Ectopic pregnancy (EP) refers to blastocyst implantation outside the uterine
endometrium. EP is major cause of maternal morbidity and mortality. Treatment
options include surgery, medical therapy with methotrexate, or expectant
management. Methotrexate is the primary regimen used in cases of early,
unruptured ectopic pregnancies. Most side effects of methotrexate are minor,
including nausea, vomiting, abdominal discomfort, and photosensitive skin
reaction. Serious side effects, including bone marrow suppression, and pulmonary
fibrosis, are invariably observed when methotrexate is administered in high
doses with frequent dosing intervals, in chemotherapeutic protocols for
malignancy. These side effects are uncommon with the doses used to treat ectopic
pregnancies. Since cases of methotrexate-induced pancreatitis are rare, we
report a case of pancreatitis in a patient with EP treated with methotrexate and
expect to consider pancreatitis as a side effect of methotrexate in a patient
with upper abdominal pain undergoing methotrexate chemotherapy.