4 doctors agreed: Maybe not allergic: It's not unusual for pain medications such as morphine, demerol, or Dilaudid to be associated with some itching. They all can cause histamine release. This doesn't necessarily mean you are allergic to them. True allergy produces severe symptoms such as hives and trouble breathing. Sometimes Benadryl can help with itching. Or you can ask your doctor to try a different pain medication.
What is the most important electrolyte for the maintenance of osmotic pressure and volume in the extracellular fluid compartment? The most abundant positive ion or cation in the extracellular fluid  is sodium (Na+). Chloride (Cl-) is the most abundant negative ion  or anion.
Transcellular fluid is the portion of total body water contained within epithelial lined spaces. It is the smallest component of extracellular fluid, which also includes interstitial fluid and plasma.It is often not calculated as a fraction of the extracellular fluid, but it is about 2.5% of the total body water or 5% of extracellular fluid.Examples of this fluid are cerebrospinal fluid, ocular fluid and joint fluid.t is often not calculated as a fraction of the extracellular fluid, but it is about 2.5% of the total body water or 5% of extracellular fluid. Examples of this fluid are cerebrospinal fluid, ocular fluid and joint fluid.