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Loop diuretics (furosemide, bumetanide, ethacrynic acid) can cause dose-related ototoxicity, especially with rapid IV administration or in combination with aminoglycosides. Thiazides and potassium-sparing diuretics do not cause significant ototoxicity.

Chloramphenicol crosses the placenta and can cause gray baby syndrome due to immature glucuronidation in neonates, leading to hypotension, cyanosis, and death. Amoxicillin and clindamycin are safe in pregnancy. Ciprofloxacin is avoided due to cartilage effects but not gray baby syndrome. Pharmacists must screen for teratogenic antibiotics.

The standard adherence measure in quality programs is PDC ≥80%. It directly reflects medication possession and adherence, strongly linked to reduced cardiovascular events. LDL reduction (B) measures effectiveness but may be influenced by factors beyond adherence. Counseling sessions (C) and prescription counts (D) are process metrics, not adherence outcomes.

For COPD patients with persistent exacerbations despite LABA, adding an inhaled corticosteroid improves outcomes. Combination LABA + ICS is guideline-directed therapy. SABAs are rescue only, not maintenance. Theophylline and chronic oral steroids are not preferred due to toxicity.

MAOIs inhibit norepinephrine breakdown. Pseudoephedrine is a sympathomimetic that increases norepinephrine release. Combination can trigger hypertensive crisis. Patients on MAOIs must avoid sympathomimetics, tyramine-rich foods, and serotonergic drugs. Safer alternatives: saline sprays or non-sympathomimetic agents.