They need to know if you have any of these conditions:

Take this medicine by mouth with a glass of water. Take it on an empty stomach shortly before you eat a meal. Follow the directions on the prescription label. Take your doses at regular intervals. Do not take your medicine more often than directed.
Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.
Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.

If you miss a dose, take it as soon as you can. If it is less than four hours to your next dose, take only that dose and skip the missed dose. Do not take double or extra doses.

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

Diarrhea is a common side effect that usually happens in the first week of starting the medicine. This will usually last only a few days and will not come back. You should not start taking this medicine if you already have diarrhea or have diarrhea most of the time. Severe or prolonged diarrhea can lead to dehydration, a lack of fluids within your body. If you experience severe cramping, stomach pain, lightheadedness, dizziness or fainting accompanied by diarrhea, tell your doctor or health care professional immediately.
If you get new or worsening stomach pain with or without blood in your stools, call your doctor or health care professional right away.
This medicine may not work for all patients. It may take several weeks for you notice any relief from your symptoms. If this medicine is stopped, it is likely that that your symptoms will return within 1 to 2 weeks.
Your diet and stress levels may affect your course of therapy. If you eat something that seems make constipation worse or if you have significant levels of stress in your life, be sure to discuss this with your health care professional.

Side effects that you should report to your doctor or health care professional as soon as possible:

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

Keep out of the reach of children.
Store at room temperature between 15 and 30 degrees C (59 and 86 degree F). Protect from heat and moisture. Throw away any unused medicine after the expiration date.