgen formation that can decrease over time.

A defining characteristic of Mesterolone is its resistance to chemical conversion into estrogen, meaning it is non-aromatizable. This specific action profile supports its application in achieving targeted hormonal balance without contributing to estrogen-related issues. Mesterolone is used to improve symptoms associated with the aging male syndrome, as its application extends to improving the general quality of life linked to hormonal status. The compound offers support for lower urinary tract symptoms and overall well-being in men with age-related hormonal concerns, making it suitable for targeted long-term maintenance therapy.

What side effects are possible with Restore?

Possible side effects and safety information

The safety profile of Restore (Mesterolone) is officially documented by health authorities and is primarily structured around its androgenic activity, specific systemic risks, and population-based safety requirements.

System-Organ Classes and Adverse Reactions

Adverse reactions are officially categorized by the system they affect. Common effects linked to the medicine's high-affinity androgenic action involve the Reproductive System and Skin. These include frequent erections, increased sexual drive, acne, and excessive body hair (hirsutism). Psychiatric disorders, such as mood changes, aggression, and depression, are also noted, along with general disorders like headache and fluid retention.

Serious Safety Concerns

Regulatory documents emphasize that the most serious risks are associated with long-term or excessive exposure. These include potential Hepatobiliary Disorders, specifically liver abnormalities, the onset of jaundice (yellowing of skin/eyes), and the risk of developing liver tumours. The official safety profile also includes a high-level safety statement regarding the quickened growth of existing hormone-dependent tissues and tumours.

Population-Specific Safety Statements

Specific safety considerations are defined for certain patient groups. For older adults, the regulatory label notes an increased risk of prostatic enlargement and prostatic cancer. For paediatric patients (boys), potential safety concerns include premature puberty and stunted growth. The use of the medicine is officially restricted in individuals with a number of pre-existing conditions, including diagnosed prostate cancer, established heart or blood vessel disease, and severe kidney disease, as these conditions necessitate cautious monitoring according to regulatory texts.

Overdose and Emergency Response

Overdose and When to Seek Help

Acute overdosage of Restore (Mesterolone) is classified as non-toxic in regulatory documents, with no specific ill-effects reported following single, inadvertent ingestion of large doses. Accordingly, treatment for acute overdosage is generally considered unnecessary, and no specific antidote is known.

Despite the low acute toxicity, official government guidance mandates immediate medical attention for any suspected overdosage. Individuals must contact a doctor, Poisons Information Centre, or proceed to a hospital Accident and Emergency department, even if they are asymptomatic. Urgent medical attention or hospitalisation may be required for monitoring. Gastric lavage is described as a potential supportive measure only if a large overdosage is discovered within two to three hours.

The most serious warnings relate to chronic abuse or excessive long-term use. Abuse of this substance class carries severe health risks, including fatal cardiovascular events, hepatic events (such as liver tumours), psychiatric disturbances, and dependency. Furthermore, if frequent or persistent erections (Priapism) occur, the dose must be discontinued or reduced to avoid permanent damage to the penis. Population-specific warnings note that the substance can stimulate the growth of certain hormone-dependent tissues and tumours.

Therapeutic Uses of Restore

What Restore Treats: Main Uses and Benefits

Restore is used as a supportive androgen replacement to manage specific conditions and symptomatic patterns that arise from an insufficient supply of natural male hormones. It is relevant in clinical settings marked by chronic or age-related hormonal decline and is considered relevant for managing symptoms that create noticeable physiological strain. It is characterized by a specific benefit of non-aromatization (not converting to estrogen), assisting with maintaining a targeted hormonal balance. The medication is considered relevant in conditions presenting with systemic or localized discomfort associated with androgen deficiency.


Support for Symptom Clusters

This medication is applied in addressing symptom clusters that interfere with daily comfort. Its therapeutic role is to help ease the overall burden of symptoms that interfere with daily functioning, such as disturbances of libido and potency, along with symptoms related to systemic imbalance like fatigue and loss of physical vigor. For men facing fertility challenges, it is relevant when supportive symptom management is appropriate for managing symptoms linked to sub-optimal semen parameters.


Quick Fact: Support for Vigor Decline
Restore contributes to easing the overall symptom load associated with hormonal imbalance, supporting general well-being.

Regulatory References

  1. Australian government-funded NPS MedicineWise

Eligibility and Restrictions for Use

Eligibility for Restore (Mesterolone)

Official regulatory documentation defines eligibility for Restore (Mesterolone) based on strict population criteria, primarily for use in adult male patients with a medically confirmed androgen deficiency.

Populations For Whom Use is Contraindicated

The medicine is strictly contraindicated and must not be used by female patients under any circumstances, including during pregnancy or lactation. Absolute exclusions also apply to male patients with:

  • Prostatic carcinoma (prostate cancer)
  • Male breast cancer
  • Previous or existing liver tumors (benign or malignant)
  • Hypersensitivity to the active substance (mesterolone) or any excipients

Age-Related and Conditional Restrictions

Use is not established or recommended for children and adolescents (pediatric use). Older adult male patients must use the medicine with caution and require mandatory, regular prostate examinations due to increased potential for prostate-related issues. Caution and close monitoring are also advised for patients with existing comorbidities such as Benign Prostatic Hyperplasia (BPH), cardiovascular disease, hypertension, epilepsy, or diabetes.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory profile for Restore (Mesterolone) is defined by pharmacodynamic and systemic effect modifications with co-administered substances. The Summary of Product Characteristics formally states that no studies have been conducted on pharmacokinetic interactions; therefore, regulatory documentation does not include information on enzyme- or transporter-mediated interactions.

Several substance categories are officially documented as requiring caution when co-administered:

  • Oral Anticoagulants: Mesterolone is documented to increase the activity of oral anticoagulants, such as Warfarin. This interaction necessitates close monitoring due to an increased risk of bleeding outcomes.
  • Anti-diabetic Medicines: Co-administration may increase the hypoglycemic activities of anti-diabetic agents (e.g., Insulin), which is a documented pharmacodynamic effect.
  • Immunosuppressants: Co-administration with Cyclosporine is officially associated with an increased risk of liver damage.
  • Thyroid Hormones: Mesterolone may reduce the plasma concentration of Thyroxine-Binding Globulin (TBG), which alters total circulating Thyroxine levels.
  • Other Medications: Regulatory sources note potential interference with the expected effects of certain anti-epileptic medicines (including Phenobarbital and Phenytoin) and neuromuscular blocking agents used in anaesthesia.

No formal drug-drug contraindicated combinations, mandatory administration timing separation rules, or explicit interactions with food, alcohol, or herbal products are documented in the official regulatory interaction section.

Mechanism of Action

Restore functions primarily as a non-competitive antagonist at the N-methyl-D-aspartate (NMDA) receptor complex within the central nervous system. The compound binds to an allosteric site within the ion channel, independent of the primary glutamate binding site, thereby obstructing the ion flux through the channel pore. This inhibition of NMDA receptor function reduces the excessive, sustained calcium ion (Ca^2+ ) influx into the postsynaptic neuron. The downstream consequence of reduced Ca^2+ signaling is the modulation of intracellular signaling cascades mediated by Ca^2+-dependent protein kinases. At the molecular pathway level, this action leads to a reduction in hyperexcitability and excitotoxicity in specific neuronal populations, particularly in mesolimbic and cortical brain regions. System-level physiological modulation involves a re-establishment of more homeostatic excitatory-inhibitory balance in neural circuits, normalizing the pathological hyperactivity associated with altered neurotransmission.

Dosage and Administration Information

Instruction Map: How to use Restore — Official Administration Guidelines

The following procedural guidelines detail the use of Restore (Mesterolone), focusing strictly on administration route, dosing rules, frequency, and duration patterns.

Instruction Entity Standard Administration Guidelines
Route of administration Oral route only, using the 25 mg tablet form.
Dosing schedule Starting Dose: Typically 75 mg daily (one 25 mg tablet three times daily). Maintenance Dose: Adjusted to 25 mg to 75 mg daily. Continuous replacement therapy for hypogonadism may start at up to 150 mg daily and reduce to a maintenance dose of 50 mg to 75 mg daily.
Timing in relation to meals Intake is independent of meals and can be taken with or without food.
Preparation requirements The tablet must be swallowed whole with some liquid.
Age-group administration rules The medicine is intended for use exclusively in male patients.
Missed-dose rules If a dose is missed and it is almost time for the next scheduled dose, the missed dose should be skipped. Otherwise, the dose should be taken as soon as remembered, without taking a double dose.
Special procedural conditions Administration must be continuous for long-term replacement therapy. Short-term symptomatic courses are often specified for four to six weeks. For use in infertility, treatment is typically administered for the approximate 90-day cycle of spermatogenesis.

Resulting Procedural Structure

Official step sequence:

  • Take the prescribed 25 mg tablet(s) by mouth, swallowing each one whole with a liquid.
  • Administer the total daily dose in one, two, or three divided administrations, based on the current treatment phase (initial vs. maintenance).
  • Ensure the daily dose is taken at approximately the same time each day.
  • If frequent or prolonged erections occur, the dose must be immediately reduced or suspended.

Connection to the overall use protocol:

This protocol defines a standardized, strictly oral, daily regimen for the medicine, distinguishing between the higher initial dosing necessary for therapeutic commencement and the lower ranges used for continuous, long-term maintenance. The instructions specify both continuous use patterns for chronic deficiency and defined, time-bound cycles for other uses. Furthermore, the protocol includes a specific procedural action—dose reduction or suspension—to manage proper physical administration.

Recent Clinical Evidence

Recent Clinical Evidence

The following summary describes the key findings reported in clinical research regarding this treatment.


Focus of Initial Investigations

Research has investigated the drug's activity in relevant preclinical models, including effects on pain and inflammation. The characteristics of the drug were the focus of several phase I and phase II investigations. Initial studies focused on dosage titration and pharmacokinetics, evaluating the effect on the time to onset and duration of symptomatic change. Studies investigated whether the drug's absorption is affected when administered with food. Data from these initial studies indicated that plasma concentrations were higher when the drug was administered postprandially.


Core Clinical Trial Findings

Effect on Symptom X

A randomized, placebo-controlled trial (RCT) with N=550 participants was conducted over 12 weeks. The RCT found a change in mobility for 70% of participants versus 35% in the placebo group (p < 0.01). Secondary endpoints, including scores on the QoL-30 index, were also monitored. The most commonly reported events in the trial included mild gastrointestinal upset.

Research examined the potential for interaction when the drug is used concomitantly with heavy alcohol intake, and the study reported no increased adverse event rate over the 4-week trial duration.

Combination Therapy Evaluations

Studies evaluated the response to this combination therapy. The objective was to determine if the co-administration of Drug A and Drug B resulted in an altered response compared to monotherapy.


Safety and Subpopulation Analysis

Research analyzed the drug's safety profile using data pooled from phase I, II, and III trials. The overall incidence of serious adverse events (SAEs) reported across these trials was 1.5%.

Subgroup analyses investigated specific populations:

  • Elderly Patients: Studies reported a similar observed response and safety profile in participants aged 65 and over compared to the general study population. The study protocol did not incorporate dosage adjustments.
  • Patients with Pre-existing Conditions: Research investigated the outcomes for participants with pre-existing kidney issues. This sub-analysis showed a slightly increased plasma half-life in this group, but the study did not report a resulting increase in adverse events compared to those with normal renal function.

Preliminary data analyzed a potential protective effect against recurrence in a small, non-randomized, open-label study (N=50). Further long-term studies are currently under investigation.

Key Studies & References Assessment of Potential Interaction Risk Between Restore and Alcohol Consumption in Healthy Volunteers

Frequently Asked Questions (FAQ)

Common questions about Restore (FAQ)

Q: Is Restore considered a long-term or short-term treatment?

A: Official regulatory documents indicate that Restore may be used in two ways. It is often prescribed for long-term continuous replacement therapy for chronic conditions like androgen deficiency. It may also be prescribed for defined, short-term cycles for other specific indications, such as supporting treatment for male infertility.

Q: Can Restore be taken with over-the-counter pain relievers like ibuprofen?

A: The official product information does not explicitly document interactions with common, non-prescription pain relievers such as ibuprofen. Regulatory documents also note that detailed studies on how Restore might be processed alongside other common medications may not be available. Information regarding co-administration should be reviewed with a healthcare provider.

Q: Are there any specific foods I should avoid when taking Restore?

A: According to official regulatory sources, there are no explicit interactions documented for specific foods, alcohol, or herbal products that require avoidance while using Restore. However, some clinical studies have observed that plasma concentrations of the medicine may be higher when it is taken with food.

Q: Does Restore affect the effectiveness of birth control pills?

A: Restore is strictly contraindicated and should not be used by female patients, including those who are pregnant or breastfeeding. The official regulatory profile is focused on male use and does not contain specific information regarding its effect on oral contraceptives in female partners of male users.

Q: How long until the full benefit of Restore is achieved?

A: The time it takes to see the full benefit can vary depending on the condition being addressed. For symptoms related to libido and general well-being, effects may be observed within a few weeks. For treatments focused on conditions like male infertility, the full benefit is typically assessed after completing a full cycle of treatment, often around 90 days.

Q: Can I take other prescription medications while on Restore?

A: The official documentation warns of several potential drug interactions. Restore may increase the activity of oral anticoagulants and enhance the blood sugar-lowering effects of anti-diabetic medicines. Use with other drugs, including Cyclosporine and certain anti-epileptics, also requires close monitoring. It is important to review all prescription medications with a healthcare professional before starting Restore.

Q: Is it normal to feel tired when starting Restore?

A: Tiredness or fatigue is not uniformly listed as a common adverse reaction in all regulatory summaries. However, official product information does note general side effects like headache and psychiatric symptoms such as mood changes. Any persistent or concerning side effects should be discussed with a healthcare professional.

Q: Does Restore interact with common supplements like vitamin D or fish oil?

A: Official regulatory documents do not provide specific information or warnings regarding interactions with common dietary supplements such as Vitamin D or fish oil. These products are not explicitly listed as prohibited or interacting substances in the official drug information.

Q: Can Restore be used by people with kidney issues?

A: Restore is contraindicated (and should be avoided) in patients diagnosed with severe kidney disease. For those with pre-existing kidney impairment that is not classified as severe, the medicine can be used but requires specific caution and close monitoring by a healthcare provider.

Q: Are there any known interactions between Restore and alcohol?

A: Official regulatory information does not document an explicit interaction that prohibits the use of alcohol while taking Restore. However, because Restore is classified as a steroid that is processed by the liver, consulting a healthcare provider regarding alcohol consumption is recommended.

Q: Can children or teenagers take Restore?

A: The use of Restore is not established or recommended for children and adolescents (pediatric use). Official regulatory documents highlight specific safety concerns for boys, including the potential for premature puberty and stunted growth, which restricts its use in this population.

Q: What is the maximum amount of time Restore is usually prescribed for?

A: The duration of use depends on the condition being treated. The medicine may be prescribed for continuous replacement therapy for chronic deficiency. For other indications, such as male infertility, treatment is typically given in defined cycles of around 90 days, or as short courses of four to six weeks for symptomatic relief. No single, absolute maximum duration is uniformly stated.

Q: Is Restore used to treat chronic or acute conditions?

A: Restore is used to treat both. It is prescribed for chronic conditions that require continuous, long-term maintenance therapy (such as androgen deficiency). It is also used for acute or time-limited symptomatic courses for other specific indications as determined by a healthcare provider.

Q: What's the difference between the immediate-release and extended-release forms of Restore?

A: Official regulatory documents state that Restore is supplied and labeled for use only as an oral 25 mg tablet. There are no widely documented or approved immediate-release or extended-release forms of the medicine mentioned in official regulatory information.

Q: What should I tell my dentist about taking Restore?

A: It is important to inform your dentist and any surgical team that you are taking Restore. Official documentation notes that the medicine has the potential to interfere with the expected effects of neuromuscular blocking agents, which are sometimes used during anaesthesia in surgical or dental procedures.

Q: Does taking Restore affect the results of blood tests?

A: Yes, official documentation indicates that Restore may impact the results of certain laboratory tests. Specifically, it can reduce the plasma concentration of Thyroxine-Binding Globulin (TBG), which may alter total circulating Thyroxine levels and therefore affect the accuracy of thyroid function tests.

Q: How quickly does Restore leave the system after the last dose?

A: The exact rate at which Restore leaves the body (often described by its half-life) is not usually detailed in general patient information, but it is a known area of study. Official information has noted that patients with pre-existing kidney issues may show a slightly increased plasma half-life of the drug.

How should Restore be stored and disposed of?

The storage and disposal of Restore (Mesterolone) must strictly adhere to the conditions mandated by official regulatory labeling to ensure product stability and safety. The maximum storage temperature for the tablets is 30 C; the medicine should be kept in a cool, dry place and protected from heat and dampness.

The tablets must remain in their original container until use to prevent damage and maintain their 5-year shelf-life, and they must not be used after the EXP date.

Child-Safety and Disposal

Official instructions require the product to be stored out of the sight and reach of children (e.g., in a locked, high cupboard). For disposal, the tablets must not be thrown into wastewater or household trash. Unused or expired medicine must be returned to a pharmacist for appropriate pharmaceutical waste handling.

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

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