Does anyone know, for a fact, whether or not allergy medicines like: Claritin-D are safe to take while on the low iodine diet? I have two days until my scan but my allergies are going crazy and I need a decongestant but I won't take anything without confirming it is safe. I've been on the LID for 3 weeks tomorrow and I don't want to take any chances of messing up my 6 month scan now.