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You may experience some mild side effects such as nausea, vomiting, stomach ache, diarrhea, a metallic taste in your mouth, fever, headache, or acne. These are usually temporary and should not cause alarm. However, if they persist or worsen, it's important to seek advice from a healthcare professional.

There are some more serious side effects to be aware of. Contact a healthcare professional immediately if you experience burning sensations in your mouth or throat, sore teeth or gums, swelling inside the mouth, increased saliva, eye irritation or swollen eyelids, severe headaches, or swelling of the neck or throat (goiter). Additionally, signs of decreased thyroid function such as weight gain, cold intolerance, slow or irregular heartbeat, constipation, or unusual tiredness should be reported promptly. Also, watch for confusion or numbness, tingling, pain, or weakness in your hands or feet.

In rare cases, very serious side effects can occur, such as chest pain, black stools, vomit resembling coffee grounds, and bloody diarrhea. These require immediate medical attention. Furthermore, though a severe allergic reaction is rare, symptoms like rash, itching or swelling (particularly of the face, tongue, or throat), severe dizziness, trouble breathing, or fever with joint pain necessitate urgent medical care.

This summary does not cover all potential side effects. If you notice any other unusual symptoms, it is advisable to consult with a healthcare provider.