NCLEX Review Guide: Antiinfective Ear Medications

Classification and Mechanism

• Ototopical antibiotics are medications applied directly to the ear canal to treat bacterial infections of the external and middle ear. These medications work by disrupting bacterial cell wall synthesis or protein production to eliminate pathogenic organisms.
• Common antiinfective ear medications include aminoglycosides (neomycin, gentamicin), fluoroquinolones (ciprofloxacin, ofloxacin), and polymyxin B combinations which target gram-positive and gram-negative bacteria effectively.

Frequently Used Antiinfective Ear Drops

• Ciprodex (ciprofloxacin/dexamethasone) combines antibiotic and anti-inflammatory properties, making it ideal for treating infected ears with significant inflammation and pain.
• Cortisporin (neomycin/polymyxin B/hydrocortisone) provides broad-spectrum coverage against both gram-positive and gram-negative bacteria while reducing inflammatory response.

1. Wash hands thoroughly and gather supplies
2. Warm medication to room temperature by rolling between palms
3. Position patient on unaffected side or sitting with head tilted
4. Straighten ear canal: pull pinna up and back for adults, down and back for children under 3
5. Instill prescribed number of drops without touching dropper to ear
6. Gently massage tragus to facilitate medication distribution
7. Have patient remain in position for 5 minutes
8. Insert cotton ball loosely if ordered to prevent drainage

Assessment and Monitoring

• Never irrigate or instill medications if tympanic membrane perforation is suspected as this can push infection deeper into the middle ear and potentially cause hearing loss or vestibular damage.
• Assess for signs of ototoxicity including hearing loss, tinnitus, vertigo, and balance problems especially with aminoglycoside-containing preparations that can damage cranial nerve VIII.

Essential Teaching Points

• Instruct patients to complete the full course of antibiotic therapy even if symptoms improve to prevent bacterial resistance and ensure complete eradication of infection.
• Teach patients to avoid getting water in the affected ear during treatment and to use earplugs or cotton balls coated with petroleum jelly when showering to prevent reinfection.