Acetaminophen PM Extra-Strength 500 mg Caplets, 100 ct, QC95461 Quality Choice Sale! This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. 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. Temporary relief of occasional headaches and minor aches and pains accompanying sleeplessness.