It depends on your weight too, but normally you shouldn’t exceed 4g of acetaminophen (Tylenol) per day. For instance, 5 generic Vicodin pills would give about 2.5 grams of acetaminophen at once, which gets really close to a toxic level of acetaminophen per day. You should never exceed 4 grams of Tylenol per day because you risk having serious liver damage. Also, it’s not recommended to continue getting close to 4grams of Tylenol each day (about 8 generic Vicodin pills), because in time your liver might suffer consequences.

Liver damage could possibly cause liver failure which is a critical thing, since accidental or intentional acetaminophen overdose is one reason why young people end up needing liver transplants or risk dying.

Sometimes you’ll see that there’s a price difference between Vicodin pills, and that might be because of the generic vs regular Vicodin pricing.

The generic Vicodin is almost as the regular Vicodin, although the price is lower and there might be a small variance (5%) on the effect offered by each of them.

As an example:

Regular Vicodin (acetaminophen/hydrocodone)
Manufacturer: Abbott Laboratories DEA/FDA: Schedule III
Approximate Retail Price tablet: 5-500 mg (30 ea): $45.99

Regular Lortab (acetaminophen/hydrocodone)
Manufacturer: UCB Pharma, Inc. DEA/FDA: Schedule III
Approximate Retail Price tablet: 5-500 mg (30 ea): $40.65

Generic Vicodin (acetaminophen/hydrocodone)
Manufacturer: generic DEA/FDA: Schedule III
Approximate Retail Price tablet: 5-500 mg (30 ea): $11.99

As shown above, the generic one is cheaper because is a no-name one, just like with hardware you have retail and oem versions, with pills you have generic and regular Vicodin.