What are the best tips to prevent yourself from feeling dizzy or passing out after a blood test?

Position. If you know that you are prone to passing out after a procedure like a blood draw, stick, exam or such, then request to lie down to have it done. Elevate your legs higher than the level of your heart and drink lots of liquids prior to the testing. Try to thing of other things and and take slow, easy and deep breaths but not more than 10-12 per minute. Some are just have to deal with it.
Lie flat. Lie flat before you are tested. Stay flat after the procedure until you are ready to get up. Let the venipuncture person know. Often the person who has the best physical conditioning (i.e., triathletes, varsity athletes) has the most vagal tone and gets woozy before anyone else, so it's no reason for embarrassment -- i'd be more worried about anyone who doesn't dislike having blood drawn.
Rest a while. You should stay seated or recumbent for a few minutes. Drinking water before hand to hydrate yourself may help too.
Prepare. Drink plenty of water and avoid dehydrating drinks like coffee. Ask the phlebotomist to explain the procedure well. If you need to be fasting, keep a candy in your pocket to suck on later. Rise slowly after the blood draw.

Related Questions

Hypothyroidism, my throat hurts + I'm feeling dizzy, is it possible that my blood test was wrong?

Anything is possible. And you can certainly repeat the blood test if you're concerned. Hypothyroidism can cause throat pain if associated with an episode of thyroid inflammation, but that generally resolves spontaneously. Check w/your doctor.

I had a blood test CBC 449 high platlets and stable, and have been feeling dizzy for 4 days, what does this mean?

Need more info. All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, high platelet count may be due to iron deficiency. You should discuss all of your blood test results with the doctor who ordered the test. Drink enough water so that your urine is colorless. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex.

Why do I get dizzy randomly? Lately I have been feeling dizzy, I try to eat healthy, sould I get a blood test?

Maybe. Lots of causes, but definetely need to get looked at ; blood test may show anemia or kidney failure that may be the cause, but too many causes to rule out ; please get looked at by an md.

Hi have been feeling dizzy, now I've got a rash come up all over my face and I have dirrehea I've been and had blood test but it's all clear?

Viral illness. Fortunately you do not have an headache. If fever, bad headache and vomiting you would need to see doctor sooner than later. Rest, fluids, otc tylenol (acetaminophen) probably all that is needed until clears. Vitamin c might help.

First time passed out having a blood test still feeling dizzy but also feeling sick and got headache. Also lost appetite the past few days and want sleep all the time. What could be causing this?

Need evaluation. Without further info/knowledge of health history, it's not possible to give individual diagnosis in this forum. General info: Fainting when getting blood drawn can be a "vasovagal" response: Blood pressure drops suddenly during emotional/physical stress. Headache/sleepiness can occur after. Although not usually a sign of serious illness if no health problems, deserves opinion from doc who knows you.

Dizziness almost everyday lightheadedness feeling like fainting it's been 6yrs. Head and neck MRIs, blood test, urinalysis were normal. What can it be?

EEG. Episodes of light hotheadedness are occasionally due to epilepsy and acephalgic migraine. In both cases the EEG is often abnormal (H response with photic flash and abnormal response to hyperventilation with acephalgic migraine with aura) Other reasons for "fainting" include dysautonmia due to neuropathy) No sure why an MRI was performed with your history) Did you see a neurologist? Six years?

I've got constant dizziness and tiredness and sometimes headaches, ringing in my ears. Had a blood test and it's clear. What could it be?

VERTIGO EVAL. Vertigo you need an exam and labs. Lab work up TFTS/VITD/B12/ Folate/LYME TITERS/ACEI LEVEL/. TX: antivert/me drop dose Pak. Also start low salt GF diet WholeApproach. Com. If symptoms persist then MRI of the brain is needed to define the anatomy.

I contracted Mono last year, now I'm having problems with dizziness and leg weakness. And my last blood test came back normal.

Likely unrelated. Years ago there was some talk about a chronic mono but the CDC has debunked that speculation. Your symptoms are very non-specific and could be related to dozens of differing diagnoses. I would work with your PCP over time to sort it out. Many of these take time to show their true form before they can be labeled and treated.