Axiolabs
Axiolabs
Exeplex 25 mg
Product Information
Compound Details
Active Substance
Exemestane
Irreversible Steroidal Aromatase Inhibitor
25 mg/tablet
Strength
25 mg/tablet
Package
50 or 100 Tablets
Form
Oral Tablets
Drug Class
Steroidal Aromatase Inhibitor
Inhibition Type
Irreversible
Manufacturer
Axiolabs
$88.00
Amount :
50 tabs
100 tabs
Shipping :
International
U.S. Domestic
Out of stock
- Overview
- Profile
- Usage
- Safety
- Shipping
- Storage
- FAQ
- Reviews
Product Overview
Exeplex 25 mg by Axiolabs
Exeplex 25 mg is an oral tablet containing Exemestane, manufactured by Axiolabs and supplied as 25 mg per tablet in 50 or 100 tablet packages.
Exemestane Oral
Exeplex 25 mg contains exemestane, a potent, irreversible steroidal aromatase inhibitor. Unlike nonsteroidal inhibitors (anastrozole, letrozole) that reversibly bind the aromatase enzyme, exemestane mimics the substrate androstenedione and is converted by aromatase to a reactive intermediate that covalently inactivates the enzyme. This mechanism-based inhibition produces profound and sustained estrogen suppression, with a single 25 mg dose reducing estradiol concentrations by approximately 62% within 12 hours.
In medical practice, exemestane is FDA-approved for two indications in postmenopausal women: adjuvant treatment of estrogen receptor-positive early breast cancer following 2–3 years of tamoxifen, and treatment of advanced breast cancer that has progressed after tamoxifen therapy. The standard dose is 25 mg once daily after a meal. Exemestane is **not approved for use in men** or for performance enhancement.
In non-medical bodybuilding contexts, exemestane is referenced for managing estrogenic side effects during anabolic steroid cycles and for post-cycle therapy. A 2022 analysis of a French bodybuilding forum reported a mean exemestane dose of **10 mg/day** with a median treatment duration of 84 days among users. A 2025 clinical trial in recreational bodybuilders evaluated clomiphene (a SERM) for hormonal recovery, while a systematic review confirmed that SERM therapy improves testosterone, LH, and FSH in hypogonadal men. Exemestane's role in this context remains off-label and unapproved.
Research Properties of Exeplex 25 mg
- Irreversible steroidal aromatase inhibitor (mechanism-based inactivation)
- FDA-approved for postmenopausal breast cancer at 25 mg daily
- Reduces estradiol by approximately 62% within 12 hours
- No estrogen rebound on cessation due to covalent enzyme inactivation
- 25 mg per tablet for research applications
Product Profile
Exemestane Profile
Exemestane is the only steroidal aromatase inhibitor in clinical use, distinguished by its irreversible mechanism and favorable effects on lipid and bone metabolism compared to nonsteroidal agents.
Irreversible Steroidal Aromatase Inhibitor
Exemestane belongs to the third-generation aromatase inhibitors, which are classified as steroidal (type I, irreversible) or nonsteroidal (type II, reversible). Exemestane is a steroidal, mechanism-based inhibitor that mimics the natural substrate androstenedione. When aromatase processes exemestane, it generates a reactive intermediate that binds covalently to the enzyme's active site, permanently inactivating it.
The pharmacokinetic profile includes a mean terminal elimination half-life of approximately 24 hours, supporting once-daily administration. Exemestane is extensively distributed to tissues and is metabolized by CYP3A4 and aldoketoreductases. The recommended dose in breast cancer is 25 mg once daily after a meal.
Clinical trials have demonstrated exemestane's efficacy in the adjuvant setting. The Intergroup Exemestane Study (IES) showed improved disease-free survival when patients were switched from tamoxifen to exemestane after 2–3 years of tamoxifen therapy. A 2024 presurgical trial found that exemestane at 25 mg three times per week or once per week nearly suppressed estradiol in nonmalignant breast tissue, suggesting lower schedules may be effective for preventive therapy.
Defining Characteristic
Irreversible Mechanism-Based Inactivation
Exemestane's defining pharmacological characteristic is its covalent, irreversible inhibition of aromatase, distinguishing it from reversible nonsteroidal inhibitors like anastrozole and letrozole.
Exeplex 25 mg vs Other Axiolabs Preparations
Axiolabs offers several ancillary compounds referenced in bodybuilding research. Arimiplex (anastrozole) is a nonsteroidal, reversible aromatase inhibitor. Letroplex (letrozole) is a nonsteroidal inhibitor with greater potency. Tamoxiplex (tamoxifen) is a SERM that blocks estrogen receptors rather than inhibiting synthesis. Exeplex provides irreversible steroidal inhibition with no estrogen rebound on cessation.
Dosage & Usage
Exeplex 25 mg Dosage & Usage
The information below is provided for educational reference only. Exemestane is a prescription medicine; medical use requires appropriate diagnosis, clinical supervision and monitoring. Non-medical use falls outside approved indications.
Typical Dosage Ranges
In medically supervised breast cancer treatment, the standard exemestane dose is 25 mg once daily after a meal. For patients receiving strong CYP3A4 inducers such as rifampicin or phenytoin, the dose may be increased to 50 mg once daily. In non-medical bodybuilding contexts, exemestane is referenced at 6.25–25 mg every other day or daily, with a mean reported dose of 10 mg/day in a 2022 forum analysis. These doses are substantially lower than the oncology label and are not standardized or approved.
| Use Case | Common Reference Range | Frequency |
|---|---|---|
| Medical (breast cancer) | 25 mg | Once daily after a meal |
| Medical (with CYP3A4 inducer) | 50 mg | Once daily after a meal |
| Non-medical (not approved) | 6.25–25 mg | Every other day or daily |
Stacking & Cycle Considerations
In non-medical bodybuilding contexts, exemestane is sometimes referenced alongside a testosterone base to manage estrogenic side effects. However, stacking aromatase inhibitors with other estrogen-modulating compounds such as Tamoxiplex (tamoxifen) requires caution, as concurrent use may reduce exemestane efficacy. The 2022 forum analysis reported that exemestane users had a median treatment duration of 84 days.
Managing Side Effects
Common adverse reactions in clinical trials include hot flushes (21%), fatigue (16%), arthralgia (15%), headache (13%), insomnia (12%), and increased sweating (12%). Reductions in bone mineral density are observed with exemestane use, with lumbar spine BMD decreasing by 3.1–3.5% and femoral neck BMD by 4.2–4.6% over 24 months. During adjuvant treatment, women with osteoporosis risk should have BMD formally assessed.
Important
Individual Response Varies
The information above is for educational reference and does not constitute medical advice. Exemestane is not approved for male use or performance enhancement.
Safety & Information
Exemestane Safety Information
Exemestane is a prescription aromatase inhibitor with significant adverse effects. Medical use requires appropriate diagnosis, clinical supervision and monitoring.
Important Safety Information
Exemestane is contraindicated in patients with known hypersensitivity to the drug or excipients. Reductions in bone mineral density are seen with exemestane use, and women with osteoporosis or at risk should have BMD assessed at treatment commencement. Strong CYP3A4 inducers decrease exemestane exposure, requiring dose increase to 50 mg. Exemestane is not recommended for use in premenopausal women.
Important
Non-Medical Use
Non-medical use of exemestane falls outside approved indications. The FDA label does not support its use in men, and a Spanish regulatory review states that approved indications in male athletes do not exist. Use causes marked bone mineral density loss, arthralgia, and cardiovascular effects.
Potential Adverse Effects
Common adverse reactions occurring in ≥10% of patients in clinical trials include hot flushes (21%), fatigue (16%), arthralgia (15%), headache (13%), insomnia (12%), and increased sweating (12%). Cardiac ischemic events occurred in 1.6% of exemestane-treated patients versus 0.6% of tamoxifen-treated patients, and cardiac failure in 0.4% versus 0.3% respectively. Approximately 20% of patients receiving exemestane in advanced breast cancer studies experienced CTC grade 3 or 4 lymphocytopenia.
Conditions Requiring Medical Evaluation
Exemestane should be used with caution in patients with hepatic or renal insufficiency, as AUC was approximately 3 times higher in subjects with moderate or severe impairment. No dose adjustment appears necessary based on experience with doses up to 200 mg daily, but safety of chronic dosing in these populations has not been studied. Women with osteoporosis risk should receive calcium and vitamin D supplementation and BMD monitoring.
Monitoring Considerations
During exemestane therapy, monitoring may include bone mineral density assessment at treatment commencement and periodically thereafter. Lipid profile monitoring may be considered, though exemestane has shown neutral effects on total cholesterol, LDL, and triglycerides in some studies. Blood counts should be monitored, particularly in advanced breast cancer patients where lymphocytopenia is common.
Product Care
Storage & Handling
Store tablets in a closed container at controlled room temperature, away from excessive heat, moisture, and direct light. Keep out of reach of children. Do not use if the packaging is damaged or if tablets appear discolored.
Further Safety Information
Shipping & Authenticity
Shipping & Product Authenticity
Exeplex 25 mg by Axiolabs is supplied through the official distribution chain and shipped with discreet, privacy-focused handling.
USA Domestic 3–5 business days
International 10–15 business days
Order Processing 24–48 business hours
Tracking Provided after dispatch
Direct Supply
Discreet Delivery & Original Packaging
The outer shipping package remains discreet, with no external product details. Products are supplied through the official Axiolabs distribution chain.
What to Expect
- Orders are processed after payment confirmation
- USA Domestic shipping is typically faster when local stock is available
- International orders include tracking, though update frequency may vary by destination
- Multiple warehouses may result in separate shipments when applicable
Authenticity Verification
To verify your Exeplex 25 mg product, use the security code on the packaging and cross-check it on the official Axiolabs site. A credible certificate of analysis should show HPLC purity above 95 percent and mass spectrometry confirmation of the correct molecular weight (296.41 g/mol for exemestane). Original packaging and batch documentation help reinforce product legitimacy.
For complete delivery details, tracking policy, and reshipment terms, please see our Shipping Info page.
Storage
Exeplex 25 mg Storage
Proper storage conditions help preserve tablet integrity and maintain product stability throughout shelf life.
Recommended Conditions
Store tablets in a closed container at controlled room temperature (15–25°C), away from excessive heat, moisture, and direct light. Keep the product in its original packaging until use.
Do not use if the packaging is damaged or if tablets appear discolored or degraded. Keep out of reach of children.
Quick Reference
Do & Don't
- Do store at 15–25°C
- Do keep in original packaging
- Do protect from moisture and light
- Don't expose to excessive heat
- Don't use if tablets appear discolored
- Don't store in bathroom or humid areas
Frequently Asked Questions
Exeplex 25 mg FAQ
Answers to common questions about Exeplex 25 mg, exemestane research, and product details.
What is Exeplex 25 mg used for?
Exeplex 25 mg contains exemestane, a steroidal aromatase inhibitor. In medical practice, it is FDA-approved for adjuvant treatment of postmenopausal women with estrogen receptor-positive early breast cancer and for advanced breast cancer following tamoxifen. In non-medical bodybuilding contexts, it is referenced for estrogen management, though this use is not approved.
How often should Exeplex 25 mg be taken?
The FDA-approved dose is 25 mg once daily after a meal. For patients receiving strong CYP3A4 inducers, the dose may be increased to 50 mg daily. Non-medical protocols reference 6.25–25 mg every other day or daily, but these are not standardized or approved.
Does Exeplex 25 mg require PCT?
Exemestane is not an anabolic steroid and does not suppress testosterone production in the same way. However, it is sometimes referenced in PCT protocols for its ability to raise testosterone levels via estrogen suppression. No controlled studies support exemestane as a standalone PCT agent.
What does exemestane do?
Exemestane irreversibly inhibits the aromatase enzyme (CYP19), which converts androgens such as testosterone to estrogens including estradiol. This reduces circulating estrogen levels, which is the basis for its use in hormone receptor-positive breast cancer.
How long does exemestane take to work?
A single 25 mg dose of exemestane decreases estradiol concentrations by approximately 62% within 12 hours. Chronic dosing settles estradiol at roughly half baseline with a compensatory 60–70% rise in total testosterone. The mean terminal elimination half-life is approximately 24 hours.
Is exemestane the best aromatase inhibitor?
No single aromatase inhibitor is universally superior. Exemestane is the only steroidal, irreversible inhibitor, which may confer different effects on lipids and bone compared to nonsteroidal agents. Anastrozole and letrozole are effective alternatives with different mechanisms.
What is the difference between Exeplex and Arimiplex?
Exeplex (exemestane) is a steroidal, irreversible aromatase inhibitor that covalently inactivates the enzyme. Arimiplex (anastrozole) is a nonsteroidal, reversible inhibitor that competes with substrate for binding. These mechanisms produce different pharmacokinetic and pharmacodynamic profiles.
What is the difference between Exeplex and Tamoxiplex?
Tamoxiplex (tamoxifen) is a selective estrogen receptor modulator that blocks estrogen action at the receptor level. Exeplex (exemestane) inhibits estrogen synthesis by inactivating aromatase. These are fundamentally different mechanisms of estrogen management.
Is 25 mg of exemestane a lot?
25 mg is the FDA-approved daily dose for breast cancer treatment. In non-medical bodybuilding contexts, the mean reported dose is substantially lower at 10 mg/day. The 25 mg oncology dose is often excessive for male physique use outside heavy aromatizing cycles.
What strength is Exeplex 25 mg?
Exeplex 25 mg by Axiolabs contains 25 mg of exemestane per tablet. It is supplied in packages of 50 or 100 tablets. This is a research presentation.
What are the risks of exemestane in men?
Exemestane is not approved for use in men, and a Spanish regulatory review states that approved indications in male athletes do not exist. Use causes marked bone mineral density loss, arthralgia, hypertension, and psychiatric effects. Estrogen is important for male bone health, libido, and cardiovascular function.
Does exemestane cause estrogen rebound?
No. Because exemestane covalently inactivates aromatase, the enzyme must be re-synthesized from scratch after cessation, producing gradual estrogen recovery over days rather than a rebound spike like that seen with reversible inhibitors. This is a distinguishing feature of exemestane compared to anastrozole and letrozole.
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Product Information
Compound Details
Active Substance
Clomiphene Citrate
Selective Estrogen Receptor Modulator (SERM)
50 mg/tablet
Strength
50 mg/tablet
Package
50 or 100 Tablets
Form
Oral Tablets
Drug Class
SERM
Selective Estrogen Receptor Modulator
Receptor Target
Estrogen Receptor
Manufacturer
Axiolabs
Shipped USA Domestic
Axiolabs
Product Information Compound Details
Active Substance Anastrozole Nonsteroidal Aromatase Inhibitor
1 mg/tabletStrength 1 mg/tablet
Package 50 or 100 Tablets
Form Oral Tablets
Drug Class Aromatase Inhibitor
Inhibitor Type Nonsteroidal
Manufacturer Axiolabs
$100.00
Axiolabs
Product Information
Compound Details
Active Substance
Tamoxifen Citrate
Selective Estrogen Receptor Modulator (SERM)
20 mg
Strength
20 mg/tablet
Package
50 or 100 Tablets
1,000 mg or 2,000 mg Total Labeled Content
Form
Oral Tablets
Drug Class
SERM
Selective Estrogen Receptor Modulator
Estimated Half-Life
Approximately 5–7 Days
Manufacturer
Axiolabs
Shipped USA Domestic
Axiolabs
Product Information Compound Details
Active Substance Letrozole Nonsteroidal Competitive Aromatase Inhibitor
2.5 mg/tabletStrength 2.5 mg/tablet
Package 50 or 100 Tablets
Form Oral Tablets
Drug Class Aromatase Inhibitor
Inhibition Type Reversible / Competitive
Manufacturer Axiolabs
$66.00