Hi. On Night Tour Of Duty. No On Call Docs

Hi. On night tour of duty. No on call docs unless emergency. Have question for patient. Take Miralax at home daily. Is on a nectar consistency and states, "was told I cannot have Miralax with nectars". I'm not sure why and if that is so. If true, ok. If false, I will text message the house doctor to put in an order.
So my question is, Is there any contradiction with Miralax and nectar liquids?
Thanks