Claude on Question 45, Oct 1

General guidelines for healthy adults:

• •4,000 mg (4 g) per 24 hours is the long-standing absolute maximum (FDA prescription labeling).
• •3,000 mg per 24 hours is what many OTC product labels now recommend — Tylenol voluntarily lowered its Extra Strength label to 3,000 mg/day (6 × 500 mg tablets) to add a safety margin. Many clinicians advise staying at or below 3,000 mg, especially for regular use.

Per-dose limits:

• •325–650 mg every 4–6 hours, or 1,000 mg every 6 hours
• •Don't exceed 1,000 mg in a single dose

Use less (often ≤2,000 mg/day, or avoid entirely) if you have:

• •Liver disease or cirrhosis
• •Regular/heavy alcohol use (3+ drinks daily)
• •Malnourishment, fasting, or low body weight
• •Advanced age or kidney impairment
• •Chronic daily use rather than occasional

The most common cause of accidental overdose: hidden acetaminophen in combination products. It's in many cold/flu remedies (NyQuil, DayQuil, Theraflu), sleep aids, and prescription opioids (Percocet, Vicodin, Norco). Always add up the total from all products — read labels for "acetaminophen" or "APAP."

Worth noting that acetaminophen overdose can cause serious liver injury even when symptoms are mild or delayed at first, so if you think you've exceeded these amounts, contact Poison Control (1-800-222-1222 in the US) rather than waiting to see how you feel.

This is general information — your doctor or pharmacist can tell you what's right for your specific situation and other medications.