Nausea. Fe: Vomiting, bloating, abdominal discomfort/epigastric pain, black stools, diarrhea, constipation & anorexia; metallic taste; flatulence, GI irritation, heartburn, stomach discomfort; hemosiderosis (long-term administration of large amounts of Fe). Vit B
6: Sleepiness; headache, paresthesia; decreased serum folic acid conc, increased AST.