Advil is a brand name for the drug ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain, fever, and inflammation. H2 blockers are a class of drugs that reduce the production of stomach acid and are used to treat conditions such as gastroesophageal reflux disease (GERD) and ulcers.

According to the sources provided, there are no known interactions between Advil and H2 blockers. However, it is always recommended to consult with a healthcare provider before taking any medication, especially if you are taking other medications or have underlying health conditions.

It is also important to note that the Federal Aviation Administration (FAA) has specific regulations regarding the use of over-the-counter medications by pilots. According to the FAA's OTC Medications for Pilots guide [3], ibuprofen is allowed for use by pilots, but only in certain dosages and with certain restrictions. Pilots should always check with their aviation medical examiner before taking any medication.

In summary, while there are no known interactions between Advil and H2 blockers, it is important to consult with a healthcare provider before taking any medication, especially if you are taking other medications or have underlying health conditions. Additionally, pilots should always check with their aviation medical examiner before taking any medication, including ibuprofen.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.ncbi.nlm.nih.gov/books/NBK310269/
[3] https://www.faa.gov/licenses_certificates/medical_certification/media/OTCMedicationsforPilots.pdf