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Doctor insights on: Magnesium Citrate Bowel Prep Colonoscopy

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Does magnesium citrate for a bowel prep cause water retention? Or just help clean the bowel out?

Does magnesium citrate for a bowel prep cause water retention? Or just help clean the bowel out?

Magnesium Citrate: Magnesium citrate retains water in the intestines by osmosis. Increasing water in the bowel aids motility, usually producing a bowel movement within one-half to six hours. Magnesium Citrate does not cause water retention. ...Read more

Intestine (Definition)

The gastrointestinal tract starts at the mouth, travel down the tunnel (esophagus), which connects to the stomach, which then empties into the duodenum, jejunum, and ileum---the three parts of the small intestine (@25 feet). This empties into the colon or large intestine (about 5 feet), which then becomes the sigmoid colon, rectum and out the anus. So, every morsel eaten ...Read more


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Can i take magnesium citrate ontop of my miralax (polyethylene glycol) for bowel prep? 1 gallon of miralax (polyethylene glycol) is too much, can i only drink half a gallon?

Can i take magnesium citrate ontop of my miralax (polyethylene glycol) for bowel prep? 1 gallon of miralax (polyethylene glycol) is too much, can i only drink half a gallon?

Just mag citrate: You can have just magnesium citrate. Why are you having bowel prep. Discuss with your physician if mag citrate is a substitute that is satisfactory alternative. Tell him miralax (polyethylene glycol) volume is too much. However though discomfort it is do-able for most people ...Read more

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I took my colonoscopy prep 2 and a half hours ago I barely vomitted it up just now. I took 2 bottles of magnesium citrate. My test is 12:30 tomorrow afternoon what should I do?

I took my colonoscopy prep 2 and a half hours ago I barely vomitted it up just now. I took 2 bottles of magnesium citrate. My test is 12:30 tomorrow afternoon what should I do?

Wait for prep 2 work: The purpose of the liquid prep (which everyone agrees tastes really awful) is to clean out your colon so the dr using scope can see clearly during the exam. It is designed to cause successive bouts of diarrhea, until you can't go any more. If you only vomited up a little, it may still work as designed. If you don't experience results, call and reschedule the exam. They may give you a diff prep ...Read more

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Scheduled for colonoscopy but afraid magnesium citrate won't clear my colon. Docqulace and bisacodyl failed to evacuate colon. Will the citrate work?

Scheduled for colonoscopy but afraid magnesium citrate won't clear my colon. Docqulace and bisacodyl failed to evacuate colon. Will the citrate work?

AlwaysAGuess; agent,: dose & response relationships (with all the usual complex individual variables). A full bottle of citrate of magnesia will likely be far more effective than the other agents, especially if one stays physically active, fasts, take 2 days prior & chase with another bottle 1 day prior. Just keep up clear liquids. Awareness of heart beats both a focus & a self-distraction (from other greater) issues. ...Read more

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I tried a test run drinking a 10oz bottle of magnesium citrate. Will be having colonoscopy 9/13, now very nauseous.How can I prevent nausea next time?

I tried a test run drinking a 10oz bottle of magnesium citrate. Will be having colonoscopy 9/13, now very nauseous.How can I prevent nausea next time?

Mag Citrate: Several options: chill and drink slowly. Have hot coffee/tea before to get intestines simulated in the correct direction. Use MiraLAX (polyethylene glycol) the morning of and/or day before, again to get the tract flowing easily. ...Read more

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What is the minimum dose of magnesium citrate that I should take in order to have a smooth bowel movement?

What is the minimum dose of magnesium citrate that I should take in order to have a smooth bowel movement?

Depends: Everyone is different, so doses are individual. However, start with a small dose, and work your way up. Adjust to desired bowel movement. ...Read more

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No bowel movement after drinking magnesium citrate? Should I take more?

No bowel movement after drinking magnesium citrate? Should I take more?

Magnesium sulphate: It takes about 45 minutes to2to3 hours for it to start working, if it has been that long then you can drink more.It will work and you will go to bathroom again and again till your bowels are cleaned. ...Read more

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I've had no bowel movement after drinking magnesium citrate, should I take more?

I've had no bowel movement after drinking magnesium citrate, should I take more?

Depends: People are different, and onset of action can vary from 2-6 hours or so. If sufficient time has elapsed, you may consider taking more, but if constipation is severe, or if there is increasing pain or discomfort, you may need to seek medical attention. ...Read more

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3 weeks no bowel movement. Drank full bottle of magnesium citrate 24 hours ago and still nothing. What can I do?

3 weeks no bowel movement. Drank full bottle of magnesium citrate 24 hours ago and still nothing. What can I do?

Constipation: You need to see your doctor ASAP. He/she will likely test to determine if you have a blockage and help you fix it if one is there. This is a dangerous condition so please see doc now to be safe and to feel better. Peace and good health. ...Read more

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Is it safe to give my 7 year old son magnesium citrate if he has only had one bowel movement in 7 days?

Is it safe to give my 7 year old son magnesium citrate if he has only had one bowel movement in 7 days?

Constipation: depends on the dose, I would talk to his doctor to see. Also, you can push fluids, peaches, pears or prunes. Either eating the fruit or drinking the juice. ...Read more

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Ive had pain in my abdomen for more than 24 hours. I drank magnesium citrate and yes I've had bowel movements but I still feel severe pain andthrobbin?

Ive had pain in my abdomen for more than 24 hours. I drank magnesium citrate and yes I've had bowel movements but I still feel severe pain andthrobbin?

Got to see doc: Even though gas and abdominal cramping can cause severe pain, there are many other problems that may need to be addressed. Even with a BM your pain persists, means time to see a doc now. ...Read more

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All symptoms for past few days: pain in lower right back side, no bowel movement, clamy hot and cold, sweats, fever at night. Have taken magnesium citrate but no BM.

All symptoms for past few days: pain in lower right back side, no bowel movement, clamy hot and cold, sweats, fever at night.  Have taken magnesium citrate but no BM.

Try a few doses of: Milk of Magnesia (magnesium hydroxide). If no BM , you may have a fecal impaction requiring manual removal. This can be done in a minor emergency facility. They can also check you for this fever, which should be measured. Seek medical help in the next 24-48 hrs or immediately if symptoms become worse. ...Read more

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I drank magnesium citrate yesterday for severe acute constipation. It worked. Then I had the runs all day. But no bowel movement today . I'm worried.

I drank magnesium citrate yesterday for severe acute constipation.  It worked. Then I had the runs all day. But no bowel movement today . I'm worried.

May have cleared: Or u may have gone back to being constipated. If u are passing gas, this is a positive thing. Ways to avoid constipation are to Hydrate well, eat fibers-fruits and exercise regularly. Some people require daily prune juice or a stool softener like colace (docusate sodium) ...Read more

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Can I take magnesium citrate at 33 weeks pregnant? I have not had a bowel movement in over a week and I am experiencing pain from kidney stones

Can I take magnesium citrate at 33 weeks pregnant? I have not had a bowel movement in over a week and I am experiencing pain from kidney stones

NO!: Please ask you OB what to do. Strong Laxative can stimulate Uterine contraction along with Peristalsis and then premature Labor. You do not want to have Premature Delivery.
If you have Kidney stones, then you must be under Urologists care along with OB.
Drink lots of water and fluid until you talk to YOUR doctors. ...Read more

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What are alternatives for citrate of magnesium to cleanse the bowels before colonoscopy?

What are alternatives for citrate of magnesium to cleanse the bowels before colonoscopy?

Many: Most of the fda-approved bowel preps for a colonoscopy are actually prescriptions. There are no longer many otc versions of it. Discuss with your colonoscopist the benefits of each. ...Read more

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Was very constipated and bloated with very hard stomach took magnesium citrate and felt relief but minutes after still got very bloated with pain in left lower abdomen, what could this be?

Constipation: Magnesium citrate temporarily relaxes the smooth muscle in the large intestine and allows hard stool to start to move through it. The pain you might be feeling is still the hard stool pushing its way through. I would use an OTC medication like Miralax (polyethylene glycol) which draws extra water into the large intestine, increasing motility and making the stool softer as it passes through to the rectum. ...Read more

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Can the virtual colonography/colonoscopy be done withOUT the bowel prep?

Can the virtual colonography/colonoscopy be done withOUT the bowel prep?

No: Virtual colonoscopy requires the same preparation as conventional procedure. Consult this site for more information on this topic.
http://www.webmd.com/digestive-disorders/tc/virtual-colonoscopy-topic-overview ...Read more

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Is it absolutely essential that I drink all of the bowel prep before I have a colonoscopy?

Is it absolutely essential that I drink all of the bowel prep before I have a colonoscopy?

Yes: Yes so that your colon is clean enough. If you choose not to, the endoscopist may not be able to see everything' could potentially miss a lesion, and with an inadequate prep, i usually recommend that i repeat the scope much sooner than if i was comfortable i could see everything well. E.G repeat in 5 yrs instead of 10. ...Read more

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What is the best flavor of that drink for the bowel prep for colonoscopy?

Your choice: Colon lavage preps are designed to "wash through" the gut without being absorbed. As such, flavors used are restricted to sugar-free products (sugar promotes water absorption), & should avoid colors that stain the gut (red-colored preps are particularly troublesome when searching for bleeding sites). Commercial flavor choices: cherry, orange, wild berry, lemon-lime, pineapple, or no flavor added. ...Read more

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Drank 80% of my bowel prep for colonoscopy then eventually fell asleep. Will I still get to have it done?

Drank 80% of my bowel prep for colonoscopy then eventually fell asleep. Will I still get to have it done?

Give it a try: It may be too late for this answer, but you could have given yourself a fleet's enema in the morning to ensure a better colon preparation.
Wish you good health. ...Read more

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Am i allowed to take phergan during a bowel prep for a colonoscopy?

I wouldn't: Just take your time and drink the bowel prep -- it is very important to be cleaned out for the test. Try chewing gum in between glasses of the prep as this will take away the nasty aftertaste. Any medicine you take during the prep will likely be washed away ...Read more

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I vomited stuff for bowel prep and colonoscopy in 7 hours. Is that okay?

I vomited stuff for bowel prep and colonoscopy in 7 hours. Is that okay?

Probably: not a good thing. call your endoscopist and notify them as they may decide to cancel or suggest another prep to try to salvage the procedure. ...Read more

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Is there a pre-colonoscopy bowel prep that won't make me sit in the bathroom all night?

Is there a pre-colonoscopy bowel prep that won't make me sit in the bathroom all night?

That's the point: Unfortunately the goal of the prep is to completely clear your large intestines of fecal matter. And since there is only one exit.... Just remember why you are doing it. Good luck! ...Read more

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Doing bowel prep for colonoscopy/ged tomorrow. Only 24oz left to drink and bowel liquid isn't clear yet? Will this be a problem?

Doing bowel prep for colonoscopy/ged tomorrow. Only 24oz left to drink and bowel liquid isn't clear yet? Will this be a problem?

Keep drinking: Finish all liquid, and you will probably be ok. As long as the liquid is watery and without solids you should be ok. ...Read more

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I have a colonoscopy tomorrow. I took my bowel prep of about an hour ago. In how much time will it start working? Will a gatorade/miralax mix not work?

May not work: A gatorade and MiraLAX combination is not a common bowel prep in my experience. Miralax is an excellent laxative but if only one dose is taken, it is not likely to clean the colon out as well as is optimal for colonoscopy. A single dose might not produce a bm for a day or 2. Gatorade is an electrolyte-rich drink but not likely as effective as GoLytely or other polyethylene glycol solutions. ...Read more

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How to use Suprep Bowel Prep Kit for patient. Colonoscopy.

How to use Suprep Bowel Prep Kit for patient. Colonoscopy.

Here's helpful link: ...and video: http://www.suprepkit.com/dose-instruction.htm (in English and Spanish versions) ...Read more

Dr. Charles Cattano
2,044 doctors shared insights

Colonoscopy (Definition)

Colonoscopy is the procedure of using a long flexible camera to visualize the entire colon from the inside with the option to take pictures, video, perform biopsies, remove polyps, etc. Generally people are sedated and do ...Read more


Bowel Prep (Definition)

This is the flushing out of intestinal contents, usually before colonoscopy or colonic surgery. A solution which traverses the intestines without being absorbed is taken orally, causing a complete cleansing of solid ...Read more