Hi here are side effects of Omeprazole according to the NIH:
Some side effects can be serious. If you experience any of these symptoms, call your doctor immediately:
swelling of the face, throat, tongue, lips, eyes, hands, feet, ankles, or lower legs
difficulty breathing or swallowing
I have read in another place cholesterol can sometimes be helped by avoiding all animal products because these contain it and lowering sugars, and fats may help lower it also. Time in the sunshine may help convert the cholesterol to vitamin D and the artificial sources of vitamin D maybe aught to be avoided by someone who has a high cholesterol since cholesterol is converted into D by the body. If the D is already present the cholesterol might just collect without proper conversion.