Along with its needing effects, a drug may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your family doctor immediately if any of the following side effects was happen
Rare
Collapse; difficulty in breathing or swallowing; hives; itching, especially of feet or hands; reddening of skin, especially around ears; swelling of eyes, face, or inside of nose; unusual tiredness or weaknessApproximately 7 to 14 days after you stop receiving box jellyfish antivenin, you may develop symptoms of serum sickness. The severity of the symptoms and the length of time the sickness lasts depends on the amount of box jellyfish antivenin you received and how long you received it. Check with your family doctor if you notice any of the following side effects:
Fever; redness of joints; skin rash and itching; swollen glands
More common side effects not listed above may also occur in some diseaseds. If you notice any other problems, check with your family doctor.