Fasting Is Not Required for Most Applicants

Unlike some medical procedures, the standard immigration medical examination does not require fasting. You do not need to skip breakfast or avoid eating before your appointment. In fact, arriving on an empty stomach can make you feel lightheaded or uncomfortable, particularly if a blood draw is part of your examination.

We recommend eating a normal, balanced meal before your appointment — something light and easy to digest, such as oatmeal, eggs, toast, or fruit. Avoid heavy, greasy, or unusually large meals immediately before your visit, as these can sometimes cause discomfort during the physical examination portion of the exam.

Blood Draw Considerations

Many immigration medical examinations include a blood draw for required serologic testing, such as syphilis (RPR) and HIV screening. If you know a blood draw is part of your appointment, staying well hydrated is especially important. Drinking plenty of water in the hours before your appointment makes your veins easier to access and can reduce discomfort during the draw.

Aim to drink at least 16 to 24 ounces of water in the two hours before your appointment. Avoid caffeinated beverages in excess, as caffeine can cause mild dehydration. If you have a history of difficult blood draws or fainting, let our clinical staff know when you arrive so they can take extra care.

There is no need to fast before a standard immigration blood draw. The tests ordered as part of the immigration medical examination — such as RPR and HIV — do not require a fasting blood sample. If your civil surgeon orders any additional tests that do require fasting, you will be notified in advance.

Staying Hydrated Throughout Your Appointment

Hydration matters beyond just the blood draw. The immigration medical examination can take one to two hours or more, depending on how many tests and vaccinations are required. Arriving well hydrated helps you feel more comfortable throughout the process and can reduce the likelihood of feeling faint after a blood draw or vaccination.

Bring a water bottle with you if you like. You are welcome to drink water during your appointment. If you feel lightheaded or unwell at any point, let our staff know immediately — we have protocols in place to ensure your comfort and safety.

Avoiding Alcohol Before Your Appointment

We recommend avoiding alcohol for at least 24 hours before your immigration medical examination. This is particularly important if you have a TB skin test (TST) read scheduled, as alcohol can cause mild skin flushing or inflammation that may complicate the interpretation of the test site.

Alcohol can also cause dehydration, which makes blood draws more difficult and can leave you feeling tired or unwell during the examination. There is no medical reason to drink alcohol before a medical appointment, and avoiding it helps ensure the most accurate results.

What to Eat for Comfort and Calm

If you tend to feel anxious before medical appointments, choosing calming, blood-sugar-stabilizing foods can help. Foods rich in complex carbohydrates and protein — such as whole-grain toast with peanut butter, yogurt with fruit, or a small bowl of oatmeal — provide steady energy without causing spikes or crashes in blood sugar.

Avoid sugary drinks, energy drinks, or large amounts of caffeine before your appointment. These can increase heart rate and anxiety, which may affect your blood pressure reading during the physical examination. A cup of coffee or tea is generally fine, but try to limit yourself to one serving.

If you have a medical condition such as diabetes that requires you to eat at specific times or in specific ways, follow your normal routine. Do not alter your diet or medication schedule for the immigration medical examination without consulting your physician.