By Pat Anson, PNN Editor

Spot shortages of Excedrin are being reported after a pharmaceutical company halted production of two leading brands of the pain reliever due to “inconsistencies” in their ingredients.

GlaxoSmithKline (GSK) says consumers are not at risk, but as a precaution it has indefinitely suspended all production and distribution of Excedrin Extra Strength and Excedrin Migraine.

“Through routine quality control and assurance measures, we discovered inconsistencies in how we transfer and weigh ingredients for Excedrin Extra Strength Caplets and Geltabs and Excedrin Migraine Caplets and Geltabs,” GlaxoSmithKline said in a statement.

“Based on the available data, GSK believes that the product does not pose a safety risk to consumers. However, as a precautionary measure, GSK Consumer Healthcare has voluntarily implemented a discontinuation of production and distribution.”

Some drug stores in upstate New York have already run out of Excedrin Extra Strength and Excedrin Migraine. GSK said other Excedrin products are still available and urged consumers to ask their pharmacist for advice on alternative pain relievers.

“We are working hard to resolve the issue as quickly as possible, but at this point in time cannot confirm a definite date as to when supply will resume,” the company said.

In 2012, an Excedrin manufacturing plant in Lincoln, Nebraska was shut down for several months after Excedrin bottles were found to contain broken tablets and stray tablets for other medications. That led to a recall and shortages of Excedrin products around the world.

At the time, the Excedrin brand was owned by Novartis. An FDA investigation found that Novartis failed to adequately investigate hundreds of consumer complaints of foreign products found in over-the-counter drugs produced at the Nebraska plant. Novartis spent millions of dollars re-tooling the plant and shifted some production to third-party manufacturers.

GSK now holds majority ownership of Excedrin through a joint venture with Novartis. GSK did not say where the new production problems originated.