Estrogens, anabolic steroids, phenytoin, and thyroid medications may be discontinued prior to a thyroxine-binding globulin (TBG) test.
Certain foods--including bananas, avocados, cheese, coffee, tea, cocoa, beer, licorice, citrus fruit, vanilla, and Chianti--must be avoided for 48 hours prior to testing.
the person should eat and drink as normal, and take any medications that were stopped for the test.
Patients taking diuretics, antihypertensives, vasodilators, oral contraceptives, and licorice should discontinue use of these substances for two to four weeks before the test.
Steroids, propranolol (Inderal), cholestyramine (Questran), and other medications that may influence thyroid activity are usually stopped before a triiodothyronine (T3) test.
It is generally recommended to avoid taking medications before a fasting blood test, as it may affect the accuracy of the results. However, it is important to consult with your healthcare provider for specific instructions related to your medications prior to the test.
There are many medications that can affect the results of the platelet aggregation test. The patient should discontinue as many as possible beforehand.
Patients undergoing this test do not need to alter their diet, change their normal activities, or stop taking any medications. They will wear a surgical gown during the test, and be asked to urinate before the test starts.
This test requires a blood sample. The patient should have nothing to eat or drink (fasting ) from midnight the night before the test. Because lactic acid is produced by exertion, the patient should rest for at least one hour before the test.
Patients should not eat or drink for several hours before the exam. Many medications affect the esophagus; doses sometimes need to be adjusted or even stopped for a while. Patients must inform doctors of all medications taken.
No, fasting is not required for testing Creatine Kinase levels. However, certain activities such as vigorous exercise should be avoided before the test as they can temporarily elevate CK levels.
Before the test, the patient should discuss with the doctor whether it is necessary to temporarily discontinue any medications, and follow the doctor's orders. No changes in diet or activity are necessary.
No special preparations are needed for this test. It is not necessary to fast or to restrict medications before testing. Any blood that needs to be drawn for other tests should be taken before the radiopharmaceutical is injected.