Makers of Viagra, Cialis show how rivals tend to raise prices in tandem, a reason for the surge in U.S. prescription-drug spending
Pfizer Inc. raised the list price of Viagra by 13% in June. Less than a week later, Eli Lilly & Co. pushed up the price of its competing pill Cialis by the same percentage.
.. A common six-pill prescription of Viagra or Cialis lists for around $300 today—more than double the price five years ago
.. “Not only have these pharmaceutical companies raised prices significantly—sometimes by double digits overnight—in many instances the prices have apparently increased in tandem,” the pair wrote. The FTC and Justice Department declined to comment.