Luden’s, Rite Aid, Walgreens & CVS brands of Throat Drops/Cough Drops bear an O/UD (dairy) due to dairy equipment, not due to dairy ingredients.
From The KIB: Pesach News – Avocado Oil and Spray
All Pure Virgin Avocado Oil & Spray (without additives), are fine for use on Pesach without a special Pesach designation on the label.