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Mild sensations such as slight burning, tingling, or stinging might be experienced. These are generally not a cause for concern, but if they persist or worsen, it is important to consult a healthcare professional. Most users of this medication do not experience serious side effects, which should provide some reassurance.

However, there is a rare risk of a severe blood disorder known as methemoglobinemia, which can be potentially life-threatening. This condition is more likely in individuals with respiratory issues, certain blood disorders, or those who smoke. Symptoms can appear swiftly, from minutes to a few hours after use, and include pale or bluish skin, fatigue, shortness of breath, rapid heartbeat, dizziness, headache, or confusion. Immediate medical attention is crucial if these symptoms occur.

While a severe allergic reaction to this medication is uncommon, it is still important to be vigilant. Symptoms like rash, itching, swelling (particularly of the face, tongue, or throat), severe dizziness, and difficulty breathing require urgent medical care. This overview does not cover all potential side effects. If you experience any other unusual symptoms, seek advice from a healthcare provider.