Niacin extended-release tablets USP should be taken at bedtime, after a low-fat snack, and doses should be individualized according to patient response. Therapy with niacin extended-release tablets USP must be initiated at 500 mg at bedtime in order to reduce the incidence and severity of side effects which may occur during early therapy. The recommended dose escalation is shown in Table 1 below.
Table 1. Recommended Dosing
Week(s)
Daily Dose
Niacin Dosage
*
After Week 8, titrate to patient response and tolerance. If response to 1000 mg daily is inadequate, increase dose to 1500 mg daily; may subsequently increase dose to 2000 mg daily. Daily dose should not be increased more than 500 mg in a 4-week period, and doses above 2000 mg daily are not recommended. Women may respond at lower doses than men.
INITIAL
TITRATION
SCHEDULE
1 to 4
500 mg
1 Niacin Extended-release Tablet USP, 500 mg at
bedtime
5 to 8
1000 mg
1 Niacin Extended-release Tablet USP, 1000 mg or
2 Niacin Extended-release Tablets USP, 500 mg at bedtime
*
1500 mg
2 Niacin Extended-release Tablets USP, 750 mg or
3 Niacin Extended-release Tablets USP, 500 mg at bedtime
*
2000 mg
2 Niacin Extended-release Tablets USP, 1000 mg or
4 Niacin Extended-release Tablets USP, 500 mg at bedtime
Maintenance Dose
The daily dosage of niacin extended-release tablets USP should not be increased by more than 500 mg in any 4-week period. The recommended maintenance dose is 1000 mg (two 500 mg tablets or one 1000 mg tablet) to 2000 mg (two 1000 mg tablets or four 500 mg tablets) once daily at bedtime. Doses greater than 2000 mg daily are not recommended. Women may respond at lower niacin extended-release tablets USP doses than men [see CLINICAL STUDIES (14.2)].
Single-dose bioavailability studies have demonstrated that two of the 500 mg and one of the 1000 mg tablet strengths are interchangeable but three of the 500 mg and two of the 750 mg tablet strengths are not interchangeable.
If lipid response to niacin extended-release tablets USP alone is insufficient or if higher doses of niacin extended-release tablets USP are not well tolerated, some patients may benefit from combination therapy with a bile acid binding resin or statin [see DRUG INTERACTIONS (7.3), Concomitant Therapy below and CLINICAL STUDIES (14.3, 14.4)].
Tolerance to flushing of skin develops rapidly over the course of several weeks. Flushing, pruritus, and gastrointestinal distress are also greatly reduced by slowly increasing the dose of niacin and avoiding administration on an empty stomach. Concomitant alcoholic, hot drinks or spicy foods may increase the side effects of flushing and pruritus and should be avoided around the time of niacin extended-release tablets USP ingestion.
Equivalent doses of niacin extended-release tablets USP should not be substituted for sustained-release (modified-release, timed-release) niacin preparations or immediate-release (crystalline) niacin [see WARNINGS AND PRECAUTIONS (5)]. Patients previously receiving other niacin products should be started with the recommended niacin extended-release tablets USP titration schedule (see Table 1), and the dose should subsequently be individualized based on patient response.
If niacin extended-release tablets USP therapy is discontinued for an extended period, reinstitution of therapy should include a titration phase (see Table 1).
Niacin extended-release tablets USP should be taken whole and should not be broken, crushed or chewed before swallowing.
Concomitant Therapy
Concomitant Therapy with Lovastatin or Simvastatin
Patients already receiving a stable dose of lovastatin or simvastatin who require further TG-lowering or HDL-raising (e.g., to achieve NCEP non-HDL-C goals), may receive concomitant dosage titration with niacin extended-release tablets USP per niacin extended-release tablets USP recommended initial titration schedule [see DOSAGE AND ADMINISTRATION (2)]. For patients already receiving a stable dose of niacin extended-release tablets USP who require further LDL-lowering (e.g., to achieve NCEP LDL-C goals), the usual recommended starting dose of lovastatin and simvastatin is 20 mg once a day. Dose adjustments should be made at intervals of 4 weeks or more. Combination therapy with niacin extended-release tablets USP and lovastatin or niacin extended-release tablets USP and simvastatin should not exceed doses of 2000 mg niacin extended-release tablets USP and 40 mg lovastatin or simvastatin daily.
Dosage in Patients with Renal or Hepatic Impairment
Use of niacin extended-release tablets USP in patients with renal or hepatic impairment has not been studied. Niacin extended-release tablet USP is contraindicated in patients with significant or unexplained hepatic dysfunction. Niacin extended-release tablets USP should be used with caution in patients with renal impairment [see WARNINGS AND PRECAUTIONS (5)].