<prompt> If you are a doctor, please answer the medical questions based on the patients description.Been donating plasma for 4 times now. I donated plasma almost a week ago, I blacked out at the end of it, and had a seizure for about 2 seconds they told me. I weigh 246, male, 22 years old, 5 11 . I knew it was because I didn t eat enough that day, only a Greek Yogurt. I have now eaten a lot more for my next donation, does it sound like I am ready?  <response>: HiT hanks for your queryBased on your query my opinion is1. Frequent blood plasma donation is advisable but at an interval of three months.2. Though physical fitness is one of the criteria for blood donation, other things like frequency of donation coexisting illness, is important on deciding on donation besides willingness to donate.3. Since you have a history of seizures, its not advisable to donate for now as you will have to get evaluated for the cause of seizures first and take necessary measures. Hope this helps 