Posatex Ear Drops Suspension for Dogs Pharmaceutical precautions This veterinary medicinal product does not require any special storage conditions. Do not use after the expiry date, which is stated on the label. Shelf-life after first opening the bottle: 17.5 and 35.1 ml bottles: Once opened use within 28 days. Ask your veterinary surgeon how to dispose of medicines no longer required. These measures should help to protect the environment.