I believe the standard Tylenol (acetaminophen) is 250mg and there are some that are as much as 500 or 650mg. Chad is correct, anything over 3,000 mg in a day is very dangerous to the liver and Skyler got it right that mixing acetaminophen + alcohol lowers the effective "safe dose" level.

Ibuprofen is considered by some to be safer, but aspirin has been around for well over 100 years and, except for those under 16 (mild risk of Reye's syndrome) or those prone to ulcers (increased risk of stomach bleeding), aspirin is the easiest broken down and used by the body, arguably the most effective on inflammatory pain, least expensive, and is very effective.

Sometimes the oldest, cheapest solutions are still the best, in spite of what the pharmaceutical lobby would have you believe.