Old and New Analgesic Acetaminophen: Pharmacological Mechanisms Compared with Non Steroidal Anti Inflammatory Drugs Here's how to make Tylenol work way better Dose it correctly: 1,000 mg at a time, spaced every 8 hours. Smaller doses don't control pain as well. Take it Researchers are studying a possible link between acetaminophen (Tylenol) use during pregnancy and higher autism or ADHD risk. It may lower glutathione, an important antioxidant for brain development. Early life acetaminophen exposure, glutathione S transferase genes, and development of adolescent asthma in a high risk birth cohort Journal of Allergy and Clinical Immunology Exposure to acetaminophen and all its metabolites upon 10, 15, and 20 mg kg intravenous acetaminophen in very preterm infants Pediatric Research