Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
As per your complain the symptoms of itchy hands and feet along with redness or flushing of face and swelling or hives along with allergic angioedema seems to be due to
Allergic reaction as such symptoms are most common presentation of allergic reaction or
anaphylaxis..
In case if on both occasions when the symptoms appeared you have taken
Omeprazole the symptoms seems to be due to allergic reaction to Omeprazole that is a
Proton Pump Inhibitor..
I would suggest you to consult an Allergist and get evaluated and he can do a thorough clinical evaluation and also advise allergic tests like RAST test, Patch test, food challenge test to rule out the exact cause of the problem and treat you accordingly..
As of now you can take anti allergics like Allegra or benadryl..
The best way to prevent an allergic attack is to avoid exposure to allergen and in case if it is something that you come in contact with frequently you can be advised
Immunotherapy to reduce the severity of allergy symptoms..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora..