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Rational dosing of gabapentin and pregabalin in chronic kidney disease Mena Raouf,1 Timothy J Atkinson,1 Meredith W Crumb,1 Jeffrey Fudin2–5 1VA Tennessee Valley Healthcare System, Murfreesboro, Nashville, TN, 2Stratton VA Medical Center, 3Albany College of Pharmacy and Health Sciences, Albany, NY, 4Western New England University College of Pharmacy, Springfield, MA, 5Scientific and Clinical Mild Kidney Problems (CrCl 60-90 mL/min): Dose Adjustment: 900 - 3600 mg/day TID. How Often to Take: 3 times a day. Notes: Monitor for dizziness or double vision. Moderate Kidney Problems (CrCl 30-59 mL/min): Dose Adjustment: 400-1400 mg/day BID; How Often to Take: Twice a Day; Notes: Your doctor will decide the best dose for you. Severe Kidney Conclusion: Appropriate dosing of GPs is particularly important to minimize the risk of adverse events in patients of older age, with a history of seizures, or concomitant antipsychotic use. There is a need for prescriber education given the high frequency of inappropriate GP dosing observed in patients with advanced kidney disease. Usual initial gabapentin dose: 300mg q8h. Usual maintenance dose: 300-600mg q8h. Maximum dosage/day: 3600 mg. [15-29]: Dosage range: 200-700mg/day. [<15]: 100-300 mg/day. Use lower end of this range for CRCL <7.5 ml/min. TABLE 1. Gabapentin Dosage Based on Renal Function. TID = Three times a day; BID = Two times a day; QD = Single daily dose. a. Patients with chronic kidney disease often receive dangerously high gabapentin dosage for their kidney function, which can lead to all sorts of problems. An alternative we recommend instead of Gabapentin is Alpha Lipoic Acid. People most commonly use alpha-lipoic acid for nerve pain in cases of diabetes. Drug dosing requirements for antihypertensives in patients with chronic kidney disease are listed in Table 4. 4, 5 Thiazide diuretics are first-line agents for treating uncomplicated hypertension normal renal function on maximum recommended dosing yielded concentrations of ~5–8 mg/L for gabapentin and 2.8–8.2 mg/L for pregabalin.22–25 The elimination half-lives of gabapentin and pregabalin are prolonged with renal impairment leading up to accumulation with repeated dosing. Challenges in pain management in patients with kidney disease. Pain assessment. This should start with assessment of a) pain severity using various standardized tools, most common of which is the numerical rating scale []; b) pathophysiologic evaluatio n into mechanism of injury and type of pain; c) psychosocial evaluation of co-occurring factors that contribute to pain or make treatment of Gabapentin dosing ranges from 100 to 3600 mg daily and pregabalin dosing is 25 to 600 mg daily. 1, 2 Gabapentin and pregabalin exhibit greater than 90% kidney elimination and adjustments to dose and frequency are recommended for patients with chronic kidney disease (CKD). 1, 2 For patients with a creatinine clearance (CrCl) below 60 mL/min, a do With a growing chronic kidney disease epidemic, 22,23 an increasing number of patients with chronic kidney disease will be exposed to gabapentin. This study demonstrates that gabapentin dosage for patients with chronic kidney disease has been insufficiently adjusted and that the risk of gabapentin toxicity has been underrecognized. Pain is one of the most common and distressing symptoms among patients with chronic kidney disease (CKD) . The prevalence of pain has been associated with substantially lower health-related quality of life and greater psychosocial distress, insomnia, and depressive symptoms [ 2-9 ]. Rational dosing of gabapentin and pregabalin in chronic kidney disease Patients with chronic kidney disease often receive inappropriately high gabapentin dosage for their kidney function, occasioning overt toxicity; advanced age and comorbidity predispose these patients for toxicity. Gabapentin Dosage Guidelines in Adults, Adolescents 12 Years of Age and Older with Renal Impairment 1-5. Gabapentin’s apparent total clearance is 100 mL/min in adults with normal renal function, which is essentially equivalent to CrCl and does not suggest the involvement of tubular reabsorption. 1 Some evidence suggest that active tubular secretion mediated by organic cation transporter-1 (OCT-1) may play a role in gabapentin’s renal clearance. DOSE IN RENAL IMPAIRMENT GFR (mL/MIN) 30–60 Start at low dose and increase dose according to response15–30 Start at low dose and increase dose according to response15 300 mg on alternate days or 100 mg at night initially, increase according to tolerability DOSE IN PATIENTS UNDERGOING RENAL REPLACEMENT THERAPIES Per Lexicomp, Gabapentin’s recommended dose in patients with renal impairment is as follows: CrCl >15 to 29 mL/minute: 200 to 700 mg once daily. CrCl 15 mL/minute: 100 to 300 mg once daily. In patients with normal renal function, the maximum dose of gabapentin is 3600mg daily in divided doses. However, gabapentin is renally cleared and so the dose needs to be adjusted according to the GFR. For patients on dialysis, the recommended dose is 100-300mg post dialysis on dialysis days only. The short answer is: yes, gabapentin can be problematic for individuals with kidney failure and chronic kidney disease (CKD). While gabapentin is often prescribed for pain management, particularly nerve pain, and sometimes for seizures, its primary elimination pathway is through the kidneys.
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