Pain Management in Kidney Stones

First-Line Analgesics

Acetaminophen is the safest first-line medication for patients with kidney stones who have contraindications to NSAIDs, with a maximum daily dose of 3000 mg/day (typically 650 mg every 6 hours) 1
NSAIDs should be used with caution in patients at high risk for renal, GI, cardiac toxicities, thrombocytopenia, or bleeding disorders 2
Short-term use of ketorolac (15-30 mg IV, three times daily for maximum of 5 days) can be considered for acute management 2

NSAIDs should generally be avoided in patients with chronic kidney disease (CKD) due to their nephrotoxic effects 1
For patients with CKD or end-stage kidney disease (ESKD), acetaminophen is the preferred first-line agent 1
Topical analgesics such as lidocaine 5% patch and diclofac gel can be used for localized pain without significant systemic absorption in patients with kidney disease 1, 3

Gabapentin or pregabalin can be used for neuropathic pain components but require significant dose adjustment in patients with kidney disease 1, 3
Gabapentin should start at 100-300 mg at night with careful titration in patients with kidney disease 1

Fentanyl and buprenorphine are the safest opioids for patients with kidney disease due to their favorable pharmacokinetic profiles 1
When using opioids, implement risk mitigation strategies and obtain informed consent after discussing goals, expectations, risks, and alternatives 1
Proactively prescribe laxatives for prophylaxis and management of opioid-induced constipation 1

Application of local heat can provide significant relief for musculoskeletal pain without affecting renal function 1, 3
Physical activity/exercise programs should be considered as initial treatment for musculoskeletal pain 1
For chronic pain, prescribe analgesics on a regular basis rather than "as required" schedule 1

Regular pain assessment using validated tools is essential for quality care 1, 4
Monitor for NSAID toxicities with baseline blood pressure, BUN, creatinine, liver function studies, CBC, and fecal occult blood tests; repeat every 3 months 2
Always include rescue doses of medications for breakthrough pain episodes 1
Discontinue NSAIDs if BUN or creatinine doubles, if hypertension develops or worsens, or if liver function studies increase beyond normal limits 2