Well I am on Prilosec too and it has never given me a bad taste. So I lean towards the Iron. Good luck!
Been living with Crohn's Disease for 33 years. Currently on Asacol, Prilosec, Estrace, Prinivil, Diltiazem, Percoset prn for pain, Zofran, Phenergan, Probiotics, and Calcium. Resections in 2002 and 2005. Also diagnosed with Fibromyalgia and Osteoarthritis. Currently my Crohns is in remission.