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Xenical and Diarrhea: What Users Say

Diarrhea: mentioned by 13 users (10.6%)

Based on user experiences from 123 Xenical reviews, the following table shows the most commonly mentioned side effects.

All user comments are moderated by Drugs.com. Each review is verified for relevance and screened for inappropriate content. Side effects are user-reported and not clinically verified.

diarrhea 10.6%
upset stomach 4.9%
gas 3.3%
headaches 3.3%

Reviews for Xenical

Commonly mentioned side effects
  • Des...
  • Taken for 6 months to 1 year
  • January 11, 2020

For Weight Loss (Obesity/Overweight) "Well, I started Xenical in March last year. I had a couple of months off it as I was having bowel problems. I went on my first cruise in November 2019 and I weighed in at 71 kgs. I was 91 kgs to begin with. However, I feel like it’s not working anymore as I can’t seem to shift those last 5 kgs. I’m also not having oily stools. Anyone experience the same?"

10 / 10
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114 Report
  • Axi...
  • May 4, 2016

For Weight Loss (Obesity/Overweight) "I started at 72 kgs., but after 6 DAYS of taking this pill, I lost 4 kgs!!! I am so happy about the progress and I hope this will continue. I am planning to take this for about 6 months so I can get back to my normal weight of 42 kgs - that was my normal weight before I gave birth. Hopefully, this amazing weight loss would continue. I am trying to avoid oily foods and I have been eating more green leafy vegetables. I think it's working well for me. I'm not being bothered by oily stools anymore since I've been eating less fat and more fiber. Never had any 'disturbance' at work as long as I avoid fatty foods at work."

10 / 10
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131 Report
  • hid...
  • December 21, 2011

For Weight Loss (Obesity/Overweight) "Well, just thought I would update you all. I left a comment on here last week. Had my first weigh-in yesterday and I have lost 11 pounds. Doctor has prescribed me these now for 2 more months and I have to have another review in 2 months' time. I'm so glad that these pills are working. My confidence has been given a real boost. Still suffering with loose stools but watching what I'm eating, but everything is moving in the right direction."

10 / 10
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152 Report

Frequently asked questions

  • Men...
  • April 15, 2016

For Weight Loss (Obesity/Overweight) "Ok, so it played nice with me. No side effects, nothing, well, until I had instant noodles. It's been three days, and I'm still running in and out of the toilet. I've literally been manufacturing oil in there, bright orange, it's disgusting. I'm never taking noodles for the rest of my life. As for my weight, I've lost 4kgs in a week. I feel great. Warning: stay away from oily foods. I learned the hard way."

10 / 10
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98 Report
  • big...
  • February 13, 2010

For Weight Loss (Obesity/Overweight) "Just over 4 weeks ago, I started taking Xenical that my doctor prescribed me. On the day I started, I weighed 23 stone 13 lbs, and now I am at 22 stone 5 lbs, so I have lost 21 lbs in just over 4 weeks! I was sensible enough to read online reviews and decided to make sure I eat as little fat as possible. When I'm hungry at lunch, I occasionally have an egg and bacon sandwich but cooked in no fat and using fry lite spray, cutting the fat off the meat. I have a sensible normal dinner and breakfast, sometimes toast with no butter and a banana inside or a couple slices of ham. I have cut out all the junk. Side effects for the first few days included slight tummy cramps and very occasionally a looser stool when going to the toilet, but no other side effects at all."

9 / 10
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139 Report

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  • Mar...
  • October 6, 2016

For Weight Loss (Obesity/Overweight) "This drug works but you need to be aware of the side effects. Though expensive (I'm in Australia, I don't know US prices), it's worth it as long as you eat and exercise properly. As it stops approximately 30% of the fat you digest from being broken down, you can lose fat-soluble vitamins. My pharmacist suggested using a multivitamin an hour before my first meal or 2 hours after breakfast so Xenical wouldn't stop the vitamins, though talk to someone before listening to this advice. If you eat anything with a high-fat content, you will probably poop your brains out. While visiting my dad, he made meat pies and I had burning diarrhea all night and the following morning. So don't do that, or if you choose to eat it, just skip the pill for that meal."

10 / 10
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77 Report
  • Spa...
  • Taken for less than 1 month
  • November 26, 2017

For Weight Loss (Obesity/Overweight) "I've been taking the drug for around 3 weeks, and the weight is literally flying off. What's more unusual is that I'm eating even more rubbish than I normally would: crisps, ice cream, chocolate, etc., and the weight is still coming off. Quite unbelievable. Yes, I'm having oily stools every day. They come out an orange color, and I'm going 2 or 3 times a day. But I can live with that. Apart from that, absolutely no side effects. None. I'm enjoying stepping on the scales every day. I can't wait to refine my diet so it is healthier and then see how much comes off. This is a miracle drug, and I can't believe I haven't tried it until now."

10 / 10
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65 Report
  • Ard...
  • July 24, 2010

For Weight Loss (Obesity/Overweight) "Metamucil may help side effects: I started taking Xenical 8 days ago and was quite nervous about the side effects, especially diarrhea because I have Irritable Bowel Syndrome. Because of this, I have spent much of my life running to the bathroom. 7 or 8 years ago one doctor recommended Metamucil and it changed my life. I now take it twice a day and perhaps this is why I am not having any problems with Xenical. It's worth a try anyway. In 8 days, I've lost 5 or 6 lbs so am quite happy."

9 / 10
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99 Report
  • Sss...
  • Taken for 1 to 6 months
  • February 28, 2018

For Weight Loss (Obesity/Overweight) "I put on a heap of weight after being incorrectly prescribed an anti-depressant. I have come off the anti-depressant but needed to lose the 20 kilos I put on while on it. Started taking Xenical around 6 months ago, take it most days and have lost 15-17 kilos. I'll take it for another 3 months to lose the rest and get back to my goal weight. Be careful of loose stools, but otherwise, it's great and has little side effects."

9 / 10
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48 Report
  • Pon...
  • Taken for 1 to 6 months
  • April 5, 2017

For Weight Loss (Obesity/Overweight) "I have been using Xenical for 40 days now, lost 18 lbs with minimum exercise. I wish it was a bit cheaper, because I paid $180 for 90 capsules, but the results are great, so I will continue taking it. I like that Xenical reduced my appetite, however, I need to stay home most of the time because I have loose stools almost every day. People say to eat a low-fat diet, but if you eat lots of salads and vegetables, you will still be using the washroom a lot."

9 / 10
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55 Report
  • Sam...
  • Taken for less than 1 month
  • October 10, 2018

For Weight Loss (Obesity/Overweight) "I started Xenical two days ago, and I've already lost 2 kilos. Yes, the side effects aren't the best, but I can live with them if this is the result. My pants are already loose on me! I have not experienced any side effects besides loose bowels and oily stools depending on what I eat. It is a little pricey, in Australia, it's about $97 a month, but it's early days, and I feel so much better. I am willing to pay the price!"

9 / 10
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40 Report
  • Sam...
  • Taken for less than 1 month
  • October 10, 2018

For Weight Loss (Obesity/Overweight) "I started Xenical two days ago, and I've already lost 2 kilos. Yes, the side effects aren't the best, but I can live with them if this is the result. My pants are already loose on me! I have not experienced any side effects besides loose bowels and oily stools depending on what I eat. It is a little pricey, in Australia, it's about $97 a month, but it's early days, and I feel so much better. I am willing to pay the price!"

9 / 10
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40 Report
  • But...
  • Taken for less than 1 month
  • July 2, 2017

For Weight Loss (Obesity/Overweight) "I've been taking Xenical for over a week now. I am on a low-fat, healthy diet, and I want to speed the process of losing a few more kilos before my summer holidays. Despite being on a healthy diet, I have to say that I've had oily stools and accidents. So far, no major weight loss."

5 / 10
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21 Report

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Reviews may be edited to correct grammar/spelling or remove inappropriate content. Reviews appearing to come from parties with a vested interest are not published. This information is not intended to endorse any medication and should not replace the expertise and judgment of healthcare professionals.