When it comes to dosing intervals for Tylenol (acetaminophen) and Advil (ibuprofen), it is crucial to follow the recommended guidelines to ensure safe and effective use of these medications. According to the University of Michigan's Mott Children's Hospital [3], the dosing intervals for Tylenol are typically every 4-6 hours, with a maximum of 5 doses in 24 hours. For Advil, the dosing interval is usually every 6-8 hours, with a maximum of 4 doses in 24 hours. It is important to note that these intervals can vary based on the individual's age, weight, and medical condition, so consulting a healthcare provider or referring to the specific dosing instructions on the medication packaging is advisable.

Sources:
[3] https://www.med.umich.edu/mott/pdf/mott-tylenol-ibuprofen-dosage-chart.pdf