Effect of Acetaminophen on Postpartum Blood Pressure Control in Preeclampsia With Severe Features

Inclusion Criteria: * ability to give informed consent * diagnosis of a "severe" hypertensive disorder of pregnancy: * preeclampsia with severe features * chronic hypertension with superimposed preeclampsia with severe features * HELLP syndrome: hemolysis, elevated liver function tests, low platelets * eclampsia * not yet delivered or less than 6 hours after delivery Exclusion Criteria: * current incarceration * serum creatinine \> 1.0 mg/dL or suspicion of acute kidney injury * AST (aspartate aminotransferase) \>200 unit/L * ALT (alanine aminotransferase) \> 200 unit/L * known allergy or sensitivity to NSAIDs or acetaminophen * delivery \> 6 hours prior to enrollment * chronic kidney disease * chronic liver disease * prior liver transplant * chronic infectious hepatitis * gastritis * gastro-esophageal reflux disease (GERD) * peptic ulcer disease * bleeding disorder * provider feels that participation is not in the best interest of the patient