Is it normal to be feeling faint this after a blood test?

For some. Most people do not feel faint after having blood drawn for a test and a small number react by fainting and reactions in-between. If you know that you feel faint after a blood draw, make sure to rest in a sitting or recumbent position for a few minutes before proceeding with your activities. Feeling faint may be your normal.

Related Questions

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 ? Read more...

Sudden dizziness, arms felt cold, nausea, and feeling faint, so went to ER. EKG normal, chest X-ray & brain CT & blood tests ok but low potassium. Sent home. Can Low potassium cause these symptoms?

Not too likely. Potassium usually needs to be pretty low to cause dizziness, and the ECG would be abnormal in that case. The question to be answered is, why is the potassium low? Meds? Diarrhea? Endocrine problems? Thorough history and good physical exam probably has the answer. Read more...
Not likely. Your symptoms & the rapidity with which everything seems to have come on speaks in favor of what we refer to as a VASOVAGAL reaction. For some reason you suddenly had a stimulation by the Vagus Nerve of your cardiovascular system which would've dropped your blood pressure & heart rate by a fair amount. Since you were sent home from the ER I'm sure your potassium wasn't THAT LOW to be of concern. Read more...