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OsmoPrep® (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous)
(AhZ-MO-prep)
(sodium phosphate monobasic monohydrate, USP and sodium phosphate dibasic anhydrous, USP) Tablets

Read the Medication Guide that comes with OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) before you take it and each time you take it. This Medication Guide does not take the place of talking with your doctor about your medical condition or your treatment. If you have any questions about OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) , ask your doctor or pharmacist.

What is the most important information I should know about OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) ?

OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) can cause serious side effects, including:

Serious kidney problems. Rare, but serious kidney problems can happen in people who take medicines made with sodium phosphate, including OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) , to clean your colon before colonoscopy. These kidney problems can sometimes lead to kidney failure or the need for dialysis for a long time. These problems often happen within a few days, but sometimes may happen several months after taking OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) .

Conditions that can make you more at risk for having serious kidney problems with OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) include if you:

• lose too much body fluid (dehydration)
• have slow moving bowels
• have bowels blocked with stool (constipation)
• have severe stomach pain or bloating
• have any disease that causes bowel irritation (colitis)
• have kidney disease
• have heart failure
• take water pills or non-steroidal anti-inflammatory drugs (NSAIDS)

Your age may also affect your risk for having kidney problems with OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) .

Before you start taking OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) , tell your doctor if you:

• have kidney problems
• take any medicines for blood pressure, heart disease, or kidney disease

Severe fluid loss. People who take medicines that contain sodium phosphate can have severe loss of body fluid, with severe changes in body salts in the blood, and abnormal heart rhythms. These problems can lead to death.

Tell your doctor if you have any of these symptoms of loss of too much body fluid (dehydration) while taking OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) :

• vomiting
• dizziness
• urinating less often than normal
• headache

See “What are the possible side effects of OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) ?” for more information about side effects.

What is OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) ?

OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) is a prescription medicine used in adults 18 years and older, to clean your colon before a colonoscopy. OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) cleans your colon by causing you to have diarrhea. Cleaning your colon helps your doctor see the inside of your colon more clearly during the colonoscopy.

It is not known if OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) is safe and works in children under age 18.

Who should not take OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) ?

Do not take OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) if:

• you have had a kidney biopsy that shows you have kidney problems because of too much phosphate
• you are allergic to sodium phosphate salts or any of the ingredients in OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) . See the end of this Medication Guide for a list of ingredients in OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) .

What should I tell my doctor before taking OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) ?

Before taking OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) , tell your doctor about all of your medical conditions, including if you have:

• any of the medical conditions listed in the section “What is the most important information I should know about OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) ?”
• irritation of the bowel (colitis). OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) can cause symptoms of irritable bowel disease to flare-up.
• damage to your bowels
• problems with abnormal heart beat
• had a recent heart attack or have other heart problems
• symptoms of too much body fluid loss (dehydration) including vomiting, dizziness, urinating less often than normal, or headache
• had stomach surgery
• a history of seizures
• if you drink alcohol
• are on a low salt diet
• are pregnant. It is not known if OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) will harm your unborn baby.

Tell your doctor about all the medicines you take, including prescription and non-prescription medicines, vitamins, and herbal supplements. Any medicine that you take close to the time that you take OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) may not work as well. Especially tell your doctor if you take:

• water pills (diuretics)
• medicines for blood pressure or heart problems
• medicines for kidney damage
• medicines for pain, such as aspirin or a non-steroidal anti-inflammatory drug (NSAID)
• a medicine for seizures
• a laxative for constipation in the last 7 days. You should not take another medicine that contains sodium phosphate while you take OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) .

Ask your doctor if you are not sure if your medicine is listed above.

Know the medicines you take. Keep a list of your medicines to show your doctor or pharmacist when you get a new prescription.

How should I take OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) ?

• Take OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) exactly as prescribed by your doctor.
• It is important for you to drink clear liquids before, during, and after taking OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) . This may help prevent kidney damage. Examples of clear liquids are water, flavored water, lemonade (no pulp), ginger ale or apple juice. Do not drink any liquids colored purple or red.

You must read, understand, and follow these instructions to take OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) the right way:

On the evening before your colonoscopy, you will take a total of 20 OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) tablets, as follows:

1. Take 4 OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) tablets with 8 ounces of clear liquids.
2. Wait 15 minutes.
3. Take 4 more OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) tablets with 8 ounces of clear liquids.
4. Repeat steps 2 and 3 above, three more times. Make sure you wait 15 minutes after each time.

On the day of your colonoscopy you will take a total of 12 OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) tablets, starting about 3 to 5 hours before your colonoscopy, as follows:

1. Take 4 OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) tablets with 8 ounces of clear liquids.
2. Wait 15 minutes.
3. Take 4 more OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) tablets with 8 ounces of clear liquids.
4. Repeat steps 2 and 3 one more time.

Tell your doctor if you have any of these symptoms while taking OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) :

• vomiting, dizziness, or if you urinate less often than normal. These may be signs that you have lost too much fluid while taking OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) .
• trouble drinking clear fluids
• severe stomach cramping, bloating, nausea, or headache

If you take too much OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) , call your doctor or get medical help right away.

What should I avoid while taking OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) ?

• You should not take other laxatives or enemas made with sodium phosphate, while taking OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) .
• You should not use OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) if you have already used it in the last 7 days.

What are the possible side effects of OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) ?

OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) can cause serious side effects, including:

• See “What is the most important information I should know about OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) ?”
• Seizures or fainting (black-outs). People who take a medicine that contains sodium phosphate, such as OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) , can have seizures or faint (become unconscious) even if they have not had seizures before. Tell your doctor right away if you have a seizure or faint while taking OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) .
• Abnormal heart beat (arrhythmias)
• changes in your blood levels of calcium, phosphate, potassium, sodium

The most common side effects of OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) are:

• bloating
• stomach area (abdominal) pain
• nausea
• vomiting

These are not all the possible side effects of OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) . For more information, ask your doctor or pharmacist.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

How do I store OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) ?

• Store OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) at room temperature, between 59ºF to 86°F (15ºC to 30°C).
• Throw away any OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) that is not needed.
• Keep OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) and all medicines out of the reach of children.

General information about OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous)

Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) for a condition for which it was not prescribed. Do not give OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) to other people, even if they have the same symptoms that you have. It may harm them.

This Medication Guide summarizes the most important information about OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) . If you would like more information about OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) , talk with your doctor or pharmacist. You can ask your doctor or pharmacist for information that is written for healthcare professionals. For more information, call 1-866-669-7597 (toll-free) or go to www.Salix.com.

What are the ingredients in OsmoPrep (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) ?

Active ingredients: sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous

Inactive ingredients: polyethylene glycol 8000 and magnesium stearate

This Medication Guide has been approved by the U.S. Food and Drug Administration.

Last reviewed on RxList: 9/15/2009
This monograph has been modified to include the generic and brand name in many instances.