what is tren cough

Tren Cough: What Is It & How to Prevent It?

Updated August 12, 2020
what is tren cough

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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.

Tren is also one of the worst steroids 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.

What is Tren Cough?

Trenbolone typically requires an intramuscular injection. During administration, it’s common for the oil to hit a blood vessel. Consequently this can cause violent fits of coughing, typically lasting a few seconds. Essentially this is your lungs trying to exhale harmful tren metabolites, whilst your left gasping for oxygen.

This dry tren cough will diminish after few seconds (or minutes) following the injection.

You may also experience a metallic taste in your mouth or/and tightness in your chest.

This is a very short-lived side effect and isn’t dangerous. 

Some bodybuilder have reported this affect happening during roughly 15-20% of injections (1).

No one knows exactly what causes tren cough, but there are a few theories as to why it occurs.

Trenbolone is an irritant, similar to capsaicin pepper. Just like when you eat capsaicin, it burns/irritates your tongue. The same principle applies with tren; when it hits the blood stream it can irritate your lungs – resulting in this 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?

  1. Use long esters
  2. Combine oils
  3. Lower the concentration
  4. Injection site
  5. Use orals

You can use 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 are less. Less injections = less coughing.

Furthermore you can 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 you are to experience tren cough. Thus opting for a lower concentrated serum, such as 50ml instead of 75ml is likely to help.

The location of the injection may also play a role in the likelihood of you developing tren cough. If you inject in the chest or quads, you 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 less blood vessels, reducing the chance of hitting one of them.

If tren cough is disturbing you that much, you can always use orals instead of injections. Although tren is mainly an injectable AAS, there are other oral compounds which are powerful in nature, such as dianabol and anadrol which will give you exceptional muscle gains. However, on the flip side, orals are typically more straining on the liver.


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.


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.


trenbolone alternative

A better and much safer 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).

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.


(1) https://www.youtube.com/watch?v=s_VycOpV8DQ

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