Guide to WADA Prohibited List

Diuretics & Masking Agents

Diuretics and masking agents are not performance enhancing but they are chemicals that aid in helping evade doping tests by hiding or preventing the detection of banned substances such as steroids.


Diuretics are the simplest form of masking agent. These are substances that help with passing fluid rapidly, diluting the urine and evading detection. They are normally used in treatment for hypertension and oedema.

Diuretics are often used in weight classification sports when it is vital to drop weight quickly. The side effects of diuretics include heart arrhythmia, kidney problems, tiredness, dehydration, frequent urination and muscle cramps. Examples of diuretics include Diucardin (hydroflumethiazide), Hydromox (quinethazone), Naturetin (bendroflumethiazide), Aldactone (spironolactone), Dyrenium (triamterene), and Midamor (amiloride).

Probenecid & Plasma Expanders

Probenecid and plasma expanders are normally used to treat gout or kidney stones and excessive blood loss respectively. Probenecid evades the presence of banned substances such as HGH whereas plasma expanders covers blood doping and EPO treatment. Both of these are banned at all times. The side effects of these substances includes gout, kidney stones, headache, heart attack, liver damage and anemia.

Diuretics & masking agents can take different forms and it is highly advisable that if you are unsure about an ingredient within supplements that you check our site to see if the product or ingredient is on there if not you can always email us at [email protected]