I am taking the following medications: citalopram 15mg, loratadine 10mg, microgestin fe 1/20, multivit/mineral supp, calc/mag/zinc. Do these drugs interact? Which can I take at the same time?

Iron and calcium. Iron and calcium should not be taken together as they impede absorption of each other. The rest are fine together.
No. I looked on a medication interaction checker and these do not appear to interact with each other. You can take then all at the same time or in any combination you choose.