What is Miralax: Uses, Warnings & Interactions

Your doctor will tell you how much and how often to take this medicine. Do not take more medicine or take it more often than your doctor tells you to. 

When using MiraLAX without a prescription, follow the dosing instructions on the package. 

You can measure a single dose by the bottle top. Fill the cap level to the top.

If using packets, one packet is a single dose.

Take only one dose per day.

Doses can be taken at any time of day on a full or empty stomach.

Always dissolve the powder in four to eight ounces of water, juice, soda, coffee, or tea before swallowing it. 

Make sure the powder is fully dissolved before drinking it.

Do not drink it if powder clumps are floating on the top of the drink.

Unless prescribed by a healthcare provider, do not take MiraLAX doses for longer than 7 days.

Store MiraLAX at room temperature.

If you miss a dose or forget to take your medicine, take it immediately. If it’s the next day, skip the missed dose and take that day’s dose.

Never take two doses daily unless a doctor instructs you to.

You should not use this medicine if you have had an allergic reaction to polyethylene glycol.

Tell any doctor or other healthcare provider who treats you that you are using this medicine.

Before using MiraLAX, talk to a doctor if you have:

• Kidney disease

• Nausea, vomiting, or abdominal pain

• Irritable bowel syndrome

• Any sudden change in bowel movements that has persisted for longer than two weeks

Also, ask for medical advice first if you are pregnant or breastfeeding.

Don’t give MiraLAX to a child younger than 16 without first consulting with a pediatrician or other healthcare professional. 

Do not use MiraLAX for more than seven days. If constipation persists, seek medical advice.

You should stop using MiraLAX and call a doctor if you experience:

• Rectal bleeding

• Abdominal pain or cramping

• Nausea

• Bloating

• Diarrhea

To avoid possible drug interactions, tell any doctor treating you for a medical condition that you are using MiraLAX.

MiraLAX only has minor to moderate drug interactions. If you’re concerned about taking MiraLAX with other drugs, ask a doctor.