Anyone else’s lo take mirlax for an extended period of time and are okay?

My lo’s pediatrician prescribed her mirlax at her 18 month appointment and she’s been on it for 6 months now. I’ve heard all these things where it causes behavioral issues so I’m freaking out. I give her about 1-2 tablespoons per day with her milk. Anyone else’s lo been prescribed this and had any issues? Or were they okay? Obviously I’m stopping right now, but I couldn’t live with myself if I hurt my child with something that could’ve been prevented. I’ve noticed nothing different in her behavior and she’s been meeting all her milestones so I don’t know.