Afraid of starting vits and constipation from iron! Vets????

Yes, it's okay to take Miralax.  In fact, I take anywhere from 1/2 to 1 dose each night and that keeps me straight.    I prefer it to the "colace" type medicines.  Plus, it's a powder (I use the Walmart "ClearLax" brand, so you can adjust your dosage as needed.