Pfizer, the world’s largest drug manufacturer, recalled about one million packets of Lo/Ovral-28 and its generic equivalent this week when a manufacturing error was discovered.

The problem was in the packaging. A 28-day supply comes in a package with 21 active pills and 7 inert, to be taken at the end of the cycle. The mix-up increases the chance of unplanned pregnancy by making it likely that the patient would take the inert pills at the wrong time.

The company estimates that only 30 or so packets were flawed, but recalled the entire lot to be safe.

If you or a loved one takes Lo/Ovral-28 or its generic equivalent, check the FDA’s Web site for the recalled lot numbers.

If you have been taking the recalled pills, call our office and we will discuss your options with you.