Side effects of this drug include dry mouth, dizziness, nausea, vomiting, constipation, etc. About half of the consumers report two or more side effects after use. It would be best if you take the pills twenty minutes before food. And the drugs should not be extended for more than the prescribed period. Doctors advise using this drug for three to six weeks, followed by a break period, and then the repetition to avoid the psychological addictive effects.