Do darts players take beta blockers?

WADA explicitly prohibits beta blockers in sports that are reliant on stability of the extremities, such as archery, racing, billiards, darts, golf, shooting and fishing.

acc.org - Cardiovascular Medications on the World Anti-Doping Agency List

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CASE SCENARIOS

You review your clinic schedule for the day and notice that many of your athletes may require cardiovascular medications: 50-year-old male semi-pro triathlete with hypertension managed on hydrochlorothiazide coming to see you for a second opinion

18-year-old female soccer goalie with intermittent supraventricular tachycardia (SVT) considering medication options

42-year-old male professional golfer with progressive stable angina

24-year-old male professional American-style football lineman with refractory hypertension

As a sports cardiologist, it is imperative to be aware of appropriate treatment strategies that will not jeopardize an athlete's eligibility for competition. Specifically, knowledge of the World Anti-Doping Agency (WADA) medication list is paramount to the decision-making process, as well as ensuring that athletes are not taking performance-enhancing substances. Prior to 1998, there were no reliable anti-doping laboratory tests for erythropoietin (EPO), though at that time it was known to be a doping agent. A few days prior to the 1998 Tour De France, a crew member of a cycling team was arrested when customs officers found steroids and other doping paraphernalia in his car. This arrest unraveled a scandal that led to police raids, arrests, and protests. Most importantly, it led to the discovery of widespread illegal doping during the 1998 Tour De France.1 In response, the International Olympic Committee founded the World Anti-Doping Agency (WADA) in 1999 with the mission to govern performance enhancing medical procedures and drugs to maintain fairness for professional athletes. Each year WADA publishes an international "Prohibited List" which goes into effect on January first of that year.2 In the United States (US), the US Anti-Doping Agency (USADA) has similar policies to protect the integrity of sport in the US with near universal agreement between the two lists. It is well known that hormones and anabolic steroids are prohibited in sports; however, many common cardiovascular medications are also on the WADA list. This document will focus on some of these cardiovascular medications, which happen to be frequently prescribed and are considered first line treatments in many conditions. Each league, such as the National Football League or National Basketball Association, sets its own rules and policies on enforcement and testing. The goal of WADA and USADA is to establish a standard that would apply to any team playing outside its league, such as teams playing internationally. Knowledge of the specific league rules is helpful, but more importantly, understanding which drugs are on the list and when the medications are restricted is essential when caring for athletes. The complete list can be found online.

CARDIOVASCULAR MEDICATIONS ON THE PROHIBITED LIST

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Diuretics

Diuretics are prohibited in all sports, both during training and during competition. Sports in which competition is based on weight categories restrict use of diuretics because of their ability to artificially and temporarily lower plasma volumes; thus, placing an athlete in a different weight category could provide a competitive advantage. Diuretics are also universally banned because they can be used to rapidly reduce detection of some doping agents (e.g., anabolic steroids) prior to anti-doping testing. All diuretics including loop diuretics (furosemide, torsemide and bumetanide), thiazide diuretics, spironolactone, and vaptans are prohibited (Figure 1).3

Figure 1

× Figure 1 Figure 1: Courtesy of Chhana R, Dineen EH, Husaini M.

Figure 1: Courtesy of Chhana R, Dineen EH, Husaini M.

Beta Blockers

Beta blockers reduce sympathetic effects, such as increases in heart rate and blood pressure, which often are heightened during athletic competition. WADA explicitly prohibits beta blockers in sports that are reliant on stability of the extremities, such as archery, racing, billiards, darts, golf, shooting and fishing.4 All beta-blockers, such as carvedilol, metoprolol, atenolol, and propranolol, are included on the list. Beta blockers are allowed in other sports, but not in competition, as described below.

Other Medications

Anabolic steroids, growth factors (e.g., insulin-like growth factor-1, platelet-derived growth factor), certain beta-2 agonists and other hormones (e.g., aromatase inhibitors, anti-estrogens) are always prohibited. Stimulants, opioids, cannabinoids, and glucocorticoids (including prednisone) are prohibited in competition. Clonidine, while listed as a stimulant but often used for hypertension, is an exception and not prohibited.

OTHER CONSIDERATIONS REGARDING THE PROHIBITED LIST

Timing Definitions

WADA also classifies these banned substances based on when they may be taken. The listed drug classes may have a period of acceptable use. They define "in-competition" prohibition as drugs banned in the period commencing just before midnight (at 11:59 p.m.) on the day before a competition until the end of the competition and the sample collection process. WADA defines substances prohibited "at all times" as substances that are prohibited both in-competition and out-of-competition. Beta blockers are prohibited in-competition while diuretics are always prohibited.

Sport Type

Certain drugs are only prohibited with certain sports. Beta blockers, for example, are prohibited in sports that require stability of extremities, but they can be used in other sports. If applicable, the sports in which certain drugs are prohibited are listed under each drug category.

MEDICAL TREATMENT WITHOUT COMPROMISING ELIGIBILITY

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Going back to the case vignettes, with your knowledge of the WADA list and cardiovascular medications, your clinic today goes extraordinarily well. The 50-year-old triathlete is transitioned from hydrochlorothiazide to amlodipine and is appreciative that their dehydration during races should also improve. The 19-year-old soccer goalie would like to avoid invasive procedures and chooses a trial of low dose long-acting diltiazem. The 42-year-old golfer was not aware that his metoprolol was jeopardizing his eligibility and is transitioned to a long-acting nitrate for his stable angina. Finally, the 24-year-old football lineman is started on an angiotensin receptor blocker and scheduled for a sleep study.

SUMMARY

Professional athletes with cardiovascular conditions may require pharmacological treatment. Under the jurisdiction of professional athlete governing bodies, WADA and USADA, some common cardiac medications are prohibited. Familiarizing oneself with these prohibited medications is important for any medical professional caring for the competitive athlete.

References

Whittle J. The 1998 Tour de France: Police raids, arrests, protests... and a bike race (Cyclingnews.com). 2017. Available at: https://www.cyclingnews.com/features/the-1998-tour-de-france-police-raids-arrests-protests-and-a-bike-race/. Accessed 09/01/2021. World Anti-Doping Agency (WADA) Prohibited List (USADA.org). 2021. Available at: www.usada.org/athletes/substances/prohibited-list/. Accessed 09/01/2021. Cadwallader AB, de la Torre X, Tieri A, Botrè F. The abuse of diuretics as performance-enhancing drugs and masking agents in sport doping: pharmacology, toxicology and analysis. Br J Pharmacol 2010;161:1-16. Heuberger JAAC, Cohen AF. Review of WADA prohibited substances: limited evidence for performance-enhancing effects. Sports Med 2019;49:525-39. Clinical Topics: Arrhythmias and Clinical EP, Cardiovascular Care Team, Prevention, Sports and Exercise Cardiology, Stable Ischemic Heart Disease, Atrial Fibrillation/Supraventricular Arrhythmias, Statins, Hypertension, Chronic Angina Keywords: Sports, Athletes, Performance-Enhancing Substances, Glucocorticoids, Prednisone, Torsemide, Propranolol, Atenolol, Furosemide, Sodium Chloride Symporter Inhibitors, Bumetanide, Metoprolol, Sodium Potassium Chloride Symporter Inhibitors, Carvedilol, Spironolactone, Diltiazem, Clonidine, Aromatase Inhibitors, Nitrates, Analgesics, Opioid, Doping in Sports, Diuretics, Hydrochlorothiazide, Blood Pressure, Amlodipine, Heart Rate, Receptors, Angiotensin, Angina, Stable, Plasma Volume, Cannabinoids, Insulin-Like Growth Factor I, Dehydration, Laboratories, Hypertension, Testosterone Congeners, Tachycardia, Supraventricular, Erythropoietin, Extremities, Referral and Consultation, Receptors, Platelet-Derived Growth Factor, Angiotensin Receptor Antagonists, Decision Making, Reference Standards, Pharmaceutical Preparations

acc.org - Cardiovascular Medications on the World Anti-Doping Agency List

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