According to the U.S. National Library of Medicine, Cymbalta (duloxetine) is an oral medication that doctors prescribe for the treatment of depression, generalized anxiety disorder, diabetic neuropathy and fibromyalgia. It is in the selective serotonin and norepinephrin reuptake inhibitor class of drugs. Cymbalta works by increasing the level of serotonin and norepinephrin in your brain. These important neurotransmitters stabilize your mood and promote mental balance.You should consult your doctor about serious side effects associated with the use of Cymbalta.
Suicidal Thoughts
Drugs.com warns that you may experience changes in behavior, emotional disturbance, or irritability while taking Cymbalta. If you are younger than 24, you may engage in suicidal thinking or have suicidal tendencies during the course of treatment. If you have problems with these side effects, you should contact your doctor immediately.
Liver Problems
According to Drugs.com, Cymbalta therapy may compromise the ability of your liver to function properly. Signs of liver problems may include dark urine, general fatigue and weakness, light-colored stools, nausea and vomiting, abdominal pain on the upper right side, and yellow eyes and skin. If you notice these symptoms, you should talk to your doctor without delay.
Blood Sugar Changes
If you are taking Cymbalta for diabetic neuropathy, you should be aware that it may cause changes in your blood sugar levels, says Drugs.com. If you see variations in your blood or urine sugar test results, you should consult your doctor.
Blurred Vision and Drowsiness
The Mayo Clinic states that drowsiness or blurred vision may be a problem for some people taking Cymbalta. You should get comfortable with the way Cymbalta will affect you before you drive, operate machinery, or engage in any other dangerous activities that require alertness and clear vision.
Lightheadedness upon Standing
During treatment with Cymbalta, you may feel lightheaded if you get out of bed too quickly or if you get up suddenly from a sitting position. To help control this problem, the Mayo Clinic recommends that you stand up slowly.
Bleeding Problems
According to Drugs.com, if you are taking nonsteroidal anti-inflammatory drugs such as aspirin, ibuprofen, and naproxen or blood thinners such as warfarin while you are on Cymbalta, you should consult with your doctor. The combination of Cymbalta and these other medications may lead to bleeding problems.



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