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While taking this medication, you might experience some common side effects such as dizziness, trouble sleeping, nausea, or headache. These are usually mild and should not cause concern unless they persist or worsen, in which case you should inform your healthcare provider. Occasionally, you might notice an empty tablet shell in your stool; this is harmless as the medication has already been absorbed by your body.

In rare cases, you may experience serious side effects. Contact your healthcare provider immediately if you notice a fast, irregular, or pounding heartbeat, shaking (tremor), or experience mental or mood changes such as anxiety, confusion, nervousness, or restlessness. Difficulty urinating is also a sign to seek medical advice.

Severe side effects, though very rare, require urgent medical attention. These include seizures or signs of an allergic reaction, such as a rash, itching or swelling (particularly of the face, tongue, or throat), severe dizziness, or trouble breathing. This list does not cover all possible side effects. If you notice any other unusual symptoms, it’s important to contact your healthcare provider.

Avoid combining this medication with MAO inhibitors, as it can lead to a severe and potentially life-threatening interaction. MAO inhibitors include drugs like isocarboxazid, Linezolid, Metaxalone, methylene blue, moclobemide, phenelzine, procarbazine, Rasagiline, safinamide, Selegiline, and Tranylcypromine. It's important not to use most MAO inhibitors for at least two weeks before starting this medication. Consult your doctor to determine when it's safe to begin or stop this treatment.

Additionally, check all your medications, including cough and cold products, as they might contain similar ingredients, such as decongestants like phenylephrine. Your pharmacist can provide guidance on using these products safely.

Be aware that this medication might affect certain laboratory tests, such as allergy skin tests, potentially leading to inaccurate results. Inform all healthcare professionals and laboratory staff that you are taking this medication.