Acetaminophen PM Extra-Strength 500 mg Rapid Release Gelcaps, 20 ct, QC99368 Sale! This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Compare to the Active Ingredients in Tylenol PM Extra Strength. Temporary relief of occasional headaches and minor aches and pains with accompanying sleeplessness. Non-habit forming. Rapid release gelcaps.