Otomax Ear Drops Suspension Dosage and administration For otic use only. Shake the product well before administration Dogs weighing less than 15 kg: apply 4 drops to the ear twice a day. Dogs weighing more than 15 kg: apply 8 drops to the ear twice a day. The duration of treatment is 7 days. After application the base of the ear may be massaged briefly and gently to allow the preparation to penetrate to the lower part of the ear canal.