Merck's ($MRK) Liptruzet has only been on the market since last May, when the FDA approved the combo of generic Lipitor with Merck's Zetia for treating high cholesterol. But it will soon be unavailable. Why? The drugmaker is asking wholesalers to return all lots they have because a potential packaging leak could affect its potency. On Tuesday, the company said the voluntary recall "will deplete all available supply in the U.S., and stock-outs are expected." This recall comes only weeks after the drugmaker recalled one lot of its Gardasil HPV vaccine because of a chance that a small number of vials had glass particles in them. The drugmaker said any prescriptions patients have on hand are safe to use. It also said that both active ingredients in the combo pill are available in separate pill forms. Story | More