or diabetic ketoacidosis. do not take trulicity if you or a family member has had medullary thyroid cancer, if you've had multiple endocrine neoplasia syndrome type 2, or if you are allergic to trulicity. stop trulicity and call your doctor right away if you have symptoms such as itching, rash, or trouble breathing; a lump or swelling in your neck; or severe pain in your stomach area. serious side effects may include pancreatitis, which can be fatal. taking trulicity with a sulfonylurea or insulin increases your risk for low blood sugar. common side effects include nausea, diarrhea, vomiting, decreased appetite, and indigestion. some side effects can lead to dehydration, which may make existing kidney problems worse. with trulicity, i click to activate what's within me. if you want help improving your a1c and blood sugar numbers with a non-insulin option, click to activate your within. ask your doctor about once-weekly trulicity. click to activate your within. [ male announcer ] customink can help promote your business