In general, infectious syphilis refers to the primary and secondary stages because syphilitic chancres, mucous patches, and condylomata lata are highly infectious lesions. Dry rashes, by exception, are typically noninfectious.
It appears to reduce pain primarily in the central nervous system by more than one mechanism, possibly in part by inhibiting a form of COX known as COX-3, although this is the subject of much debate. It is, therefore, considered to be a weak analgesic and does not possess anti-inflammatory properties. What this means to you is that acetaminophen is great for headaches, fever and minor aches and pains, but wonât reduce inflammation due to, say, a muscle sprain.
What it Does. Tylenol is used for short-term pain relief for mild to moderate pain, and to temporarily reduce fever. You might consider taking this medication for back or neck pain due to muscle ache and/or arthritis. Even though acetaminophen is widely used, it may not relieve low back pain as well as you think.