Knee Lateral Collateral Ligament Injury. Lateral collateral ligament (LCL) is a thin set of tissues present on the outer side of the knee, connecting the thighbone (femur) to the fibula (side bone of lower leg). It provides stability as well as limits the sidewise rotation of the knee.
OTC Pain Relief: Understanding Acetaminophen. Youâve probably taken acetaminophen at one time or another for fever or pain relief. You may know acetaminophen as the active ingredient in Tylenol and many other over-the-counter (OTC) products, including cold medications. When used as directed, taking acetaminophen is generally safe and effective. But it can be harmful if itâs not taken correctly.
  Tylenol Extra Strength contains just acetaminophen, an analgesic for pain and fever relief. Tylenol PM contains both the acetaminophen and diphenhydramine. Diphenhydrami â¦ ne is an antihistamine that is used as a sleep aid to help you get to sleep.ylenol is   just a brand name (McNeil Labs) â¦ for acetaminophen. Acetaminophen is acetaminophen, whether it's brand name is Tylenol, Datril, Panadol, Valorin, or approx. 60 other brand names. The same goes for aspirin.