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Post-injection care is straightforward: Stay hydrated for the remainder of the day Avoid rubbing or massaging the injection site aggressively Apply a cold compress if swelling or soreness develops at the injection site Monitor for signs of allergic reaction (hives, difficulty breathing, dizziness) for at least 30 minutes Contact your provider or seek emergency care if you experience chest tightness, significant swelling, or breathing difficulty Strenuous exercise can resume the same day for most patients, though some prefer to wait until the following morning if injection-site soreness is noticeable

Youll need to see your GP to talk through your symptoms, and if they suspect a deficiency, theyll arrange a blood test

For the sake of simplicity, we will not go into further details here about this cycle

This also makes it the most effective way to treat a deficiency or prevent one in someone who may be prone