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Medications or Substances causing Hand tremors. Medications or substances causing Hand tremors. The following drugs, medications, substances or toxins are some of the possible causes of Hand tremors as a symptom. This list is incomplete and various other drugs or substances may cause your symptoms (see Hand tremors).
There are a couple different reasons for tremor in the hands. First, if your are fatigued, sometimes this comes out in the muscles as a tremor. It can be worsened by caffeine, such as coffee or soda. Fatigue alone as a cause of muscle shaking would be unusual just in the mornings, however, as one would think that that is when you would be at your least fatigued. A second cause would be essential tremor. This is a relatively benign neurological condition of unknown cause in which a part of the body (usually the hands) shakes, primarily when trying to perform an action as opposed to when at rest. Essential tremor is also worsened by caffeine, like a fatigue tremor. There are several medications which can be used effectively to decrease the severity of essential tremor. Other causes of tremor would be unlikely in a young man, but still need to be ruled out by your doctor.