View Report
January 8, 2025
Measured Result
46.09 mcg
115.23% of label claim
Weight Loss
Kalpa Pharmaceuticals
Latest Laboratory Result 46.09 mcg January 8, 2025 · 115.23% of label claim View
Clenbutaxyl 40 mcg
Product Information Compound Details
Active Substance Clenbuterol Hydrochloride Beta-2 adrenergic agonist
40 mcg/tabletStrength 40 mcg/tablet
Package 100 Tablets 4,000 mcg total labeled content
Form Oral Tablet
Half-Life Approximately 36 Hours
Drug Class Beta-2 Adrenergic Agonist
Manufacturer Kalpa Pharmaceuticals
$94.00
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Product Overview
Clenbutaxyl 40 mcg by Kalpa Pharmaceuticals
Clenbutaxyl 40 mcg is an oral clenbuterol hydrochloride tablet manufactured by Kalpa Pharmaceuticals and dosed at 40 mcg per tablet, supplied in packs of 100 tablets.
Clenbuterol Hydrochloride Oral
Clenbutaxyl 40 mcg contains clenbuterol hydrochloride, a beta-2 adrenergic agonist. Clenbuterol is approved in some countries for the treatment of asthma and other respiratory conditions, but it is not approved by the FDA for human use in the United States. In the US, clenbuterol is approved only as a veterinary medication for horses with airway obstruction.
In non-medical bodybuilding contexts, clenbuterol is commonly referenced for its thermogenic and potential muscle-preserving properties during cutting phases. A randomized controlled trial published in 2025 found that clenbuterol (80 mcg daily) combined with resistance training increased lean mass gains by 1.7 kg compared to placebo over 8 weeks, with more pronounced effects in males than females. However, the same study found no difference in fat mass reduction between clenbuterol and placebo.
Clenbuterol has a long half-life of approximately 36 hours, allowing for once-daily dosing. It is detectable in urine for at least 7-10 days after a single 80 mcg oral dose. As a beta-2 agonist, clenbuterol can produce significant cardiovascular effects including elevated heart rate and blood pressure changes.
Key Benefits of Clenbutaxyl 40 mcg
- Beta-2 adrenergic agonist commonly referenced in cutting phases
- Long half-life of approximately 36 hours for once-daily dosing
- 40 mcg per tablet allows flexible dosing in non-medical contexts
- Lab tested with published potency results
- Manufactured by Kalpa Pharmaceuticals with original packaging
Oral Formulation
Compressed Tablet
Clenbutaxyl 40 mcg is supplied as an oral compressed tablet containing 40 mcg of clenbuterol hydrochloride per unit, packaged in a 100-tablet format by Kalpa Pharmaceuticals.
Product Profile
Clenbuterol Hydrochloride Profile
Clenbuterol is a beta-2 adrenergic agonist with bronchodilator and thermogenic properties. Its long half-life and potent cardiovascular effects distinguish it from other compounds commonly referenced in bodybuilding contexts.
Beta-2 Adrenergic Agonist
Clenbuterol hydrochloride is a beta-2 adrenergic agonist that provides bronchodilating properties along with other effects. It is approved in some countries for asthma treatment but remains unapproved by the FDA for human use in the United States.
In animal studies, clenbuterol administration has been shown to induce fast-twitch fiber transition and skeletal muscle hypertrophy in mice. A 2025 human randomized controlled trial found that 8 weeks of clenbuterol (80 mcg daily) with resistance training increased lean mass (+1.7 kg) and 1RM bench press (+6 kg) and leg press (+16 kg) compared to placebo.
However, the same study found that clenbuterol reduced maximal oxygen uptake by 7% and exercise capacity by 4%, while repressing muscle oxidative capacity markers. These findings highlight the trade-off between potential muscle anabolic effects and negative impacts on cardiorespiratory fitness.
Release Profile
Long Half-Life
Clenbuterol has a half-life of approximately 36 hours, allowing for once-daily dosing. It remains detectable in urine for at least 7-10 days after a single 80 mcg oral dose.
Clenbutaxyl 40 mcg vs Other Kalpa Preparations
Kalpa Pharmaceuticals offers several weight management and performance compounds. The main distinctions involve mechanism of action, regulatory status, and intended application.
For those comparing weight management options, Thyroxyl (T3) is a thyroid hormone that increases metabolic rate through a different mechanism. For non-medical cutting phases, Stanoxyl 10 (stanozolol) and Oxandroxyl 10 (oxandrolone) are non-aromatizing oral anabolics commonly referenced for lean muscle retention.
Laboratory Testing
Clenbutaxyl 40 mcg Lab Reports
Published laboratory reports for Clenbutaxyl 40 mcg are shown below with the test date, measured content and percentage of the product's 40 mcg label claim.
View Report
Laboratory results apply to the specific tested sample represented in each published report and should not be interpreted as a measurement of every tablet or production batch.
Dosage & Usage
Clenbutaxyl 40 mcg Dosage & Usage
The information below is provided for educational reference only. Clenbuterol is not approved by the FDA for human use in the United States. Non-medical use falls outside approved indications and carries significant cardiovascular risks.
Typical Dosage Ranges
In clinical research, clenbuterol has been studied at 80 mcg per day in healthy adults during resistance training interventions. In veterinary medicine for horses, the initial dose is 0.8 mcg/kg twice daily, with stepwise increases up to 3.2 mcg/kg twice daily if needed. In non-medical bodybuilding contexts, clenbuterol is commonly referenced in the range of 40–120 mcg per day, though such use falls outside approved medical indications and carries cardiovascular risks.
| Use Case | Common Reference Range | Frequency |
|---|---|---|
| Clinical study (resistance training) | 80 mcg per day | Once daily |
| Veterinary (equine) | 0.8–3.2 mcg/kg | Twice daily |
| Bodybuilding (non-medical) | 40–120 mcg per day | Once daily |
| Beginner (non-medical reference) | 20–40 mcg per day | Once daily |
Stacking & Cycle Considerations
In non-medical bodybuilding contexts, clenbuterol is commonly used during cutting phases and sometimes stacked with anabolic steroids to help preserve lean muscle while reducing body fat. However, the cardiovascular risks of clenbuterol may compound with other stimulants or compounds that affect heart rate and blood pressure.
Cycle duration in non-medical use is typically referenced at 2–4 weeks on, followed by a similar period off, due to concerns about beta-2 receptor downregulation. A 2025 study confirmed that clenbuterol induces tolerance in beta-2 adrenergic signaling within a 2-week cycle.
Managing Side Effects
Clenbuterol is associated with significant cardiovascular effects including elevated heart rate, blood pressure changes, and potential ECG changes. A 2025 randomized controlled trial found that clenbuterol reduced maximal oxygen uptake by 7% and exercise capacity by 4%.
Other commonly reported side effects in non-medical contexts include muscle tremor, restlessness, and sweating. Blood pressure and heart rate should be monitored during any use. Aromatase inhibitors such as Arimixyl 1 mg are not relevant for clenbuterol.
Important
Individual Response Varies
Dosing strategies and support protocols should be adjusted based on experience level, health status, and bloodwork where possible. The information above is for educational reference and does not constitute medical advice.
Safety & Information
Clenbuterol Hydrochloride Safety Information
Clenbuterol is a beta-2 adrenergic agonist that is not FDA-approved for human use in the United States. It can produce significant cardiovascular effects and has potentially serious adverse cardiac effects at higher doses.
Important Safety Information
Clenbuterol is not approved by the FDA for use in humans in the US. In the United States, clenbuterol is approved only for veterinary use in horses. Clenbuterol has potentially serious adverse cardiac effects at higher doses.
Non-medical use of clenbuterol falls outside approved indications and can substantially increase exposure to cardiovascular adverse effects.
Important
Non-Medical Use
Clenbuterol is not approved for human use in the United States and is prohibited in sports. Non-medical use is associated with serious health risks, including cardiac effects, tremor, and metabolic disturbances.
Potential Adverse Effects
Cardiovascular effects include elevated pulse rate, blood pressure changes, and potential ECG changes. Clenbuterol has potentially serious adverse cardiac effects at higher doses.
In a 2025 randomized controlled trial, clenbuterol reduced maximal oxygen uptake by 7% and exercise capacity by 4%, while repressing muscle oxidative capacity markers including HAD activity and OXPHOS complex V abundance.
Animal studies have shown that clenbuterol administration can cause degenerative lesions in testicular tissue, including distortion of germ cells, reduced germ cell numbers, and decreased spermatogenesis parameters in mice. This suggests potential negative effects on sperm production and fertility.
Other commonly reported side effects include muscle tremor, restlessness, sweating, and tolerance to beta-2 adrenergic effects with repeated use.
Conditions Requiring Medical Evaluation
Clenbuterol should not be used in individuals with cardiovascular impairment due to the risk of tachycardia. Pre-existing heart conditions, hypertension, and arrhythmias require careful evaluation before any consideration of clenbuterol use.
Individuals with hyperthyroidism, diabetes, or seizure disorders should exercise particular caution, as beta-2 agonists can affect metabolic and neurological function.
Monitoring During Therapy
Any use of clenbuterol should be accompanied by monitoring of heart rate, blood pressure, and cardiac function. Bloodwork including electrolyte panels may be advisable given the potential for metabolic effects.
Laboratory testing of the product itself, such as the published potency report shown in the Lab Reports tab, is separate from clinical monitoring of the person using the compound.
Product Care
Storage & Handling
Store in a cool, dry place away from direct light and moisture. Keep tablets in the original packaging until use. Keep out of reach of children.
Further Safety Information
Shipping & Authenticity
Shipping & Product Authenticity
Clenbutaxyl 40 mcg is supplied through the official Kalpa Pharmaceuticals distribution chain and shipped in original manufacturer packaging 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 privacy-focused handling and no unnecessary external product details. Products are supplied through the official Kalpa Pharmaceuticals distribution chain.
What to Expect
- Orders are processed after payment confirmation
- USA Domestic shipping is typically faster when local stock is selected
- 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 Clenbutaxyl 40 mcg product, use the security code on the packaging and cross-check it on the Kalpa official site. Original Kalpa Pharmaceuticals presentation and packaging help reinforce product legitimacy and buyer confidence.
For complete delivery details, tracking policy, and reshipment terms, please see our Shipping Info page.
Storage
Clenbutaxyl 40 mcg Storage
Proper storage conditions help preserve tablet integrity and stability throughout shelf life.
Recommended Conditions
Store Clenbutaxyl 40 mcg in a cool, dry place away from excessive heat, moisture, and direct light. Maintaining stable conditions helps preserve the integrity of the tablets.
Keep the tablets in their original packaging until use. Do not use if the packaging is damaged or if the tablets appear abnormal in color or texture.
Keep out of reach of children. Follow proper handling practices for oral medications.
Quick Reference
Do & Don't
- Do store in a cool, dry place
- Do keep in original packaging
- Do inspect tablets before use
- Don't expose to direct sunlight
- Don't store in humid environments
- Don't use if packaging is compromised
Frequently Asked Questions
Clenbutaxyl 40 mcg FAQ
Answers to common questions about Clenbutaxyl 40 mcg, clenbuterol hydrochloride, dosing, side effects, and product specifications.
What is Clenbutaxyl 40 mcg used for?
Clenbutaxyl 40 mcg contains clenbuterol hydrochloride, a beta-2 adrenergic agonist. It is approved in some countries for asthma treatment but is not approved by the FDA for human use in the United States. In non-medical bodybuilding contexts, clenbuterol is commonly referenced for its thermogenic and potential muscle-preserving properties during cutting phases, though such use falls outside approved medical indications.
How often should Clenbutaxyl 40 mcg be taken?
Clenbuterol has a half-life of approximately 36 hours, allowing for once-daily dosing. In clinical research, clenbuterol has been studied at 80 mcg per day in healthy adults during resistance training. In non-medical bodybuilding contexts, doses are commonly referenced at 40–120 mcg per day.
Does Clenbutaxyl 40 mcg require PCT?
Clenbuterol is not a suppressive anabolic steroid and does not typically require post-cycle therapy in the same way as testosterone or other AAS. However, clenbuterol can affect metabolic and cardiovascular function, and bloodwork may be advisable. If clenbuterol is used in a cycle alongside suppressive compounds, standard PCT protocols should be followed for those compounds.
What does clenbuterol hydrochloride do?
Clenbuterol hydrochloride is a beta-2 adrenergic agonist that provides bronchodilating properties. In animal studies, it has been shown to induce fast-twitch fiber transition and skeletal muscle hypertrophy. In a 2025 human randomized controlled trial, clenbuterol (80 mcg daily) with resistance training increased lean mass (+1.7 kg) and strength compared to placebo.
How long does clenbuterol take to work?
In a 2025 randomized controlled trial, clenbuterol's effects on lean mass and strength were measured over an 8-week resistance training period. Some effects on beta-2 adrenergic signaling may occur within days, but tolerance develops with repeated exposure within a 2-week cycle.
Is clenbuterol the best fat burner?
There is no single fat burner that is universally best. A 2025 randomized controlled trial found that clenbuterol did not significantly reduce fat mass compared to placebo (p = 0.614). Other compounds such as Thyroxyl (T3) work through different mechanisms. The appropriate approach depends on individual goals and health status.
What is the difference between clenbuterol and T3?
Clenbuterol is a beta-2 adrenergic agonist that affects heart rate, bronchial smooth muscle, and potentially muscle protein metabolism. T3 (liothyronine) is a thyroid hormone that increases metabolic rate through thyroid hormone receptors. Both are commonly referenced in non-medical cutting contexts, but their mechanisms, side effect profiles, and risks differ significantly.
What is the difference between clenbuterol and albuterol?
Both clenbuterol and albuterol are beta-2 adrenergic agonists, but clenbuterol has a much longer half-life (approximately 36 hours vs. several hours for albuterol). Clenbuterol is not FDA-approved for human use in the US, while albuterol is approved for asthma treatment. The long half-life of clenbuterol increases the risk of cumulative cardiovascular effects.
Is 40 mcg of clenbuterol a lot?
A single 40 mcg tablet represents half of the 80 mcg daily dose studied in a 2025 randomized controlled trial. In non-medical bodybuilding contexts, 40 mcg per day would be considered a low starting dose, with common reference ranges extending to 120 mcg per day. Even at lower doses, clenbuterol carries cardiovascular risks.
What strength is Clenbutaxyl 40 mcg?
Clenbutaxyl 40 mcg is labeled at 40 mcg of clenbuterol hydrochloride per tablet. It is supplied in packs of 100 tablets, giving 4,000 mcg of total labeled clenbuterol content per pack.
Does clenbuterol affect sperm?
Animal studies have shown that clenbuterol administration can cause degenerative changes in testicular tissue in mice, including disruption of germ cell arrangement, reduced germ cell numbers, and decreased spermatogenesis parameters. These findings suggest potential negative effects on sperm production and fertility, though human data are limited.
Will Clen show up in a drug test?
Yes, clenbuterol is detectable in urine for at least 7-10 days after a single 80 mcg oral dose. It is prohibited in sports by the World Anti-Doping Agency and is included in standard doping control panels.
Is Clenbutaxyl 40 mcg lab tested?
Yes. A published laboratory report dated January 8, 2025 measured Clenbutaxyl 40 mcg at 46.09 mcg, equivalent to 115.23% of its 40 mcg label claim. The complete report can be viewed in the Lab Reports tab. Laboratory results apply to the tested sample represented by the individual report and should not be interpreted as a measurement of every tablet.
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Kalpa Pharmaceuticals LTD, India
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April 3, 2019
This was my first experience with Clen and I was looking for a little training bump off cycle. The stuff is definitely real as I and a lady friend I shared it with both felt its effects. We used it as a pre-workout and it gave a moderate stim/ push in the gym. Felt jittery and warm in 30 min or so. I didnt use it long enough or attempt to taper it up to comment on fat loss or body changes i could contribute to it. The clenbutaxyl tabs are 40mcg and pretty small so i just started with the whole tab and that was pretty strong for me and gave me a nasty headache. So I split it to go to 20mcg and I did better with that.
Love the Kalpa orals. Always good potency with consistent expected effects. I esp like the color coding of the different products so i can empty some into an aspirin container or something and feel secure carrying them with me and easily remember what ive got there not like other brands that are all the same size white tabs with the same markings that get me confused.