Why does the series say 'secondary to alcohol abuse'?
That is the population they measured. It is also a reminder that a drink plus 500 mg is already a CNS-depressant warning on every liver. The drink page is alcohol with methocarbamol.
Tell the real drinking history before the first swallow. A 'social' story that hides cirrhosis hides the 3.38-hour clock.
Why are the hours different if the dose is the same?
Clearance dropped about 70%. Half-life is what you see when clearance falls and the body still has a volume to work through. 3.38 versus 1.11 is that slower exit, not a stronger tablet.
Do not 'correct' the hours by adding extra 500 mg because spasm won. Extra tablets sit longer too.
Does DailyMed write a cirrhosis milligram?
No specific dose-adjustment table follows that paragraph. StatPearls notes clearance is reduced and that one series tolerated 500 mg twice daily in cirrhosis. That is a cited inpatient-style total, not a license to run 6 g at home.
The labelled 6 g opening is a healthy-adult burst. Copying twelve 500 mg tablets onto a cirrhotic day is how fog becomes a fall. Healthy t1/2: the 1-2 hour scan.
What did the labelled cirrhosis series measure?
Eight patients with cirrhosis after alcohol abuse versus eight matched normal subjects. Mean total clearance fell about 70%. Mean half-life stretched to 3.38 hours from 1.11 hours. Those two numbers are the same finding: the drug left more slowly.
The tablet file does not then walk you through a new milligram table for Child-Pugh rows. A clinician has to choose whether 500 mg belongs at all.
Is this the same as the hemodialysis paragraph?
No. Hemodialysis in 8 patients showed about 40% lower clearance with a half-life still near 1.2 versus 1.1 hours. That is a different special-population sentence. This scan stays on cirrhosis hours.
Do not borrow a gabapentinoid dialysis supplement and write it onto methocarbamol. Different molecule.
What do you ask if the chart already says cirrhosis?
Ask whether any methocarbamol belongs, and at what daily total. Bring the other sedatives. Ask who watches for confusion and falls on night one.
If 500 mg is written, treat first doses as heavier than a healthy 1-2 hour story. Keys still follow sedation signal.