A patient is taking levetiracetam (Keppra) to treat seizures. Routine education for levetiracetam includes reminding them:

Otitis externa is an infection and inflammation of the external auditory canal, commonly caused by bacterial pathogens such as Pseudomonas aeruginosaand Staphylococcus aureus. It typically presents with ear pain, tenderness of the tragus, and sometimes discharge. Treatment is primarily topical because it delivers high local drug concentrations directly to the infected area. When the tympanic membrane is intact, combination antibiotic and anti-inflammatory ear drops are commonly used for effective symptom relief.

Rationale:
A. Cromolyn sodium (Opticrom) is a mast cell stabilizer used primarily for allergic conjunctivitis, not bacterial ear infections. It has no antibacterial activity and does not treat the infectious or inflammatory process seen in otitis externa. Therefore, it is not appropriate for managing this condition.

B. Ciprofloxacin otic drops (Ciloxan) are effective against common bacterial causes of otitis externa, but they do not provide anti-inflammatory effects. While they may treat infection, adding a corticosteroid improves symptom relief by reducing canal inflammation, edema, and pain more rapidly.

C. Ciprofloxacin/hydrocortisone otic (Cipro HC) is the most appropriate choice because it combines antibacterial coverage with anti-inflammatory effects. Ciprofloxacin treats the bacterial infection, while hydrocortisone reduces inflammation, pain, and swelling in the external auditory canal. This dual action provides faster symptom relief and improved clinical outcomes in otitis externa with an intact tympanic membrane.

D. High-dose amoxicillin is not effective for otitis externa because it does not adequately cover common pathogens such as Pseudomonas aeruginosa. Additionally, systemic antibiotics are not first-line therapy for uncomplicated otitis externa when the infection is localized to the ear canal. Topical therapy is preferred due to higher local concentrations and better efficacy.

Scabies is a contagious skin infestation caused by the mite Sarcoptes scabiei, which burrows into the epidermis and causes intense itching and a papular rash. Transmission commonly occurs through prolonged skin-to-skin contact, making household spread very common. Effective management requires both pharmacologic treatment and prevention of reinfestation. Treating close contacts and addressing environmental contamination are essential parts of care.

Rationale:
A. All family members and close household contacts should be treated simultaneously, even if they do not yet have symptoms. Symptoms may take several weeks to appear after initial infestation, but transmission can still occur during this asymptomatic period. Simultaneous treatment prevents reinfestation cycles and is a standard recommendation in scabies management to ensure complete eradication.

B. Treatment is not best with oral therapies because first-line management is usually with topical scabicides such as Permethrin 5% cream. Oral Ivermectin may be used in certain severe cases such as crusted scabies or outbreaks, but it is not the routine initial therapy for uncomplicated infestations. Topical treatment remains the preferred standard in most patients.

C. Itching does not resolve immediately after treatment and may persist for several weeks despite successful eradication of the mites. This continued itching occurs because of an ongoing hypersensitivity reaction to dead mites and their products. Patients should be taught that persistent itching does not necessarily mean treatment failure, which helps reduce unnecessary retreatment.

D. Lindane is not the medication of choice during pregnancy because of its potential neurotoxicity and risk of systemic absorption. It is generally avoided in pregnant patients, infants, and individuals with seizure disorders. Safer alternatives such as permethrin are preferred because they have a better safety profile and are more effective.