It is also sometimes called erythrocytosis, which means too many red blood cells. And it used to be called polycythaemia rubra vera or PCRV. PV is a type of rare blood disorder called a myeloproliferative neoplasm.These are conditions that cause an increase in the number of blood cells.t is also sometimes called erythrocytosis, which means too many red blood cells. And it used to be called polycythaemia rubra vera or PCRV. PV is a type of rare blood disorder called a myeloproliferative neoplasm.
Acetaminophen -- best known as Tylenol in the United States -- does not appear to help ease lower back pain and offers little relief for the most common form of arthritis, according to a new report.
We are not sure. Acetaminophen or Tylenol is great for headache, pain and fever reduction but does very little for inflammation. Tylenol falls under a broad category called no opioid analgesics. Other drugs included in this subclass include aspirin and non-steroidal anti-inflammatory drugs like ibuprofen, Naprosyn and Celebrex.