Clenbuterol is a bronchodilator and β2-adrenoceptor agonist used to treat breathing conditions like Inflammatory Airway Disease and Recurrent Airway Obstruction. This drug is also used to treat asthma, and has been an approved treatment and prescription for it since 1977 – though only outside of the US.
Based on research, we know Clen had potent anabolic effects on the animals it was tested on as they lost lots of fat and built tons of skeletal muscle tissue. These results compelled many bodybuilders who were enticed to use this breathing medicine as a muscle-building steroid instead. Now, many purchase Clenbuterol from the black market to stack alongside fat-burning compounds during their cutting cycles.
Clenbuterol popularized so much in recent years that even Hollywood celebs tried their luck with it as it is known to bring rapid and positive transformation to the physique.
This said, let us make clear the effects Clen had on animals are not quite what we see in people as while it undoubtedly burns fat at an impressive speed, how well it works as a muscle-builder is still a debated, and questionable, topic amongst experts and bodybuilders alike.
We say this as while some claim to have no anabolic effects from the drug, there are others who swear by the results and muscle-building power Clen has in store. As such, we can likely and safely presume the true results lie in the middle as while Clen has anabolic traits and properties, it is not as powerful a muscle-builder as anabolic steroids that are more androgenic-natured.
This said, the benefits of Clen shine during cutting cycles as it can help bodybuilders get lean without enduring muscle loss in the process, though tremendous muscle and strength gains are in fact unlikely. On a final note, most find Clen to be convenient as it often comes in oral form, though those who prefer other dose styles can also find it in syrup or injectable form.

Clenbuterol Side Effects
- Diuretic effects.
- Enhanced fat loss.
- Increased energy.
- Suppressed appetite.
- Improved blood flow.
- No testosterone suppression.
Enhanced Fat Loss
This drug stimulates the central nervous system.
As such, more adrenaline is likely to follow doses.
It also raises the body temp but only by about a degree.
When a higher body temp occurs, the body will enter a state of trying to sustain homeostasis, which it does by stimulating sweat glands in aim to cool itself down to a safe and normal temperature.
As the body tries to cool itself, calorie expenditure, as well as the basal metabolic rate, will increase.
This means a bodybuilder on Clen is likely to burn lots of calories even during times of rest and sleep.
An elevated metabolism also makes it easier for the body to get by on fewer calories so it ideal for those who want to cut or burn fat. Clen – like most beta-2 agonists – also has diuretic effects that let it burn fat directly, given the fact it converts triglycerides into free fatty acids.
Improved Blood Flow
Clen increases adrenaline levels and places the body in a fight-or-flight state.
But thankfully, the body will enhance blood flow as a result to ensure survival.
This improved blood flow may enhance the endurance of even weak muscles.
Which in turn allows those using it to do more repetitions per workout session!
Note: Low endurance may be had if the heart rate or blood pressure of the user rises too high. For this reason, many take daily supplements to mitigate these risks. You may want to as well if you cycle Clen!
Clen users burn fat fast and can often handle bigger pumps due to greater blood circulation. This is good news as the more reps and pumps one can do, the more likely new muscle growth will follow.
Enhanced blood circulation will also help the fascia muscle (a thin, connective tissue later that surrounds and adjoins bones, nerves, muscles, and blood vessels) to expand. As it does, it will deeply push against fascia tissue – and in turn – increase the flexibility of the tissue – and its ability to produce larger muscles.
On a side note, those who cycle Clen often report speedy post-workout recoveries.
Most also say they require less sleep while having even more energy in the morning.
Note: As with most compounds, ongoing use of Clen without any breaks is not advised as this can cause vasoconstriction to occur due to rising cortisol levels. As such, the body should be given enough time to recover between cycles to help negate this condition that can cause fatigue and blood flow impairment.
Enhance Energy
Pre-workout medicines and supplements are popular among gymgoers as they contain stimulants like caffeine that make more pumps and longer workout sessions easier.
Such energy enhancers work by stimulating the central nervous system. This, in turn, releases more adrenaline, from which a person reaps a strong yet often short-lived burst of energy. Clen works in a similar way but to a greater degree as it is more powerful than most compounds in the market today.
No doubt – Clen is a powerful stimulant that brings game-changing energy levels to those who cycle it. But be warned and mindful, a hard crash followed by low and dull energy levels often emerge once its effects taper; it is this reason those who use it are at a high risk of building a physical dependence to it.
One perk of Clen, though, is it can allow a person to burn more fat by enabling longer workout sessions. For example, it is not uncommon for a person to comfortably go from a typical thirty-minute workout to ones forty-five minutes to an hour in duration. Longer workouts allow more calories to be burned away!
Appetite Suppression
Clenbuterol stimulates beta 2-androgenic receptors – an effect that can cause satiety levels to fluctuate.
And while those who cycle Clenbuterol will burn more calories – many report having a reduced appetite.
This is good news for those who often crave fatty or unhealthy foods as they will have little desire to eat.
Most Clenbuterol users also report staying full for longer – so you might find yourself eating fewer meals.
Diuretic
Clen is a versatile compound that burns fat and flushes extracellular water from muscles. This effect is great news for most as this means muscles will appear lean, toned, and more defined and pronounced.
Its diuretic effects are largely due to the sheer amount of sweating it causes.
This should be kept in mind as if you ever cycle Clen you need to drink plenty of water.
Remember – the body loses salt as it sweats – which can cause cramps and dehydration.
As such, those using Clen need to drink enough water to keep their body fully hydrated.
On a final note, water loss from Clen will return post-cycle, so its effects are temporary.
No Testosterone Suppression
A major risk of most anabolic steroids is the shutdown of free testosterone production in the body. This occurs with most steroids in the market, and it is a risk worth mentioning as a shutdown of testosterone production can cause a user to endure symptoms for weeks to months after a cycle ends – however long it takes test levels to recover! It is this very reason most bodybuilders do post-cycle therapy as doing so, effectively, enables the body to recover much more speedily – at times – in a matter of just a few weeks.
However, this is no concern with Clenbuterol. Unlike most anabolic steroids, it does not inhibit or impair the ability of the body to produce testosterone. This means side effects are often minimal and tolerable for most people who are able to take it – and recover – without having to rely on PCT medicines to do so.

Clenbuterol Side Effects
- Anxiety.
- Insomnia.
- Faster heart rate.
Anxiety
This is a common symptom of Clenbuterol as it arouses the central nervous system.
This can put the body in fight-or-flight mode, and may negatively impact mental health.
A racing heartbeat – or palpitations – can also induce anxiety by falsely causing a person to think a heart attack is looming. Given this and the above risks, many Clen users take a sedative to reduce anxiety by calming the central nervous system. However, do know this can reverse and counteract the gains and thermogenic effects of Clenbuterol, which in turn, also limits the amount of fat the body is able to burn.
Remember, anxiety and depression are symptoms that may follow the end of a Clen cycle as the body will not produce as much dopamine as it did with the compound in the body. Also, shakes and trembles are common with Clenbuterol as it stimulates adrenaline production, which can cause shaking to follow.
Insomnia
Insomnia and hyperactivity, caused by an excessively stimulated central nervous system, are side effects that often come along with using Clenbuterol. Call it the nature of the beast if you will. Given these side effects, most take it early in the day in aim to more easily fall asleep at night. However – Clenbuterol has a long half-life at thirty-five hours so taking it in the AM is not as effective as it may have first sounded as Clen peaks in the system many hours after taking it so taking it in the morning does not guarantee sleep.
This said, do know cortisol levels may rise if sleep deprivation occurs as this can increase blood pressure!
Faster Heart Rate
It is not a secret Clenbuterol stimulates the sympathetic nervous system as it is well known to do so; this is a risk worth noting as it can cause a resting heart to beat much faster than normal. In fact, one doctor named Thomas O’Connor shared anecdotal evidence that claimed Clenbuterol may cause a heart rate as fast as a hundred and eighty beats per minute!
In rare cases, some Clen users later endured chronic atrial fibrillation, which is when the heart irregularly beats due to chronic cardiac scarring. Given this, Clen is pretty risky to take, and most so for those with:
- Heart arrhythmia.
- High blood pressure.
- A family or history of cardiac issues.
Clenbuterol Dosage
How much Clen a person should take has all to do with their goal.
Health issues or conditions should also be taken into consideration.
For example – a person with asthma should stick to eighty mcg daily.
While those with more severe respiratory issues should take half that.
This said, healthy bodybuilders who compete for a living may take six/eight twenty-milligram pills daily.
This is a hundred and twenty to a hundred and sixty micrograms daily! Such an intake is not one for new or slightly experienced users as it is an excessive dose that can cause intense, longer-lasting side effects, and with diminished returns that make the side effects of such a big intake not worth it for most people.
However, let us not forget people respond to such potent compounds uniquely to one another. As such, the dose size and cycle length a person runs should be tailored to their personal health and fitness goals.
It is worth noting Clen can be taken by men and women in equal doses. This makes it unique to most anabolic steroids that are often taken by men or women in smaller or larger doses. The reason each sex can take the same amount is it does not affect hormones but rather the central nervous system instead. As such, women can take Clen in lower doses as they have less testosterone than men and may achieve similar results from even low doses.

Clenbuterol Cycle
Those who want to use Clenbuterol to maximize fat loss and muscle growth often run the below cycle:
- Days 1-3, twenty micrograms of Clenbuterol.
- Days 4-6, thirty micrograms of Clenbuterol.
- Days 7-9, forty micrograms of Clenbuterol.
- Days 10-12, fifty micrograms of Clenbuterol.
- Days 13-15, sixty micrograms of Clenbuterol.
- Days 16-18, seventy micrograms of Clenbuterol.
- Days 19-21, eighty micrograms of Clenbuterol.
- Days 22-24, ninety micrograms of Clenbuterol.
- Days 25-27, one hundred micrograms of Clenbuterol.
- Days 28-30, one hundred and ten micrograms of Clenbuterol.
Know that most people are quick to build a tolerance to this compound.
As such, the dose starts low and slowly rises to enhance positive effects.
This said, only if a person handles side effects well should they up the dose.
As said above, the intensity and duration of side effects from Clen can vary from one person to the next as while there are cases of people taking over a hundred milligrams daily with no side effects had, there are also many cases where a person taking fifty to eighty mgs daily had severe side effects; a good time and reason to end a cycle early.
Among other reasons – Clen is rarely cycled past six weeks as it can cause beta-receptor downregulation; a cellular process in which receptor cells along the surface of cells begin to diminish. For this reason, it is not at all rare for a person to cycle Clen for two days or weeks followed by a break of two days or weeks.
Clenbuterol Cycle – Two Weeks On and Two Weeks Off
As said above, short Clen cycles are ran to prevent the body from gaining a tolerance to the drug, and in doing so, the drug can more effectively burn fat in future cycles. Aside from this, one other benefit of a two-week Clenbuterol cycle is it poses less cardiovascular strain than one that lasts four or more weeks.
Many are able to cycle Clenbuterol with none to few and tolerable side effects endured. However, there have been cases where those who used it ended up in the hospital – as noted in one story of a man in his twenties who went to the ER after taking a twenty-microgram dose of the compound. It was then when doctors learned his heart was running at an astonishing rate of one hundred and forty beats per minute!
The male patient this story refers to endured a range of unpleasing side effects from this drug, including:
- Sweats.
- Anxiety.
- Nausea.
- Chest pain.
- Palpitations.
What makes his case unique to most is the fact he had been taking the same-sized dose for the three weeks leading up to his side effects and hospitalization. This means even if it is taken for a few weeks with no side effects endured, the chance of side effects emerging at some point in time still does exist.
Most who run a two-week Clen cycle start by taking twenty to forty micrograms daily. They then slowly raise it up, every one to two days, until a dose size of one to a hundred and forty micrograms is reached.
Once that dose size is reached and the cycle comes to an end, the person takes a two-week reprieve to give their body time to settle and recover. Then, when the next cycle begins two weeks later, they start by taking the largest dose had in the prior cycle so their body can continue to burn fat and build muscle.
Clenbuterol and Winstrol Cycle
- Days 1-3, twenty milligrams of Winstrol and twenty micrograms of Clenbuterol.
- Days 4-6, twenty milligrams of Winstrol and thirty micrograms of Clenbuterol.
- Days 7-9, twenty milligrams of Winstrol and forty micrograms of Clenbuterol.
- Days 10-12, twenty milligrams of Winstrol and fifty micrograms of Clenbuterol.
- Days 13-15, twenty milligrams of Winstrol and sixty micrograms of Clenbuterol.
- Days 16-18, twenty milligrams of Winstrol and seventy micrograms of Clenbuterol.
- Days 19-21, twenty milligrams of Winstrol and eighty micrograms of Clenbuterol.
- Days 22-24, twenty milligrams of Winstrol and ninety micrograms of Clenbuterol.
- Days 25-27, twenty milligrams of Winstrol and one hundred micrograms of Clenbuterol.
- Days 28-30, twenty milligrams of Winstrol and one hundred and ten micrograms of Clen.
- Days 31-37, twenty milligrams of Winstrol.
- Days 38-44, twenty milligrams of Winstrol.
- Days 45-51, twenty milligrams of Winstrol.
- Days 52-60, twenty milligrams of Winstrol.
This cycle includes Winstrol – an anabolic steroid most used in cutting cycles to enhance fat loss and lean muscle growth, as you likely guessed, this stack has more anabolic effects than a cycle consisting of Clen alone – so both fat loss – and muscle atrophy – will be accelerated and much more noticeable to the eyes.
Those who want to try this stack should know Winstrol causes strain and side effects unique to those of Winstrol, which is an oral steroid like Clen but one that causes more strain on the liver. This is shown in the LFTs of those who run this cycle as results show it not only raises AST enzymes but ALT enzymes too.
Atop of this, it raises LDL cholesterol levels so the risk of blood pressure spikes is high when this steroid is present in the body. There are other androgenic side effects of Clenbuterol to know of, these include:
- Acne vulgaris.
- Enlarged prostate.
- Hair loss/recession.
Like many steroids, Winstrol can halt or slow production of endogenous testosterone production. If or when this occurs, it may take weeks or months for the body, and its production of natural testosterone, to recover. As such, most undergo PCT as doing so can let the body recover in weeks instead of months.
Can Women Take Winstrol?
Rarely is Winstrol taken by women, it is most often cycled by men.
The reason being is the chance of virilization occurring is quite high.
However – many women follow the below cycle without any issues:
- Days 1-3, five milligrams of Winstrol and twenty micrograms of Clenbuterol.
- Days 4-6, five milligrams of Winstrol and thirty micrograms of Clenbuterol.
- Days 7-9, five milligrams of Winstrol and forty micrograms of Clenbuterol.
- Days 10-12, five milligrams of Winstrol and fifty micrograms of Clenbuterol.
- Days 13-15, five milligrams of Winstrol and sixty micrograms of Clenbuterol.
- Days 16-18, five milligrams of Winstrol and seventy micrograms of Clenbuterol.
- Days 19-21, five milligrams of Winstrol and eighty micrograms of Clenbuterol.
- Days 22-24, five milligrams of Winstrol and ninety micrograms of Clenbuterol.
- Days 25-27, five milligrams of Winstrol and one hundred micrograms of Clenbuterol.
- Days 28-30, five milligrams of Winstrol and one hundred and ten micrograms of Clen.
- Days 31-37, five milligrams of Winstrol.
- Days 38-44, five milligrams of Winstrol.
- Days 45-51, five milligrams of Winstrol.
- Days 52-60, five milligrams of Winstrol.
The above cycle is not one a female needs to adopt if their goal is to lose fat as dieting while taking Clen will likely get the job done, and while posing less strain on the body and liver in the process. This said, if a woman wishes to burn fat and build tons of muscle, then taking the two in tandem is a suitable choice.
Anavar and Clenbuterol Cycle for Men
- Days 1-3, twenty milligrams of Anavar and twenty micrograms of Clenbuterol.
- Days 4-6, twenty milligrams of Anavar and thirty micrograms of Clenbuterol.
- Days 7-9, twenty milligrams of Anavar and forty micrograms of Clenbuterol.
- Days 10-12, twenty milligrams of Anavar and fifty micrograms of Clenbuterol.
- Days 13-15, twenty milligrams of Anavar and sixty micrograms of Clenbuterol.
- Days 16-18, twenty milligrams of Anavar and seventy micrograms of Clenbuterol.
- Days 19-21, twenty milligrams of Anavar and eighty micrograms of Clenbuterol.
- Days 22-24, twenty milligrams of Anavar and ninety micrograms of Clenbuterol.
- Days 25-27, twenty milligrams of Anavar and one hundred micrograms of Clenbuterol.
- Days 28-30, twenty milligrams of Anavar and one hundred and ten micrograms of Clen.
- Days 31-37, twenty milligrams of Anavar.
- Days 38-44, twenty milligrams of Anavar.
- Days 45-51, twenty milligrams of Anavar.
- Days 52-60, twenty milligrams of Anavar.
Also known as Oxandrolone, Anavar is a popular cutting steroid among bodybuilders.
After all, it is potent, and not only enhances fat loss but muscle and strength growth too.
It is less powerful than Winstrol but with it having fewer and milder side effects, most find this to be a worthy tradeoff. Adding to this, Anavar is one of the few rare steroids to strike FDA approval, but only as a medicine and treatment for certain medical issues/conditions, and not for bodybuilding purposes.
Anavar and Clenbuterol Cycle for Women
- Days 1-3, five milligrams of Anavar and twenty micrograms of Clenbuterol.
- Days 4-6, five milligrams of Anavar and thirty micrograms of Clenbuterol.
- Days 7-9, ten milligrams of Anavar and forty micrograms of Clenbuterol.
- Days 10-12, ten milligrams of Anavar and fifty micrograms of Clenbuterol.
- Days 13-15, ten milligrams of Anavar and sixty micrograms of Clenbuterol.
- Days 16-18, ten milligrams of Anavar and seventy micrograms of Clenbuterol.
- Days 19-21, ten milligrams of Anavar and eighty micrograms of Clenbuterol.
- Days 22-24, ten milligrams of Anavar and ninety micrograms of Clenbuterol.
- Days 25-27, ten milligrams of Anavar and one hundred micrograms of Clenbuterol.
- Days 28-30, ten milligrams of Anavar and one hundred and ten micrograms of Clen.
Unlike Winstrol, Anavar is a safer, more suitable steroid for women.
This is due to Anavar being less likely to cause masculinizing effects.
The above cycle is best for women who want a lean, strong physique.
It is – however – not the best stack for women who want to slim in size.
As such, many celebs take Clen alone while bodybuilders often stack it.
Cytomel (T3) and Clenbuterol Cycle
Bodybuilders who want to burn as much fat as possible may stack Clenbuterol with Cytomel to do so.
Also known as Synthetic T3, this hormone medicine used to treat hypothyroidism is also sold under the names Triostat and Cytomel. It is used in bodybuilding as it accelerates the rate of lipolysis in the body, which makes it easier and speedier for the body to burn fat stores. Many bodybuilders dub it the best steroid stack for getting ripped. In fact, many professionals cycle it in the weeks leading up to an event.
However – with stunning results comes harsher side effects – which this stack is well known to produce!
In terms of dose size, most take twenty-five to seventy-five micrograms of Cytomel daily and for a length of six to eight weeks. However, intermediate bodybuilders usually take fifty micrograms daily as greater doses often give diminished returns with longer-lasting side effects. This said, some bodybuilders stack it with anabolic roids like Testosterone instead given the catabolic effects Cytomel has on muscle tissue.
Clenbuterol Results – Before and After
Clenbuterol, a strong decongestant and bronchodilator used by bodybuilders and fitness gurus around the world, has positive effects on fat loss and muscle growth. It was once only used to help animals with respiratory issues to breathe but is now a sought-after compound by those who want to greatly enhance their physique and muscle definition, though what exactly can a person expect after taking Clenbuterol?
Well, during the first week, Clen will raise the body temp due to its thermogenic effects. This, in turn, accelerates the metabolism and enables calories to be burned most efficiently. During this time, you will begin to see less fat and greater muscle definition, and likely much higher levels of energy as well.
During week two, the appetite may become suppressed with cravings for food slowly going away. And by the end of the cycle, these effects should amount to tons of burned fat and new lean muscle growth!
Clenbuterol before and after pictures
Here is a picture of a man in his 30’s before and after taking clenbuterol for 8 weeks. 4 weeks on and 4 weeks off.

Here is a picture of a woman in her 30’s before and after taking clenbuterol for 8 weeks. off. 2 weeks on and 2 weeks off. Clean diet, heavy lifting.

Frequently Asked Questions
Join us below as we answer the questions most commonly asked by those who are new to Clenbuterol.
Albuterol vs. Clenbuterol
Also known as Salbutamol, Albuterol Sulfate is like Clenbuterol in the sense it too is a beta-2 adrenergicagonist. However – there is one difference among them – and that is Albuterol is an FDA-approved drug, but not for bodybuilding, but rather as a treatment for asthma.
This said, many use it in bodybuilding despite it being a medicine for asthma as it can burn fat stores via a process known as thermogenesis, during which, the central nervous system is aroused and stimulated. As such – we can say effects and potential benefits of Albuterol are similar to ones had with Clenbuterol.
This said, Clen is most toxic and potent of the two, which is why most refer to Albuterol as a clean and safer-to-use stimulant. With it being less potent – Albuterol also causes fewer and milder side effects. Plus, it is less taxing on the cardiovascular system, making it ideal for those who are fine with achieving milder results than what Clenbuterol produces in exchange for a safer and less risky and harmful cycle.
Being milder, the fat burned and muscle built from Albuterol does not compare to gains had from Clen; a steroid that accelerates fat loss and muscle atrophy but at the expense of more intense and frequent side effects. This said, while Albuterol is widely deemed the safer of the two compounds, it does have a shorter, four-to-six-hour half-life so it requires more frequent doses, usually three to four doses per day.
On a final note, Albuterol and Clen come in oral form so they are easy for most to take but Albuterol is a medicine prescribed as an inhaler to those having breathing issues so it is not the easiest drug to obtain.
Is Clenbuterol Legal?
Clenbuterol is legal in the United States and most other places as it is not a drug listed in the Controlled Substances Act. However, those who want to use it should be cautious and know what they are getting into as it is not an FDA-approved compound. Athletes, especially, need to be careful as while it has not been banned by the government, it has been by the World Anti-Doping Agency. So if an athlete takes a drug test that finds even trace amounts of it in their system they will likely be suspended from the sport.
Is Clenbuterol Safe?
This steroid is not approved by the Food and Drug Administration, which is likely due to its high toxicity.
However, a study out of China by the Peking Union Medical College learned Clen has only mild effects on rabbits yet their heart rates did rise when larger doses were administered; an effect that caused them to endure hypotension. As such, most people say the safety of Clen has lots to do with the dose size taken. This is likely the case as – anecdotally – we see side effects of Clen to be greater the larger doses become.
Note: No matter the dose size taken, men or women who take Clen despite having a history of heart issues are at a high risk of complications – especially if they stack Clen with other anabolic steroids as doing so can worsen side effects and intensify cardiovascular strain – so lots of caution should be had!
Will Weight Lost From Clenbuterol Be Permanent?
As long as a person diets/trains properly, fat burned and muscle built on a cycle will sustain once it ends though a small amount of the water muscles lose during the cycle will return; the only temporary effect.
Does Clenbuterol Work?
Widely dubbed the most potent and effective fat burner in existence you can assume it works as it does! However, it can only be bought from the black market, where it is not rare for drugs to be faked/tainted. Given this, it can be hard to know if you are getting genuine and authentic Clenbuterol, but if you take it and experience no fat loss or increased body temp, you can be sure what you got was not the real thing.
This said, it is rarely faked likely due to its low price – but even so – it is good to err on the side of caution.
Can I Drink Alcohol with Clenbuterol?
In oral form, anabolic steroids are quite hepatotoxic, and the stress they cause on the liver means those taking such compounds should avoid alcohol as they can harm the liver even more. This said, Clen is not an anabolic steroid but rather a bronchodilator so it alone does not stress the vital organ – though it can elevate blood pressure and speed up the heart rate while causing dehydration too. Given these possible side effects – it is in the best interest of the health of the person cycling Clen to avoid alcohol altogether.