Note: This document contains side effect information about simethicone. Some dosage forms listed on this page may not apply to the brand name Alka-Seltzer Anti-Gas.

Applies to simethicone: oral capsule liquid filled, oral solution, oral suspension, oral tablet, oral tablet chewable.

There have not been any common or important side effects reported with this medicine. However, if you notice any side effects, check with your doctor.

For Healthcare Professionals

Applies to simethicone: compounding liquid, compounding powder, oral capsule, oral disintegrating strip, oral liquid, oral suspension, oral tablet, oral tablet chewable.

Gastrointestinal

Uncommon (0.1% to 1%): Constipation, nausea

Rare (0.01% to 0.1%): Tongue edema^[Ref]

Hypersensitivity

Rare (0.01% to 0.1%): Face edema, hypersensitivity reactions^[Ref]

Respiratory

Rare (0.01% to 0.1%): Respiratory difficulty^[Ref]

Dermatologic

Rare (0.01% to 0.1%): Pruritus, rash^[Ref]