title: Starting ritonavir.
mesh_terms: D004032:Diet; D017320:HIV Protease Inhibitors / Q000009:adverse effects*; D006801:Humans; D009325:Nausea / Q000139:chemically induced* / Q000517:prevention & control; D019438:Ritonavir; D013844:Thiazoles / Q000009:adverse effects*; D014633:Valine / Q000009:adverse effects*
chemical_list: D017320:HIV Protease Inhibitors; D013844:Thiazoles; D014633:Valine; D019438:Ritonavir