A report shows Tennessee has lost the top national ranking of per capita prescription drug use to West Virginia. The report by Blue Cross Blue Shield of Tennessee shows West Virginia took the lead, with 17.4 prescriptions per capita in 2006, compared to 16.9 prescriptions per person in Tennessee. Tennessee’s rates dropped 6.6 percent from 18.1 prescriptions in 2004. Experts attribute the drop to efforts to curb the rate of drug use, particularly among the TennCare population. In 2005, TennCare began limiting prescriptions for most adults to five per month, with exceptions for some medications. Officials said the painkiller hydrocodone is the No. 1 drug by volume that TennCare funds.