For Accu-Chek Guide. For testing glucose in fresh capillary whole blood. Fast, less than 4-second test. Fingertip, palm or upper arm testing.* Over-the-counter transactions only.** *Check with your healthcare professional before testing with blood from sites other than your fingertip. Refer to the AST information in the package insert. **Over the counter means transactions that do not require a prescription and/or are not covered by insurance. 25 test strips. Product Benefits.