This is a sub-list from List of doping cases in sport representing a full list of surnames starting with N.
| Name | Country | Event | Banned substance(s) | Reference(s) |
|---|---|---|---|---|
| Caba Nadj |
 Serbia
|
Weightlifting | Methandienone | |
| Ammar Naji |
 Yemen
|
Weightlifting | Metandienone, Stanozolol, Hydroxystanozolol | |
| Kazuhiro Nakamura |
 Japan
|
Mixed martial arts | Cannabis | |
| Bayarmaa Namkhaidorj |
 Mongolia
|
Weightlifting | Methylhexaneamine | |
| Sireli Naqelevuki |
 Fiji
|
Rugby union | Cannabis | |
| Dion Nash |
 New Zealand
|
Cricket | Cannabis | |
| Ramin Nasri |
 Iran
|
Swimming | Betamethasone | |
| Samir Nasri |
 France
|
Football (soccer) | Excessive intravenous therapy | |
| Paweł Nastula |
 Poland
|
Mixed martial arts | Nandrolone | |
| Andris Naudužs |
 Latvia
|
Cycling | Anabolic steroid | (in Latvian) |
| Rostyslav Naumchyk |
 Ukraine
|
Water polo | Cannabis | |
| Ryan Napoleon |
 Australia
|
Swimming | Formoterol | |
| Peter Nemeth |
 Hungary
|
Weightlifting | Metandienone | |
| Pavel Nesterenko |
 Russia
|
Powerlifting | ||
| Marek Nesvacil |
 Czech Republic
|
Volleyball | Cannabinoids | |
| Moisés Dueñas Nevado |
 Spain
|
Cycling | Erythropoietin (EPO) | |
| Hernâni Neves |
 Portugal
|
Football (soccer) | Cocaine | |
| Vania Neves |
Portugal
|
Swimming | Prednisone | |
| Ryan Newport |
 United States
|
Tennis | ||
| Shaun Newton |
 England
|
Football (soccer) | Cocaine | |
| Terry Newton |
 United Kingdom
|
Rugby | HGH | |
| Lars Brian Nielsen |
 Denmark
|
Cycling | Caffeine | |
| Mark Nielsen |
New Zealand
|
Tennis | Finasteride | |
| Ivan Nieto Agundiz |
 Mexico
|
Weightlifting | Nandrolone | |
| Josefi Nikola |
Czech Republic
|
Weightlifting | ||
| Pornilai Nilpetch |
 Thailand
|
Weightlifting | Methandienone | |
| Patrik Nilson |
 Sweden
|
Ice hockey | Nandrolon | |
| Ulf Nilsson |
Sweden
|
Ice hockey | Ephedrine | |
| J. Nithiyanandan |
 India
|
Swimming | Stanozolol | |
| Carola Nitschke |
 East Germany
|
Swimming | Anabolic steroids (self-admitted) | |
| Sangov Nizom |
 Tajikistan
|
Weightlifting | Methylhexaneamine | |
| Alexandre Nogueira |
 Brazil
|
Mixed martial arts | Boldenone | |
| Abdul Noori |
 Afghanistan
|
Weightlifting | T/E 14,6, Clostebol, Methylhexamine | |
| Franny Norton |
England
|
Horse racing | Metabolite of cocaine | |
| Anosheravan Nourian |
Iran
|
Boxing | Ephedrine | |
| Karel Nováček |
Czech Republic
|
Tennis | Cocaine | |
| Jan Novak |
Czech Republic
|
Water polo | Cannabis | |
| Nikita Novikov |
Russia
|
Cycling | Selective Androgen Receptor Modulators | |
| Joseph N'Sima |
France
|
Basketball | Ephedrine | |
| Kanayut Nuchcharpenpol |
Thailand
|
Weightlifting | Methandienone | |
| Daniel Núñez |
 Cuba
|
Weightlifting | Anabolic steroids | |
| Vanessa Nunez |
 Venezuela
|
Weightlifting | Metandienone | |
| Taylan Nurcan |
 Turkey
|
Weightlifting | Methandienone | |
| Nzubechi Grace Nwokocha |
 Nigeria
|
Track and Field | Ostarine and Ligandrol | |
| Ebba Nyberg |
Sweden
|
Swimming | 1,4,6-trien-3, 17dion | |
| Johan Nystrom |
 Finland
|
Weightlifting | Metandienone |