An anti-doping test is a procedure used to detect banned substances or methods in an athlete’s body. It typically involves collecting urine or blood samples, which are then analyzed at specialized laboratories to determine whether an athlete has used performance-enhancing drugs or other prohibited substances. The system exists to protect fair competition and athlete health, and it operates under a global framework coordinated by the World Anti-Doping Agency (WADA), established in 1999.
What the Test Is Looking For
WADA maintains a Prohibited List that is updated every year and covers a wide range of substances and methods. The main categories include anabolic agents (like synthetic testosterone), stimulants, hormone and metabolic modulators, diuretics and masking agents, and beta-2 agonists (drugs that open airways but can also boost performance). Some substances are banned at all times, while others, like certain stimulants, are only prohibited during competition periods.
The list also covers prohibited methods, not just substances. Blood transfusions, gene doping, and certain types of IV infusions all qualify. For 2025, WADA added further examples across several categories to help athletes identify banned substances more easily, reclassified hydrafinil as a non-specified stimulant, and clarified that blood donation at an accredited collection center is no longer prohibited.
How Urine Samples Are Collected
The process starts when a Doping Control Officer (DCO) or a chaperone notifies an athlete in person that they’ve been selected for testing. From that moment, the athlete must stay within direct sight of the DCO or chaperone at all times. The athlete is informed of their rights and asked to sign an acknowledgment.
When ready, the athlete selects a sealed collection vessel from a set of options, inspects it, and rinses their hands with water before opening it. They then provide at least 90 milliliters of urine under direct observation by a same-gender DCO or chaperone. To ensure a clear view, the athlete is asked to raise their shirt to mid-torso and lower their pants to mid-thigh. If the athlete can’t produce enough volume in one attempt, the partial sample is stored in a secure vault until they can provide the rest.
Once the sample is complete, the athlete immediately seals it. The DCO checks that the sample meets a minimum concentration threshold (called specific gravity) to ensure it’s suitable for analysis. The sample is then split into two portions, labeled A and B, and sealed into tamper-proof containers. The DCO completes chain-of-custody paperwork, and the sealed transport bag is prepared, ideally with a witness present.
Blood Testing and the Biological Passport
Blood samples follow a similar chain-of-custody protocol. Two samples are collected (A and B), with volumes typically around 3 milliliters each for whole blood or 5 milliliters each for serum. Blood must be transported in a refrigerated state, kept between 2 and 12 degrees Celsius, and never allowed to freeze. A temperature data logger often travels with the samples to verify conditions were maintained.
Beyond a single snapshot, anti-doping authorities use a tool called the Athlete Biological Passport (ABP). Rather than looking for a specific drug, the ABP tracks an individual athlete’s blood and steroid markers over time. It has two modules: a hematological module (tracking blood values that shift with blood doping or EPO use) and a steroidal module (tracking natural hormone levels and ratios in urine). Each time an athlete is tested, software recalculates their expected range based on all their previous results. If a new value falls outside that personalized window, it raises a red flag, even without identifying a specific substance. This approach catches athletes who use methods designed to avoid direct detection.
What Happens in the Lab
Samples are sent to WADA-accredited laboratories for analysis. The A sample is tested first. If it returns a positive result, the athlete is notified and has the right to request that the B sample be opened and tested, typically at the same lab or a different accredited facility. The B sample serves as a safeguard: if it confirms the A sample finding, the case moves forward. If the B sample doesn’t confirm it, the result may be declared negative.
For Athlete Biological Passport tests, no B sample is required because the ABP relies on patterns across multiple tests rather than a single detection event. However, if ABP data reveals suspicious markers, authorities can order a targeted follow-up test, and having a complementary sample available for confirmation is recommended.
In-Competition vs. Out-of-Competition Testing
Athletes can be tested at two distinct times. In-competition testing happens at or around an event, usually right after a race or match. Out-of-competition testing can happen anywhere, at any time, with no advance notice. This distinction matters because some substances are only banned during competition (certain stimulants and narcotics, for example), while others like anabolic steroids and hormones are banned year-round.
Out-of-competition testing is especially important for catching athletes who use substances during training and stop before competition day, hoping the drug will clear their system in time. To make this possible, elite athletes in a Registered Testing Pool (RTP) must submit detailed location information every quarter, including their home address, training schedule, competition calendar, and overnight accommodations. Most critically, they must provide a 60-minute window each day when they will be at a specific location, available and accessible for testing. If a tester arrives during that window and the athlete isn’t there, it counts as a missed test. Athletes submit and update this information through WADA’s Anti-Doping Administration and Management System (ADAMS) or a mobile app called Athlete Central.
Therapeutic Use Exemptions
Some athletes have legitimate medical conditions that require treatment with a banned substance. Asthma medication, insulin for diabetes, or testosterone replacement for a diagnosed deficiency can all involve prohibited drugs. In these cases, an athlete can apply for a Therapeutic Use Exemption (TUE), submitted at least 21 days before competing.
A TUE is granted only when four conditions are met: withholding the substance would significantly harm the athlete’s health, the treatment would not enhance performance beyond restoring normal health, no reasonable alternative treatment exists, and the need for the substance did not arise from prior non-medical use of a banned drug. Using a prohibited substance to raise “low-normal” hormone levels is specifically not considered acceptable. The system is designed to be narrow, ensuring medical needs are met without opening a loophole.
Penalties for Violations
Sanctions under the World Anti-Doping Code range from a public reprimand to a lifetime ban, depending on the violation and circumstances. Trafficking or administering banned substances carries a minimum of four years of ineligibility, potentially extending to a lifetime ban. Complicity, covering up a violation, or retaliating against whistleblowers carries a minimum of two years.
For athletes who test positive, the severity depends on the substance, whether the violation was intentional, the athlete’s degree of fault, and whether it’s a first offense. Aggravating factors (like using multiple substances or involvement in a doping scheme) can increase the ban. Conversely, athletes who can demonstrate the violation was unintentional or resulted from a contaminated product may receive a reduced sanction. Multiple violations lead to progressively longer bans, with a second offense potentially resulting in a lifetime suspension.