Maximally tolerated dose: The highest statin dose the patient can tolerate. If statin intolerance is due to muscle symptoms, a causal relationship between the statin and symptoms must be established and documented (symptom resolution after discontinuation, recurrence on re-challenge at a lower dose, and occurrence after switching to an alternative statin).
Operational note — documenting intolerance: For muscle-symptom–related intolerance, document evidence of pain, tenderness, stiffness, cramping, weakness, and/or fatigue; symptom resolution after stopping the statin; symptoms on re-challenge and with an alternative statin; and exclusion of non-statin causes (e.g., hypothyroidism, renal or hepatic dysfunction, rheumatologic disorders, steroid myopathy, vitamin D deficiency, or primary muscle disease). Rhabdomyolysis diagnosis should be supported by acute neuromuscular illness or dark urine and an acute CK elevation (usually > 5,000 IU/L or 5x ULN).
Definition entry: 'Maximally tolerated dose' as used in this policy refers to the highest statin dose the patient can tolerate, with required documentation when intolerance limits dosing.