. infrequent and rare side effects of Cymbalta oral. Head Pain Less Severe;. Burning Stomach Severe; Common side effects of Cymbalta include: nausea, insomnia, hypersomnia. psychomotor agitation, agitation, abdominal pain, loss of libido, anorexia, decreased. Find a comprehensive guide to possible side effects including common. Our Cymbalta Side Effects Drug Center provides a. upper stomach pain. side effects and safety. (a condition that causes widespread pain). Duloxetine may improve. signs of liver problems (such as stomach/abdominal pain. Bipolar Disorder Medications: Side Effects From Cymbalta. Bipolar Disorder Medications: Side Effects From Cymbalta. Abdominal or stomach pain;. Abdominal pain; Yellowing of the eyes or skin Dark. Other common side effects of Cymbalta include tiredness, dizziness, insomnia, drowsiness. Duloxetine (Cymbalta) Side Effects & Withdrawal. Cymbalta (Duloxetine) Side Effects. Nausea, stomach pain, constipation, diarrhea, decreased appetite. Side Effects. Drug information. Abdominal or stomach pain area rash blindness. Duloxetine (Oral Route) Mayo Clinic Footer. Request Appointment; Give Now. Could Cymbalta cause Stomach pain? We studied 48,207 Cymbalta users who have side effects from FDA and social media. Among them, 1,051 have Stomach pain. See what we. • right upper abdominal pain. • Diabetic Peripheral Neuropathic Pain (DPNP). Cymbalta may cause serious side effects.