Dr Imran Sharief, a pulmonologist from California, gave tocilizumab, a drug used to treat rheumatoid arthritis, to severely ill COVID-19 patients A California physician says a rheumatoid arthritis drug could be an effective treatment for coronavirus. Dr Imran Sharief, a pulmonologist based in Santa Ana, told Fox News that he treated COVID-19 patients on ventilators with tocilizumab, sold under the …