If you are using Urecholine with consultation from your doctor, then you should keep the fact in mind that he has weighed the pros and cons of the medicine before prescribing them to you. There are a few side effects of using Urecholine. You need to look out for the following and consult a doctor if they worsen: Dizziness, Feeling lightheaded, Nausea, Vomiting, Abdominal cramps, Diarrhea, Increased urination, Sweating, Flushing, Watery eyes, Headache, Fainting, Fast heartbeat, Severe abdominal pain, Trouble breathing Developing an allergic reaction to Urecholine is rare. However, if such a situation arises, get medical assistance immediately. If you notice anything other than the above-listed side effects, you should contact your physician.