A look at top-selling prescription drugs in the US in 2014

Some figures on prescription medicine spending trends:

U.S. PRESCRIPTION SPENDING, 2014: $373.9 billion

U.S. PRESCRIPTION SPENDING, 2013: $330.5 billion

U.S. PRESCRIPTIONS DISPENSED, 2014: 4.33 billion

U.S. PRESCRIPTIONS DISPENSED, 2013: 4.24 billion

TOP DRUG TYPES BY PRESCRIPTION, 2014: Blood pressure, mental health, pain, antibacterials, cholesterol/blood fats, diabetes.

TOP DRUG TYPES BY SALES LEVEL, 2014: Cancer, diabetes, mental health, immune disorders, respiratory conditions, pain.

TOP DRUGS BY SALES, 2014: Sovaldi (hepatitis C), $7.9 billion; Abilify (schizophrenia), $7.8 billion; Humira (immune disorders), $7.2 billion; Nexium (severe heartburn), $5.9 billion; Crestor (cholesterol), $5.8 billion; Enbrel (immune disorders), $5.5 billion.

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Source: IMS Institute for Healthcare Informatics