Is it dangerous to take 1 5mg pill of hydrocodone if i take another 500mg pill of acetaminaphin?

"Another": Tylenol (acetaminophen) 500 mg suggests you've already taken 500 mg...Adding vicodin to 1000mg of tylenol (acetaminophen) may not be appropriate.

Maximum dose: Tylenol, or acetaminophen, can be toxic to the liver in high doses. The maximum recommended daily dose of Acetaminophen is generally 4, 000mg over 24 hours. Taking a single 500mg Acetaminophen would generally be safe.