Unfortunately, this will also increase the thickness of the blood, making it flow more slowly. It may also increase the risk of blood clot formation. It is abused with the same goal as blood doping. The adverse effects to competition are also similar to blood doping. Other drugs previously discussed are often abused by athletes as well.
Some cultures abuse camel dung as a form a hashish.
Marijuana is fed to the camels. During its passage through the camel digestive tract, the marijuana is concentrated and compacted to form a concentrated marijuana, similar in potency to hashish. The dung is generally smoked. Their abuse is often limited to members of the military. Tremors and seizures are the general adverse reactions.