The normal dosage on the bottle of Tylenol is safe. Tylenol is okayto take during pregnancy, however ibufrofen, nuprin, and aspirinare not. As long as you don't take more Tylenol than directed. Rolaids is an American brand of calcium-based antacid produced by Chattem. It was invented by American chemist Irvine W. Grote in the late 1920s, and originated with manufacturing in Chattanooga, Tennessee under one of Chattem's forerunner companies, which manufactured the brand for Warner-Lambert; Warner-Lambert merged with Pfizer in 2000. Learn about the potential side effects of Tylenol Extra Strength (acetaminophen). Includes common and rare side effects information for consumers and healthcare professionals. Common concerns. What about Tylenol (acetaminophen)? Take no more than 2000 mg per day for occasional use (6 regular tablets or 4 extra strength tablets). Acetaminophen is a drug used to relieve pain and reduce fever. Most people don't experience side effects with this drug when it is used appropriately. Common side effects are nausea, rash, and headache. Adverse and serious side effects are kidney damage, anemia, anyphylaxis, and liver failure. Doctors give trusted answers on uses, effects, side-effects, and cautions: Dr. Cordas on b12 mcg vs mg: Vitamin B12 is more effective and more sure to deliver the vitamin to the body. Acetaminophen is the generic name for Tylenol, a pain reliever and fever reducer. It's one of the most widely used pain medications in the world. Each Extra Strength TYLENOL PM Caplet, Geltab or Gelcap contains acetaminophen 500 mg and diphenhydramine HCl 25 mg. ACTIONS. Extra Strength TYLENOL PM Caplets, Geltabs and Gelcaps contain a clinically proven analgesic-antipyretic and an antihistamine. Find out how much acetaminophen (often sold under the brand name Tylenol) to give your child. Weight (not age) determines the correct dose. Ball and Stick Model for Acetaminophen Molecule. To View the Acetaminophen Molecule in 3D--- in 3D with Jmol. Chemical and Physical Properties of Tylenol Molecule-Acetaminophen.