Side Effects

Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

• Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
• Very bad dizziness or passing out.
• Trouble breathing, slow breathing, or shallow breathing.
• Fast, slow, or abnormal heartbeat.
• Feeling agitated.
• Feeling nervous and excitable.
• Headache.
• Call your doctor right away if you have any of these signs within 48 hours after getting dexmedetomidine: Change in thinking clearly and with logic, constipation, diarrhea, dizziness, salt cravings, stomach pain, sweating, weakness, or weight loss.