Your blood can also be tested for:
Amylase, an enzyme produced by your pancreas. Amylase levels may be increased by (pancreatitis) inflammation of the pancreas or by certain types of drugs that affect your pancreas. If you use ddI, ddC, or pentamidine, your doctor will probably monitor amylase levels every month.
Creatinine phosphokinase (CPK), an enzyme usually found in muscles. When your muscle tissue is damaged or destroyed, the CPK enzyme leaks out into your blood. This test can show muscle damage due to wasting or drug side effects.
Erythrocyte sedimentation rate (ESR, Sed Rate), a test that measures how long it takes red blood cells (erythrocytes) from a sample of your blood to settle at the bottom of a test tube. A high ESR can indicate inflammation (swelling or other signs of infection). This test can’t identify a specific infection. However, you can monitor this test in the long term and, if there are any major changes, you should be looking for a possible infection.
Blood gases: Testing of blood gases is done only in a hospital, when you’re having extreme difficulty breathing. A sample of blood is removed from an artery in your wrist or groin (crotch), and the levels of oxygen, carbon dioxide, and bicarbonate are measured. The results of this test can help doctors measure how much oxygen to give you. Not enough oxygen can damage internal organs, and too much can destroy your lungs.