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- Lightheadedness upon standing is common. Donors are encouraged to rest for at least 15 minutes after the procedure while drinking water and eating a small snack. Some donors find they become nauseous after the procedure, but this should subside quickly.
- Pain and some bruising around the injection site is common. Pain should be mild, but it is normal for bruising to persist for several days.
- For a few days afterward, the loss of blood may induce dizziness or feelings of weakness when performing strenuous activity. Donors are advised to avoid physical exertion for 24 hours after the procedure, and to be cautious when exercising for the following week.