Nonsterile Preparations Practice Test

A 4-year-old male (weight 18 kg) with epilepsy is unable to swallow tablets. The prescriber orders: levetiracetam oral suspension $100\ \text{mg/mL}$, give $2.5\ \text{mL}$ by mouth twice daily, dispense $150\ \text{mL}$. The child has a documented allergy to FD&C Red No. 40, and the caregiver requests a dye-free preparation. The pharmacy will compound the suspension from commercially available levetiracetam tablets using a dye-free vehicle. What is the most important counseling point for this compounded medication?

A 70-year-old male (weight 60 kg) with dysphagia is prescribed a compounded oral solution because he cannot swallow tablets. Prescription: omeprazole oral suspension $2\ \text{mg/mL}$, take $10\ \text{mL}$ by mouth daily, dispense 200 mL. The pharmacist plans to compound from omeprazole capsules using an appropriate vehicle to protect the drug from acid degradation. Which compounding error could compromise the preparation's stability?