Walk-in clinics treat small emergency situations that are not deadly. On-staff certified physicians supply qualified care to patients who are available in. These walk-in centers exist for convenience, when you can't wait to see your physic…

A toxicology test is used to check for drugs and other chemicals in the blood, saliva, or urine. In most cases, the testing is done on saliva or urine rather than the blood, because many drugs will show up in a saliva or urine sample. Plus…