A new Kaiser study finds nearly three quarters of the 50 most costly Medicaid drugs fall into five drug groups, the most prevalent of which is antivirals, which includes drugs used to treat HIV as well as hepatitis C. Medicaid Health Plans of America said the findings underscore a need to change the pharmaceutical industry's current pricing model, which the group says makes it difficult to provide high-cost drugs to all beneficiaries who need them. State Medicaid directors recently urged...