Common Side Effects of Topamax:

Topamax has been studied thoroughly in clinical trials, in which a group of people taking the drug have side effects documented and compared to another group not taking the medicine. This way, it is possible to see what side effects occur, how often they appear, and how they compare to the group not taking the medicine.

The most common side effects of Topamax are:

Unusual sensations, like burning or tingling

Nervousness

Dizziness

Fatigue

Drowsiness

Mental and physical slowing or delay

Upper respiratory infection (such as the common cold)

Coordination problems

Weight loss

Loss of appetite

Taste changes

Confusion

Difficulty with concentration or attention

Nausea

Some other common side effects:

Diarrhea

Memory loss

Indigestion

Anxiety

Language or speech problems

Changes in gait  or walking

Sinus infection or irritation

Injury

Insomnia

Back pain

Dry mouth

Mood problems

Decreased sense of touch

Viral infections

Abdominal pain or stomach pain

Joint pain

Weakness

Sore throat

Mood problems