Dextromethorphan is an over-the-counter medication commonly used to alleviate cough symptoms associated with the flu or the common cold. This medication is an antitussive agent and should only be taken as directed. Before using this medication, patients should be aware of potential dextromethorphan side effects.
Upset Stomach
Treatment with dextromethorphan can cause upset stomach side effects in certain patients, Drugs.com health professionals warn. These stomach-related side effects are typically characterized by stomach pain, nausea or vomiting. Patients taking this medication can help limit upset stomach side effects by eating a small snack or meal prior to dosing.
Dizziness
Dizziness or lightheadedness may arise as side effects of dextromethorphan in treated patients, MedlinePlus medical experts explain. Episodes of dizziness can be uncomfortable and can cause affected patients to appear unstable while standing or walking. Certain patients can experience unusual sensations of nervousness or restlessness in conjunction with dizziness side effects. Affected patients should remain seated until such side effects pass in order to prevent further complications from tripping or falling down.
Drowsiness
After taking a dose of dextromethorphan, patients can become drowsy or fatigued, Drugs.com reports. Due to these potential side effects, patients should avoid taking dextromethorphan immediately before driving or participating in potentially hazardous activities until they know how this medication will affect them.
Abuse or Dependence
Patients who abuse or become dependent upon dextromethorphan can experience severe physical and psychological side effects, according to the Center for Substance Abuse Research at the University of Maryland. These effects can include decreased coordination, seizures, hallucinations, sweating, slurred speech, skin rash, increased heart rate, paranoia, hyperactivity or increased blood pressure. Patients can avoid developing these severe side effects of dextromethorphan by only taking this medication as indicated within the packaging material.
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