Xeno Labs Clenbuterol – 40mcg/100tabs

Recommended Starting Dosage:
20-40mcg per day. Men start with 40mcg daily. Women start with 20mcg daily. Take first thing in the morning on an empty stomach. Never start higher - assess tolerance first.

Dose Escalation Protocol (Step-Up Method):

• Week 1: 20-40mcg daily
• Week 2: 40-60mcg daily
• Week 3: 60-80mcg daily
• Week 4: 80-100mcg daily
• Week 5-6: 100-120mcg daily (max dose)

Maximum Dosage:
120-140mcg daily for men. 80-100mcg daily for women. Never exceed these amounts - higher doses cause serious cardiac stress.

Cycling Methods:

2 Weeks On / 2 Weeks Off: Run Clenbuterol for 2 weeks, then take 2 weeks completely off. This prevents receptor desensitization. Most popular method.

Gradual Step-Up/Step-Down: Increase dose weekly for 5-6 weeks, then decrease by 20mcg per week. Less effective due to receptor downregulation.

When to Take:
Take your entire daily dose in the morning (6-8 AM) to avoid insomnia. Split into 2 doses if over 80mcg daily - morning dose and early afternoon (before 2 PM). Never take after 3 PM or you won't sleep.

With or Without Food:
Take on empty stomach for best absorption. Wait 30-45 minutes before eating breakfast.

Supporting Supplements (REQUIRED):

• Taurine: 3-5g daily (prevents muscle cramps)
• Potassium: 200-400mg daily (Clenbuterol depletes potassium)
• Electrolytes: Drink electrolyte beverages throughout day
• Magnesium: 400mg before bed (helps with cramps and sleep)

Cycle Duration:
2-6 weeks maximum per cycle. Take at least 4 weeks off between cycles to restore receptor sensitivity.

Coming Off:
Don't taper down - just stop when your 2 weeks are up. Your metabolism will gradually return to normal over 1-2 weeks.

Most Common (Especially First 3-5 Days):

• Hand tremors and shakiness (very common, improves after a few days)
• Increased heart rate (resting heart rate goes up 10-20 bpm)
• Sweating excessively, especially at night
• Insomnia and trouble sleeping
• Anxiety, nervousness, feeling jittery
• Headaches
• Muscle cramps (take taurine to prevent)

Serious Side Effects:

• Cardiac hypertrophy (enlarged heart with long-term abuse)
• Dangerous heart palpitations or irregular heartbeat
• Severe high blood pressure
• Hypokalemia (low potassium - very dangerous)
• Chest pain or tightness
• Extreme anxiety or panic attacks

How to Manage:
Start with low dose to assess tolerance. Take taurine and potassium daily. Stay hydrated. Avoid caffeine and other stimulants. Monitor resting heart rate daily - if it goes over 100 bpm at rest, lower your dose. Get blood work to check potassium levels if running multiple cycles.

Critical Warning:
Stop immediately and get medical help if you experience: severe chest pain, extreme difficulty breathing, fainting, severe dizziness, or irregular heartbeat that won't stop.

Active Ingredient:
Clenbuterol Hydrochloride

Dosage Strength:
40 mcg (micrograms) per tablet

Quantity:
50 tablets per bottle

Intended Use:
Primary FDA-approved use: Treating airway obstruction in horses (not approved for human use in USA/UK).
Primary bodybuilding use: Fat loss during cutting cycles, contest preparation, maintaining muscle during calorie restriction, improving cardiovascular performance.

Classification:
Beta-2 adrenergic receptor agonist, sympathomimetic amine, bronchodilator

Mechanism of Action:
Selective beta-2 adrenergic receptor agonist that binds to and activates beta-2 receptors in adipose (fat) tissue, skeletal muscle, and smooth muscle. Activation leads to:

• Increased thermogenesis (heat production) through upregulation of mitochondrial activity
• Enhanced lipolysis (fat breakdown) via hormone-sensitive lipase activation
• Elevated basal metabolic rate (BMR) by 10-15%
• Bronchodilation through smooth muscle relaxation
• Anti-catabolic effects by reducing protein degradation in muscle tissue

Half-Life:
25-39 hours (average ~35 hours) - Long half-life allows once-daily dosing

Time to Peak Plasma Concentration:
2-3 hours after oral administration

Time to Steady State:
Approximately 8 days of daily dosing

Bioavailability:
70-80% oral absorption

Duration of Action:
24-36 hours (effects continue long after plasma peak)

Receptor Downregulation:
Beta-2 receptors become desensitized after approximately 2 weeks of continuous use, reducing effectiveness. This is why 2-week cycling is recommended.

Metabolism:
Primarily hepatic (liver) metabolism

Excretion:
Primarily through urine over several days

Effects on Metabolism:

• Increases BMR by 10-15%
• Elevates body temperature by 0.5-1°F
• Increases fat oxidation rate
• Enhances oxygen uptake and utilization

Cardiovascular Effects:

• Increases heart rate by 10-30%
• May increase blood pressure by 5-15 mmHg
• Increases cardiac output

Molecular Formula:
C12H18Cl2N2O

Molecular Weight:
277.19 g/mol

Chemical Name:
1-(4-Amino-3,5-dichlorophenyl)-2-(tert-butylamino)ethanol

Administration:
Oral tablet, swallow whole with water on empty stomach. Best taken in early morning.

Detection Time:
4-5 days in urine after last dose (can be detected by sports drug tests)

Storage:
Store at room temperature 59-86°F (15-30°C) in a dry place. Protect from light and moisture. Keep in original container. Keep away from children.

Drug Interactions:
Do not combine with:

• Beta-blockers (cancel each other out)
• MAO inhibitors (dangerous interaction)
• Other stimulants like ephedrine or high-dose caffeine (cardiac stress)
• Certain antidepressants (increased side effects)

Also Known As:
Clen, Spiropent, Ventipulmin