The maximum dosage of simethicone, the active ingredient in Gas-X, for adults and teenagers is 500 milligrams in 24 hours, states Drugs.com. A doctor should determine the appropriate dosage for children. Gas-X extra-stre... More »

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Acetaminophen 500 milligrams is an over-the-counter, extra-strength dose, according to the Tylenol website. At a 500 milligram dose, users should not take more than six caplets in 24 hours. More »

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Tylenol lists its recommended and maximum dosages differently, depending on strength of the acetaminophen dose in each capsule. Acetaminophen is the active ingredient in Tylenol, and its strength in the capsules is measu... More »

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Drugs.com indicates that simethicone, the active ingredient in over-the-counter gas medications like Gas X, has not been categorized by the Food and Drug Administration due to insufficient controlled data. Medical author... More »

For generalized pain, adults are advised to take 200 to 400 milligrams of ibuprofen every four to six hours, states Drugs.com. The recommended dose for infants and children between 6 months and 12 years of age with fever... More »

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WebMD reports that Gas-X contains simethicone, which works to break up gas bubbles in the digestive system. This feature of simethicone provides relief to individuals who suffer from flatulence, bloating and gas pain. Th... More »

Common oral dosages of benzonatate for adults and children over 10 is 100 milligrams to 200 milligrams three times daily as needed for cough relief, states Drugs.com. Benzonatate is non-narcotic, but it is unknown whethe... More »

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