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Substances such as ephedrine and clenbuterol are now very popular when it comes to burning as much body fat as possible. On the one hand, this is only possible within the framework of a diet and with an intensive training plan; on the other hand, the use of these so-called beta2 receptor stimulators is accompanied by a rapid expression of a tolerance of these substances. Ketotifen is also a substance that not only stimulates the beta2 receptors but also increases the number of these receptors and counteracts tolerance. Ketotifen can also significantly enhance the effect of other stimulants. All you should know about this topic is here:


As already mentioned, the active substance ketotifen belongs to the group of antihistamines or beta2 receptors stimulants. In medicine, this substance is used to fight asthma and allergies. In addition, ketotifen is said to have a positive effect against toxins in the body and an extremely positive influence on the skin.


For bodybuilders, ketotifen is interesting as it increases the number of beta receptors or beta2 receptors. These receptors limit in particular the maximum intake period of clenbuterol and ephedrine, since these receptors are becoming ever further reduced with increasing duration of use.

An increase in the above-mentioned receptors thus means that the intake of the substances ephedrine and clenbuterol can be effected effectively much longer. Moreover, it has been found that the combination of, for example, clenbuterol and ketotifen makes it possible to reduce the dosage of clenbuterol to a significantly lower level with the same effect. This means in parallel that a normal dose of ephedrine or clenbuterol by the combination with ketotifen provides much more drastic results.

Ketotifen thus acts both in combination with ephedrine and with clenbuterol. Ephedrine also binds to specific beta receptors, which are then released and extended by ketotifen. This results in a week-long intake period without loss of efficiency.


For the stated purposes, i.e. the increase in the number of beta receptors and the enhancement of other stimulants such as ephedrine and clenbuterol, 3-4mg ketotifen are usually taken daily. On the one hand, ketotifen releases the receptors at this dosage and on the other hand it increases the number of receptors as mentioned, which means that a habituation effect on ephedrine and clenbuterol is virtually excluded. This means that 30-40 percent less ephedrine or clenbuterol can be dosed without experiencing a loss of efficiency.

Especially the ECA stack can achieve a quadruple effect in combination with ketotifen without causing more side effects.


The feared side effects of ketotifen are fortunately relatively small. In higher doses, ketotifen can cause inner restlessness, a dry mouth, increased appetite and thereby also a weight gain. At doses of 3-4 mg, however, no significant side effects were observed.

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