Both minor and major side effects may be experienced by users. Some of the lesser adverse reactions include heightened anxiety, increased nervousness, a feeling of numbness, diarrhea, constipation, dry mouth, sweating, skin rashes, tingling, stomach pains, vomiting, fever, or muscle spasms. The more serious side effects that should be reported to professional medical staff are as follows: fainting, confusion, painful or darkened urinating, jaundice, decreased heart rate, hallucinations, or bowel movements that have a clay coloring. Allergic reactions could also occur to some patients and will be characterized by the presence of breathing difficulties, hives, or swelling of the face and throat.