Cyproheptadine can cause a variety of side effects, ranging from mild to serious. Common side effects include:
- Drowsiness or sleepiness
- Dizziness
- Dry mouth, nose, or throat
- Constipation
- Blurred vision
- Feeling restless or excited, particularly in children
- Increased appetite or weight gain
- Excitability or nervousness
More serious side effects require immediate medical attention and may include:
- Severe allergic reactions (such as hives, swelling of the face, lips, tongue, or throat, breathing difficulties)
- Seizures or convulsions
- Confusion or hallucinations
- Little or no urination (possible sign of urinary retention)
- Fast or pounding heartbeats
- Easy bruising or bleeding
- Ring-like sounds in the ears (tinnitus)
- Pale or yellowed skin, dark urine, fever, or unusual tiredness (possible signs of liver problems)
- Muscle twitching, spasms, or uncontrolled movements
- Stomach pain, nausea or vomiting
- Weakness or a general feeling of being unwell
Some children may be more prone to irritability, unusual excitement, or insomnia; convulsions (seizures) are also reported more frequently in the pediatric population[1][3][5][7].
If any serious side effects occur, stop using cyproheptadine and consult a healthcare provider immediately. This is not an exhaustive list of side effects; always consult your doctor for medical advice about side effects.
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