Someone experiencing serious side effects from omeprazole should consult his physician to discuss the severity of the side effects and to determine treatment options, as stated by WebMD. Individuals experiencing an allergic reaction to the medication should seek medical assistance immediately.
Omeprazole is a proton pump inhibitor, or PPI, that is used to alleviate symptoms that occur with stomach and esophagus discomfort such as acid reflux and indigestion, according to WebMD. The medication is also prescribed to relieve other symptoms that may occur from these conditions, including heartburn and trouble swallowing, by lowering the amount of acid in the stomach.
Serious side effects that should be evaluated by a physician include an irregular heartbeat, muscle spasms and seizures, states WebMD. These symptoms could be signs of low magnesium levels in the blood, though the likelihood of this occurring is low. Some individuals may develop a severe intestinal disorder known as Clostridium difficile-associated diarrhea, which causes severe diarrhea, abdominal pain, fever and blood in stools, but this side effect is rare. The most common symptoms reported are headache and abdominal pain.
Serious symptoms to an allergic reaction that require immediate medical attention include rash, swelling in the face, tongue and throat, and trouble breathing, as stated by WebMD. However, allergic reactions from this medication are rare, and most that do occur are mild.