Pharmacological class Drug Impaired metabolism Type of reaction
Analgesics (opioids) morphine yes glucuronidation
NSAIDs salicylic acid
paracetamol
no
no
glucuronidation
glutation conjugation
Antibiotics isoniazid no acetylation
NSAIDs - Non-steroidal anti-inflammatory drugs
Table 4: Phase II drug biotransformation characteristics in the elderly (modified from Turnheim).