Tren Cough: Side Effects, Cure, and How to Avoid

what is tren cough

Trenbolone (or tren) is a popular anabolic steroid among bodybuilders; with it being used in bulking and cutting cycles.

Due to tren’s ability to build significant amounts of muscle (whilst simultaneously burning fat), it’s a much-coveted anabolic amongst illegal users.

Tren is also one of the most dangerous steroids out there.

It is the worst injectable steroid for side effects causing: high blood pressure, liver damage, balding, acne, anxiety, insomnia, and more.

However, a more mild, yet well-known side effect of taking trenbolone is tren cough.

In this article, we will share what the scientists know about the nature of this side effect.

We strongly advise against using anabolic steroids due to them being illegal and the potential for serious harm to your health.

Warning: The content on and the information included in this article is intended for entertainment and informational purposes only. It is not intended nor implied to be a substitute for professional medical advice. Prior to buying anything, check that it is compliant where you live with your current government laws. We frequently mention research chemicals that are not made for human consumption. Therefore, before purchasing any product for personal use, consult with your doctor or healthcare provider first.

What is Tren Cough?

Trenbolone typically requires an intramuscular injection. Consequently, this can cause violent fits of coughing, typically lasting a few seconds. This dry tren cough will diminish after a few seconds (or minutes) following the injection.

Users may also experience a metallic taste in the mouth or/and tightness in the chest.

This is a very short-lived side effect and isn’t dangerous. Some bodybuilders have reported this effect happening during roughly 15-20% of injections.

Scientists are not sure exactly what causes tren cough, but there are a few theories as to why it occurs.

It is thought that due to the high androgenic activity of this steroid (higher than the rest) it activates some of the inflammatory lipids called prostaglandins. They lead to inflammation and vasoconstriction.

Vasoconstriction of the muscular wall of the bronchus in the lungs is what triggers this cough reaction.

Coughing upon injection can happen with other steroids too, with two popular ones being deca Durabolin and testosterone enanthate. However, trenbolone is more notorious for this side effect.

Although tren cough is fairly common, not everyone is affected by it; with some users being completely unaware of what this sensation feels like.

How to Avoid Tren Cough?



Trenorol is supposed to be a legal alternative to perhaps the most popular steroid in the world – Trenbolone. It has to be said that this will not come close to the results of Trenbolone, however, it won’t have any of the side effects.

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Some illegal users switch to a longer ester of trenbolone (enanthate or hexahydrobenzylcarbonate), slowing down the rate at which the body absorbs the compound.

Also with using a longer ester, the frequency of injections needed is less. Less injections = less coughing.

Furthermore, some users dilute the tren, by combining other anabolic steroid oils in the syringe (such as testosterone), when injecting.

The more concentration of trenbolone per ml, the more likely steroid users are to experience tren cough. Thus opting for a lower concentrated serum, such as 50ml instead of 75ml.

The location of the injection may also play a role in the likelihood of you developing tren cough. When illegal users inject in the chest or quads, they may have less chance of this side effect occurring, compared to injecting in the back or glutes. This is because the chest and quads contain fewer blood vessels, reducing the speed of release into the body.

Is Tren cough dangerous?

The cough itself is not dangerous and is a mild side effect. It passes within seconds/minutes with no long lasting effect. However, people can get very anxious and paranoid about it, even dialing 999. Just wait for it to pass and relax.

Note: Trenbolone can cause other side effects, such as increased blood pressure, which is potentially dangerous. 

Does icing the injection site prevent tren cough?

There’s no tren cough cure as such. However, there are protocols you can take (like mentioned in this article), to reduce the chances of it happening. This particular icing strategy is used by some bodybuilders to shrink the capillaries, thus decreasing the chances of you hitting one. Tren users have reported some success with this method.

Why do I experience nausea on trenbolone?

Some people can experience nausea, because when you’re coughing out the metabolites of trenbolone from your lungs, it can be inhaled back in your body via the nasal cavity. If this experience causes a strong reaction where you are physically being sick or your appetite decreases (negatively affecting the gains during your cycle), you should think about coming off tren; or at least putting some measures in place to prevent tren cough.

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Tren cough is not dangerous, and it doesn’t happen to everyone who uses this steroid (especially enanthate and hexahydrobenzylcarbonate versions). Even those who do experience tren cough, don’t experience it in the majority of their injections.

There are certainly more serious side effects to watch out for when taking trenbolone; such as controlling your blood pressure, making sure your liver isn’t too strained and making sure your test levels recover as fast as possible post-cycle.

However, if tren cough is irritating you, as well as your lungs, try the following tips in this article and see if it improves. If it doesn’t get better, and it’s really affecting your well-being (this is unlikely), simply come off tren and opt for a different injectable steroid. Or simply switch to orals.

Trenbolone is mainly an injectable steroid, however Metribolone/Methyltrienolone is the oral version of tren. Metrobolone won’t result in tren cough, because you’re not injecting any oil, thus it can’t hit a blood vessel.

However, metribolone is also very hepatotoxic, thus users can experience excessive strain to the liver, compared to when using injectables. In which case, users should keep their cycles very short and avoid any alcohol during their cycle.

How to Avoid Tren Cough

A better and completely safe option is to take Trenorol, the legal steroid alternative for trenbolone. It’s designed to emulate the same muscle-building and fat-burning effects as tren, but without the negative effects (aka no more tren cough).

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Trenorol is 100% legal and FDA approved. It’s manufactured by Crazy Bulk, the number 1 legal steroid manufacturer online.

With trenorol, there’s no need to mess around with needles; plus you won’t experience the nasty physiological and psychological effects commonly associated with tren.

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Ernst Peibst

Ernst Peibst | Writer

Ernst Peibst is an expert in anabolic steroids and PEDs with over 3,000 hours of research. He's been educating people for 7 years through his articles, written after studying science papers, expert books and consulting top doctors in the field. He is a former bodybuilder and creator of multiple fitness websites.

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