Often sold as an herbal supplement, Belladonna is a perennial herbaceous plant, whose leaves and roots are used to make medicine. Though widely regarded as unsafe, belladonna is taken by mouth as a sedative, to stop bronchial spasms in asthma and whooping cough, and as a cold and hay fever remedy. It is also used for Parkinson's disease, colic, inflammatory bowel disease, motion sickness, and as a painkiller. Considering the medicinal use of this product has not been approved by the FDA, Belladonna should not be used in place of medication prescribed for you by your doctor. Bear in mind that you should not use belladonna if you are allergic to it, or if you have narrow-angle glaucoma, enlarged prostate, severe ulcerative colitis or toxic megacolon, or if you have heart problems, especially when caused by a thyroid disorder. Do not give belladonna to a child without medical advice. In fact, this herbal supplement can cause serious side effects in babies or young children, including constipation, breathing problems, agitation, and seizures. In addition, you should not use this product if you are pregnant or breastfeeding. Bear in mind that Belladonna can cause dry mouth, blurred vision, muscle spasms, decreased urination, and decreased sweating.