Drilldown: Medicines

Methocarbamol (1)

Robaxin (oral, injectable) (1)

[[:Category:Skeletal muscle relaxants|Skeletal muscle relaxant (centrally-acting)]] (1)

None (1)

'"`UNIQ--vote-00000015-QINU`"', '"`UNIQ--vote-00000016-QINU`"' (1)

Oral: 1500 mg PO QID for 2-3 days (load), then 750-1500 mg QID maintenance. IV/IM: 1000 mg every 8 hours for acute spasm (1)

Tablets 500, 750 mg; injection 100 mg/mL (1)

8 g/day (oral, short-term load); 6 g/day (chronic) (1)

intramuscular (1) · intravenous (1) · Oral (1)

~30 minutes (oral) (1)

4-6 hours (1)

1-2 hours'"`UNIQ--ref-00000017-QINU`"' (1)

None · 100% (IV) · ~100% from subcutaneous depot · ~80% (oral)'"`UNIQ--ref-00000027-QINU`"' · 70–90% (oral) · ~100% (oral)'"`UNIQ--ref-0000001C-QINU`"' · ~50% (oral)'"`UNIQ--ref-00000021-QINU`"' · ~95% · '''Saturable''' via the LAT-1 amino-acid transporter, producing nonlinear pharmacokinetics: ~60% at 300 mg single dose, falling to ~35% at 1200 mg single dose'"`UNIQ--ref-0000002A-QINU`"' · 10-20% (oral; reduced by food, calcium, antacids, PPIs, tea/coffee; enhanced by ascorbate) · 100% (IV); essentially complete (oral) · 100% (IV); rapidly neutralized by gastric acid (oral) · 16-21% capsule, 25% suspension (oral; iron and antacids reduce absorption substantially)'"`UNIQ--ref-000009E5-QINU`"' · 25 mg: ~29%; 50 mg: ~35%; food reduces absorption'"`UNIQ--ref-00000C4F-QINU`"' · 30-40% (oral; increases with repeated dosing as gastric pH rises)'"`UNIQ--ref-000000DF-QINU`"' · 40-45% (oral; not significantly affected by food)'"`UNIQ--ref-0000025C-QINU`"' · 40-80% (oral); reduced by food, calcium, iron, PPIs, fiber; take fasting with water'"`UNIQ--ref-00000037-QINU`"' · 42-58% (oral; dose-dependent)'"`UNIQ--ref-00000AEF-QINU`"' · 50-60% (oral; decreased with food, but food given anyway for GI tolerance)'"`UNIQ--ref-00000019-QINU`"' · 60-70% PO at low doses; saturable at high doses (parenteral routes preferred above 15-25 mg/week)'"`UNIQ--ref-000007C9-QINU`"'

Other values:

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Limited human data.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1)

[[USLegal:Prescription only|Rx-only]] in US. Not a controlled substance, distinguishing it from carisoprodol which is Schedule IV'"`UNIQ--ref-00000019-QINU`"' (1)