When most people talk about bringing out the crystal, they are often referring to a type of glass that is made from silica, lead oxide, soda or potash, and other additives. Lead crystal is prized for its durability and decorative properties, even if it does not necessarily possess a crystalline structure.
Safe Dosage of Acetaminophen. Acetaminophen is a very safe drug only if it is used within therapeutic doses. The safe dose is 3 grams per day and the maximum daily dose is 4g per day for adults. However, the elderly who tend to have a lower body weight than younger adults should not exceed the safe dose.
Tylenol contains acetaminophen. The maximum daily dose of acetaminophen must not exceed 4000 mg ('daily' means 24 hours). It is not recommended to take more than 1000 mg of acetaminophen at a time. The interval between 1000 mg doses should be about 6 hours. 500 mg doses can be taken more frequently, e.g. every four hours. Each Tylenol 500 gelcap, etc, contains 500 mg of pure acetaminophen.