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Common Tramadol Side Effects
Tramadol has been studied thoroughly in clinical trials. In these studies, one group of people received the real medication, while another group was given a different pain medication. As a result, it is possible to see what side effects occurred, how often they appeared, and how they compared to the other medication.
In these studies, the most common side effects of tramadol included:
- Constipation -- in up to 46 percent of people
- Nausea -- up to 40 percent
- Dizziness or a spinning sensation (vertigo) -- up to 33 percent
- Headaches -- up to 32 percent
- Drowsiness -- up to 25 percent
- Vomiting -- up to 17 percent
- Nervousness, shakiness, agitation, or other "overstimulation" problems -- up to 14 percent.
Other common side effects (occurring in 1 to 13 percent of people) included but were not limited to:
- Indigestion or heartburn
- Dry mouth
- Hot flashes or flushing
- Coordination problems
- An unusual pleasant feeling (euphoria)
- Small, pinpoint pupils
- Sleeping problems
- Abdominal pain (stomach pain)
- Loss of appetite
- Vision problems
- Frequent urination or difficulty emptying the bladder fully
- Menopause symptoms.