Tylenol Arthritis Pain Caplet, 100 count bottles: Recall of all lots. McNeil Consumer Healthcare and the FDA has notified consumers that it is expanding a voluntary recall to include all available product lots of TYLENOL Arthritis Pain Caplet 100 count bottles, with the distinctive red EZ-OPEN CAP. In November 2009, 5 lots of this product were recalled due to consumer reports of an unusual moldy, musty, or mildew-like odor that was associated with nausea, stomach pain, vomiting and diarrhea. The odor is caused by the presence of a chemical 2,4,6-tribromoanisole, believed to be the breakdown of a chemical used to treat wooden pallets that transport and store packaging materials. The health effects of this compound have not been well studied.