If your patient has a history consistent with an IgE-mediated reaction to penicillin, then consider a penicillin skin test. Skin tests can be done when the patient is well and does not need an antibiotic. Then, if the patient becomes ill at a later time, a penicillin antibiotic can be used, if indicated.
A normal blood sugar level is between 72 mg/dL and 108 mg/dL (4 to 6 mmol/L) for a healthy person. The concentration of glucose in the blood of a healthy person in the morning on an empty stomach is between 68 mg/dL and 108 mg/dL (3.8 and 6.0 mmol/L).
When testing the blood we want to know the highest and lowest glucose readings for the day. The highest blood sugar reading should occur just before an injection of insulin is given. The lowest should occur at the time of peak insulin effect, usually five to eight hours after an insulin injection, which should have been determined during the initial regulation process. Therefore, the usual procedure for measuring blood glucose as an insulin-response curve is as follows: