A pаtient tаking аmitriptyline fоr depressiоn is experiencing cоnstipation. The provider orders: Magnesium hydroxide 30 mL PO once nowAvailable: Magnesium hydroxide 400 mg/5 mLThe provider also specifies a maximum dose of 2 g per administration. How many grams of magnesium hydroxide will the patient receive, and is this dose safe? the dose is