WASHINGTON (AP) — The price is sky-high, but so is demand. A new $1,000-per-pill drug has become the treatment of choice for Americans with hepatitis C, a liver-wasting disease that affects more than 3 million.

Even with insurers reluctant to pay, Sovaldi prescriptions have eclipsed those for all other hepatitis C pills combined in a matter of months, new data from IMS Health indicate. The promise of a real cure, with fewer nasty side effects, has prompted thousands to get treated.