OftanIDU is a medication used to treat eye conditions such as conjunctivitis and keratitis. The spelling of this word is based on the International Phonetic Alphabet (IPA) system. Let's break down the phonetic transcription: "ɔf'tan" represents the first syllable, which is pronounced with an open-mid back unrounded vowel followed by a t and an unstressed vowel similar to a schwa sound. The second syllable, "aɪ'diː", consists of a diphthong representing the sound of "i", followed by a long vowel "iː". Overall, the pronunciation of OftanIDU is "off-tahn-eye-dee-yoo."