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Experiencing nausea, vomiting, dizziness, stomach upset, or abdominal cramps can be common with this medication. These effects are generally mild, but if they persist or worsen, it's important to inform your healthcare provider. Most people taking this medication do not encounter serious issues.

However, be vigilant for any serious side effects. Contact your healthcare provider immediately if you experience symptoms of a severe infection, such as a persistent sore throat, high fever, or severe chills. Be alert for signs of a sudden decrease in red blood cells, which can include extreme fatigue, dark urine, pale lips, nails, or skin, and rapid heartbeat or breathing during normal activities. Another concern is a blood disorder known as methemoglobinemia; lookout for bluish skin or lips, headaches, shortness of breath, lightheadedness, weakness, confusion, chest pain, or a sudden rapid heartbeat.

Seek urgent medical attention if you have very severe side effects like a fast or irregular heartbeat, extreme dizziness, or fainting. An allergic reaction to this medication is rare, but if you notice symptoms such as rash, itching or swelling (especially of the face, tongue, or throat), severe dizziness, or difficulty breathing, get medical help right away.

This summary does not cover all possible side effects. If you notice any unusual symptoms not mentioned here, reach out to your healthcare provider for advice.