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| Subject | English | Russian |
| med. | first line drug | препарат первой линии (MichaelBurov) |
| med. | first line drug | лекарство первой линии (Anna Chalisova) |
| pharm. | first-line antiepileptic drug | противоэпилептический препарат первой линии (Andy) |
| med. | first-line drug | препарат первой линии (MichaelBurov) |
| med. | first-line drug | препарат первого выбора (iwona) |
| gen. | first-line drug | препарат первого ряда (Streptomycin is no longer considered as a first line drug by ATS/IDSA/CDC because of high rates of resistance. WK Alexander Demidov) |