Alkaloids obtained from the species of<unk> used in herbal medicines, which are used to synthetically prepare pseudoephedrine and<unk> ne, can cause cardiovascular events. These events have been associated with arrhythmias, palpitations, tachycardia and myocardial infarction. Caffeine consumption in combination with<unk> ne has been reported to increase the risk of these cardiovascular events.
Ephedra 
Milk Teeth
Leech
Pannus
Floater
Whitlow
Mersa
Datura