Can I Give My Dog Gas-X?

Yes, with care
Simethicone is commonly referenced for dogs at published doses. Published guidance for dogs: small: 20-40 mg; medium: 40-80 mg; large: 80-160 mg, every 8-12h. Gas discomfort only. Sudden bloated hard abdomen in large breeds = GDV emergency, go to an ER now, do not medicate.
Source: Veterinary Partner (VIN)
Get the exact range for your dog's weight

Skip it or ask a vet first if

suspected GDV/bloat. ER immediately

The safe habit

Confirm any medication decision with your veterinarian, who knows your dog's health history and other medications. VetDose shows published reference data, not prescriptions.