Omeprazole Side Effects: I was given omeprazole (20mg twice a day) for suspected stomach u http://www.medications.com/effect/view/40138 I was given omeprazole (20mg twice a day) for suspected stomach ulcers - though I was not experiencing current symptoms. Initially my stomach felt calmer but I felt very tired. Over the next few days I got more tired, weak and depressed. I completely los Hi, My sense of smell also went off ...and I guess the rest the Sat, 03 Oct 2009 12:12:09 -0400 http://www.medications.com/effect/view/40138?item=23391 Hi, My sense of smell also went off ...and I guess the rest the same as you but not as bad. I can't smell perfumes now... http://www.medications.com/effect/view/40138?item=23391