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Belviq XR and Fatigue: What Users Say

Fatigue: mentioned by 7 users (21.9%)

Based on user experiences from 32 Belviq XR 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.

headaches 28.1%
fatigue 21.9%
chills 18.8%
dizziness 18.8%
body aches 15.6%
tiredness 12.5%
brain fog 9.4%
dry mouth 9.4%
nausea 9.4%

Reviews for Belviq XR

Commonly mentioned side effects
  • Mor...
  • Taken for less than 1 month
  • June 22, 2018

For Weight Loss (Obesity/Overweight) "Well, I've been using Belviq XR for a week now. The first two days, I experienced dizziness and headaches, but by day four, I didn't have those symptoms. It definitely has suppressed my appetite, I find myself forcing myself to eat. Fatigue is a side effect, but I think the fatigue is attributed to the lack of caloric intake, especially since I exercise regularly. So, it's important to eat even if you have no appetite. So, in a week, I've lost five pounds so far, so good. :)"

8 / 10
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  • Sar...
  • June 20, 2018

For Weight Loss (Obesity/Overweight) "I'm 5'4" and 165 lbs, on thyroid meds, and have not been able to lose the weight from my last child. I took Qsymia a year ago and lost 15 lbs in 3 months, but the side effects were insomnia, which I've never had in my life, and dry mouth. Cost per month was nearly $300.00, not covered by insurance. I gained half the weight back and decided to try a different medication. Now on Belviq XR, my Dr. gave me a discount card, and it only costs $98.00 as opposed to $300.00. I have been taking it for 4 days and have lost 3 lbs! It has not curbed my eating, although I do feel that my appetite is suppressed. I have not had issues sleeping, but my muscles do feel sore, and I am a bit sluggish at times during the day. I have felt like I'm about to get a UTI for a few days now. I also had a few times standing up where I felt dizzy. Those are all the side effects I've experienced."

8 / 10
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13 Report
  • She...
  • May 14, 2019

For Weight Loss (Obesity/Overweight) "I am a 48-year-old female weighing 205 lbs (the most I have ever weighed in my life). My doctor recommended Belviq XR (20 mg) once daily, which he felt was a good option for me since I have high blood pressure. I am also doing WW in conjunction with the med. I began the med on 5/11, today is 5/14 (4 days on it today). On Day 1 and Day 2, I experienced extreme fatigue, mental fogginess, and a low-grade headache. On Day 3, those side effects subsided until I went to bed last night and woke up from what seemed to be hallucinogenic nightmares. It was so bizarre. My dreams were very vivid and lifelike, and I woke up several times during the night. I took Advil, and it stopped, and finally I could go back to sleep. To date, I lost 3 pounds in 4 days, so it seems to be working, but not sure if I can stay on Belviq with the side effects, the interruption of sleep, and nightmares. It is quite scary to experience. I am hoping it subsides."

6 / 10
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7 Report
  • Hap...
  • Taken for less than 1 month
  • March 4, 2019

For Weight Loss (Obesity/Overweight) "Like many, I had a bad experience with Belviq. First off, let me say I took this drug without food. After 5 hours later, I felt as if I voluntarily drugged myself, I experienced extreme fatigue, weakness, and a massive headache that lay up to 2 days. (It felt like I had a hangover, I could barely walk.) I took this drug on Wednesday, February 28, at 8:30 am. At that point, I knew I would throw away the drug. Then I decided to give the drug another try, but with food. This is when I discovered I am one of the people who have to take this with food and not on an empty stomach. What a big difference! No fatigue or weakness, no hangover feeling, and definitely no headaches. So I’m deciding to keep the drug because it did still curb my appetite, and I do want to add, though I experienced just wanting to rest and sleep, I was okay with that."

5 / 10
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7 Report
  • Dis...
  • Taken for less than 1 month
  • August 7, 2018

For Weight Loss (Obesity/Overweight) "I started Belviq XR 20 mg morning— Day 1 experience dizziness, fatigue, slight headache, and racing heart 96 resting / up to 108 with movement. Day 2 my symptoms were dizziness and slight headache. Seven days later—I continue to take the medication and the only symptom I have is dizziness. I contacted my dr because this medicine has not suppressed my appetite at all—so he is planning to switch me to something else."

3 / 10
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6 Report

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  • Tee...
  • Taken for less than 1 month
  • September 9, 2019

For Weight Loss (Obesity/Overweight) "I've taken Belviq XR for the last 5 nights. I had hoped any dizziness or other reactions would happen while I slept. I am noticing extreme fatigue, aching in my neck, lower back, and knees, and all over wobbliness. I haven't lost any weight yet, as I am too tired to exercise. The cost for 30 days was $315 with a coupon. Quite expensive to feel like rubbish and no weight loss."

3 / 10
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  • Hon...
  • Taken for less than 1 month
  • January 4, 2020

For Weight Loss (Obesity/Overweight) "I started taking Belviq on December 11 and stopped on December 22. While on the medication, I experienced dry eyes, brain fog, aches, fatigue, and after the first week, I seemed to not be able to control my bladder. The medication does reduce the appetite, however, the side effects of the medication were too harsh for me. $245 dollars, the remainder of the medication will stay in the bottle."

3 / 10
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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.