Costs chart for Metronidazole.
Keywords: Metronidazole Hydrochloride, Metronidazole, Flagyl, Flagyl ER, Flagyl I.V. Rtu IN Plastic Container, Metro I.V., Metro I.V. IN Plastic Container, Metrocream, Metrogel, Metrogel-vaginal, Metrolotion, Metromidol, Metronidazole IN Plastic Container, Noritate, Nuvessa, Protostat, Satric, Vandazole, Flagyl I.V., Nitroimidazole Antimicrobial.
Chart data: 

 '2008', 52.74, 14.51,
 '2009', 47.48, 12.54,
 '2010', 37.57, 10.05,
 '2011', 38.1, 13.58,
 '2012', 63.2, 15.28,
 '2013', 47.84, 17.84,
 '2014', 42.38, 9.89,
 '2015', 75.54, 7.42,
 '2016', 21.29, 6.75,
 '2017', 19.81, 6.23,
 '2018', 37.47, 9.78
Own work using: https://clincalc.com/DrugStats/Drugs/Metronidazole
ClinCalc DrugStats