Physicians may prescribe the brand-name drug Prilosec, known generically as omeprazole, for a variety of illnesses related to an excessive level of acid in the upper portion of the digestive system. People may find relief from such problems as ulcers, GERD or gastroesophageal reflux disease, Zollinger-Ellison syndrome, dyspepsia and bleeding in the digestive tract in patients who suffer from serious illness, MayoClinic.com reports. Doctors also may recommend the over-the-counter version of the medication for less severe cases.
Breathing Problems
The National Institutes of Health recommend seeking immediate help from a doctor if such side effects as difficulty breathing occur when a person takes Prilosec. The medication can cause the person to suffer shortness of breath or find it difficult to breathe in some other way, such as labored breathing. RxList.com states breathing difficulties occur far more often in children and teenagers who take Prilosec than in adults. The organization refers to clinic trials of Prilosec that reported 75 percent of children between infancy and younger than two years of age had respiratory problems, while 18.5 percent of those between the ages of two and 16 had them.
Seizures
People who take Prilosec may experience the serious side effect of having seizures, even if they never have had them previously. Seizures do not always mean convulsing or writhing on the floor while the body twists and jerks uncontrollably. Convulsions do classify as seizures, but seizures can include sudden and temporary disconnection with awareness as well. This can manifest as a person staring into space or phasing out during a discussion or other activity. Seizures, like all serious side effects of Prilosec require immediate medical attention, the National Institutes of Health recommend.
Muscle Problems
Serious side effects of omeprazole can affect the person's muscles, which may indicate a much more serious medical condition. The National Institutes of Health report cramps or spasms may occur in the muscles of the Prilosec user, as well as an aching sensation and muscle tightening.
Swelling
Any swelling that occurs when a person takes Prilosec can indicate serious health issues. The medication may induce swelling in the legs, ankles and feet, as well as in the eye areas, lips, tongue, throat and face. The person's hands also may swell. The National Institutes of Health recommends immediate medical consultation for any such problems.
Burning and Numbness
Prilosec also may induce burning sensations or tingling, a feeling often associated with numbness. These problems may occur in the feet and hands, or in the lips and tongue. Any of these need immediate medical aid.
