Tell your doctor immediately if any of these rare but very serious side effects occur:
- slow/fast/irregular heartbeat
- signs of infection (e.g., fever, persistent sore throat)
- seizures
- shortness of breath
- stomach/abdominal pain
- black stools
- vomit that looks like coffee grounds
- easy bruising/bleeding
Seek immediate medical attention if any of these rare but very serious side effects occur:
- chest/jaw/left arm pain
For males, in the very unlikely event you have a painful or prolonged erection (priapism) lasting 4 or more hours, stop using this drug and seek immediate medical attention, or permanent problems could occur.
A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including:
- rash
- itching/swelling (especially of the face/tongue/throat)
- severe dizziness
- trouble breathing
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
Call your doctor for medical advice about side effects. In the US, you may report side effects to the Food and Drug Administration (FDA) at 1-800-FDA-1088.
In Canada, you may report side effects to Health Canada at 1-866-234-2345.
Desyrel Oral Medical Alert
Your condition can cause complications in a medical emergency. For information about enrolling in MedicAlert, call 1-800-854-1166 (USA) or 1-800-668-1507 (Canada).
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