Mounjaro and Fatigue: What Users Say

• Pam...
• Taken for 1 to 6 months
• April 11, 2023

For Weight Loss (Obesity/Overweight) "This medication was a life changer for me. I’m a 49-year-old female. I never had a problem with my weight until after the age of 45. Then during Covid, I gained 30 pounds and got up to 189. I was exercising regularly and trying to eat healthy, but could not lose any weight. I started Mounjaro and lost 12 pounds the first month. I had very little side effects. The only thing I experienced was fatigue, a slight headache, and I felt very cold. Once I became used to the medication, after a couple of months, those side effects diminished. I’ve been on the medication for 6 months and have lost a total of 56 pounds. I’m now at 133 pounds. My goal weight is 130. I feel better than I did when I was in my 20s and 30s. This medication was life-changing for me. It not only helped me to lose weight, but it also lowered my A1C, lowered my triglycerides, and blood pressure."

• 60y...
• March 22, 2023

For Weight Loss (Obesity/Overweight) "I have been on Mounjaro since Jan. 2023. I have lost 20 pounds. I need to lose 20 more. Side effects: burping, stomach upset, constipation, flu-like body aches, mildly depressed feeling, and fatigue. Not every day, not every symptom every day, and not all day. It comes and goes. I will continue but do wonder how it’s gonna go long term. I’m just sick of being fat."

• Hop...
• Taken for less than 1 month
• July 29, 2022

For Type 2 Diabetes "Started on 2.5 mg 3 weeks ago. I’m 5’2” and starting weight was 175.4, my highest was 180. I decided to try medication after my waist was 39 inches. After my 3rd injection, I am now 165 and lost 3 inches off my waist. This is with minimal exercise and mostly appetite suppression. Bacon and eggs that I have eaten faithfully as part of an attempt at the keto diet, I just can’t eat. Food is unappealing. I’ve struggled 2x this week to reach 1200 calories. That has never happened to me before. Side effects: indigestion, fatigue. Hoping this continues to work with minimal adverse events. I’ve been gaining/losing the same 3-5 pounds since my daughter’s birth 5 years ago. This makes sticking to a meal plan so much easier. My binge eating during “shark week” had gotten out of control. I’d like to add my kettlebell training back, hoping I get some energy back."

• Nop...
• Taken for less than 1 month
• September 15, 2022

For Type 2 Diabetes "Holy side effects. First, if you eat when you take it, it just sits in your stomach and you’ll be burping it for 12 hours. The headache is insane. Starts immediately. Then you are hit with 3 days of nausea, fatigue, and just overall fatigue. Just when you start to feel better, cue the insane heartburn! It took me 5 days to feel normal again. I’ll pass on this even though I lost 5 pounds the first week."

• SDG...
• Taken for less than 1 month
• September 21, 2022

For Type 2 Diabetes "I was prescribed the 2.5 dosage as a trial by my endocrinologist for pre-diabetic and weight loss on 9/15/22. I felt fine the first day, shot was given in the morning, but the next day I actually forgot to eat lunch. That is not normal for me. I wasn’t hungry. The third and fourth day I had horrible sulfur burps, nausea, fatigue. On the fourth day, I took two naps, which is not normal for me. I thought my symptoms were getting worse, but then the fifth and sixth day I felt great. I am fearful to take the next injection this week as I don’t want a repeat of the less than desirable side effects. It really wrecked my weekend. On the upside, I lost a couple of pounds the first week. That’s exciting, but at what cost?"

• She...
• Taken for 1 to 6 months
• March 11, 2025

For Weight Loss (Obesity/Overweight) "I started out one month ago on the lowest dose of 2.5. I could tell after a few weeks that my hunger had diminished a bit, and I felt a lot less bloated. By the 4th week, I was feeling extremely cold and fatigued and had lost 5 lbs. I just started this week on the next dosage of 5.0 and am hoping for more weight loss. I barely have an appetite, and nothing really sounds good to me other than apples. Thankfully, my glucose readings have come down, and I'm not needing as much insulin. I’m very hopeful that my A1C will be much better on my next labs."

• lif...
• Taken for 1 to 2 years
• May 23, 2024

For Type 2 Diabetes "It’s been 2 years. Yes, there were challenges. Some nausea. Lot’s of constipation. Some fatigue. And mostly good aversion. I understand fully the phrase eat to live. This medication was/is a game changer for long-time diabetes sufferers. I lost 50 pounds. Got off of insulin shots. Cholesterol meds. BP meds. I am over 60 years old and feel better than I did at 40. I would rate my experience on Mounjaro on a scale from 1-10, a solid 10. Everyone’s journey is unique, based on many different factors. I would rate my journey as successful."

• Wan...
• Taken for 1 to 6 months
• May 12, 2023

For Weight Loss (Obesity/Overweight) "I’m a 58-year-old woman. When I started Mounjaro, I was at 172 lbs. I am taking 5 mg. On the first injection of 5 mg, I had hives, but the next day, with allergy medication, it went away. I had a little bit of nausea off and on every time I took an injection. The worst part about this medicine is I feel cold all the time and fatigued. The fatigue goes away after a couple of days. I just took my 4th injection of 5 mg and will move up to 7.5 mg next week. So far, all good. I did notice I got pretty hungry 2 days before it was time to take my 4th 5 mg injection, which to me said it lost its effectiveness. I did struggle with those 2 days trying not to go back to old habits. I have lost 20 lbs since starting Mounjaro, and all of my blood work is much, much better. My A1C is down 2 points!"

• Lyn...
• Taken for 1 to 6 months
• October 15, 2022

For Type 2 Diabetes "Been on Mounjaro for 5 weeks for weight loss. Started with 2.5 the first month, now on 5 mg. Lost 20 lbs so far. Been on 5 mg for 5 days now and extremely fatigued and weak, however, I’m not going to complain because I’m not hungry at all. Have no desire for food since being on 5 mg. You have to make yourself eat and drink because you feel full constantly. Mouth is very dry, so drinking water regularly is a must. Highly recommend for weight loss. Hopefully, the fatigue will go away once I’m into the second week of the 5 mg and my body adjusts."

• PP6...
• Taken for less than 1 month
• November 22, 2022

For Type 2 Diabetes "Horrible experience taking this drug. I do not recommend taking this medication unless you want to die. I started taking 2.5 mg 6 days ago. Day 2 and 3 had no appetite and ate very little because the thought of food made me sick. Day 4 and 5 developed nausea, severe abdominal pain, and indigestion unrelieved by antacids. I also have lost five lbs because I am unable to eat or drink anything. I do not have any energy or feel like doing anything. Day 6 and I still feel sick. My fasting blood sugar this morning was 224 even though I am not eating or drinking hardly anything at all. It is noon, and I haven’t eaten anything because I’m afraid I will throw up. My heart rate is 120 and normally runs in the eighties. My doctor is out of the office this week for holidays. Just hoping and praying I don’t wind up in the emergency room. I will never inject this toxic stuff into my body again. I also read that it can cause thyroid cancer."

• Son...
• Taken for 1 to 6 months
• March 19, 2025

For Type 2 Diabetes "Started on 2.5 mg in December and have titrated up every 4 weeks to 12.5 mg currently. So far I have been losing 2-3 lbs a week and have lost 34 lb, and up until now I haven't really noted any serious side effects other than occasional constipation and slight nausea if I don't eat something small every few hours, or if I eat something really fatty. The last two titrations I have noticed some extreme fatigue and being cold on the first day after my shot, but then it usually starts to go away on the 2nd day and I feel better. I have also noticed that if I try to push through the tiredness and try exercising, I usually feel better. I have tried to stick to a 1200-1500 calorie diet and do eat a lot more fruits and veggies, and I feel better than I have in a long time. Overall, it’s been a good experience and I’m super excited to see how much more weight I can lose."

• mou...
• Taken for less than 1 month
• June 1, 2023

For Type 2 Diabetes "My husband suffered from severe nausea, mostly at night, but also from loss of appetite, constipation, and increased fatigue. He could not even get out of bed after one injection. He will not take a second dose."

• WVN...
• Taken for 1 to 6 months
• December 27, 2022

For Type 2 Diabetes "I started on the 2.5 dose in October, my doctor felt that the weight loss would help with my joint pain and lower my A1C. From day 1, I was extremely nauseous, had no desire to eat, had sulfur burps, and had constipation. I spoke with my doctor, who encouraged me to ride it out. On week four, I was stepped up to the 5 mg dosage. The doctor called in Zofran for stomach issues. On week six, I called her and said I could no longer function. During this time, I was so fatigued and was having heart palpitations and was barely able to walk 20 feet without being totally exhausted. I chalked it up to being so nauseous and not eating. Then my legs started to burn like I had walked up a steep hill and felt so sore and bruised I could barely sit. That week, I had my follow-up appointment with my doctor. I told her about my symptoms, and she said that rhabdomyolysis is not a side effect of Mounjaro. I was never dehydrated, but my CK levels were still 440 two weeks off the medication! Eight weeks later, and no improvement!"

• Kir...
• Taken for less than 1 month
• June 25, 2024

For Weight Loss (Obesity/Overweight) "Benefits: Completely stopped the food noise and cravings for fatty and sweet foods, decreased appetite within the first 2 days of injection. Injection not painful at all, tiny needle. Side effects: feelings of fatigue for 2 or 3 days after injection, can feel very bloated due to constipation. Feelings of a lump in the throat due to some acid reflux. Sometimes feel more emotional than normal. Increased periods, 2 periods within 1 month, very heavy and prolonged, appetite increased slightly on last 2 days before next injection due. Can feel shaky/weak if not eating enough calories due to decreased appetite. 1st month of use experience on 2.5 mg."

• Not...
• Taken for less than 1 month
• October 23, 2022

For Type 2 Diabetes "I’m struggling to get below 154 lbs, and being 5’, that’s a lot of weight to carry, which induces back pain. Lost 20 lbs on Ozempic from the beginning of the year till June, have managed to gain back 5 lbs, which isn’t awful but still not at my goal weight. I just left the ER from getting a bolus of saline due to dehydration. I’m battling hypoglycemia. I took my first shot on Tuesday. Wednesday felt decent, but malaise was setting in. Thursday, I didn’t even realize I had not eaten all day and all night at work. Friday night, I tried to eat half of a sandwich and was completely nauseous. Tonight at work, after eating half a sandwich and a few green beans, I had terrible diarrhea and became so dizzy and nauseated I was forced to leave work, having someone else take over my patients. Just a word of advice: if you’re a busy person, this med may not be for you. I had side effects of fever, chills, nausea, diarrhea, fatigue, and muscle pain, and I was negative for flu, COVID, and strep. The doctor said to go back to Ozempic :( but I’ve lost 6 lbs already!"

• Isa...
• Taken for 1 to 6 months
• June 7, 2023

For Type 2 Diabetes "Tracked daily side effects weekly for several weeks. Had the injection on Sunday. The cycle was repeated each week. If taken in the morning, I was unable to sleep that night. Changed to 2 hours before bed and slept, but woke up feeling exhausted. Developed headache/migraine and mind fog by mid-morning, with neck pain and stiffness. Fatigue, neck pain, mind fog, and migraine came in waves and lasted until late Wednesday. I began to feel better by Thursday and back to 'normal' by Friday. Only small impact on blood sugar numbers. Frequently hungry and craved carbs. No weight loss."

• Lad...
• Taken for 1 to 6 months
• February 14, 2023

For Type 2 Diabetes "Rx for weight loss, extreme fatigue for the first 3 days after injection (I stayed in bed). I thought it was good for controlling binge eating. However, I eventually started to get so dizzy after standing up that I had to hold the counters and walls to get around for the first few minutes after standing. I also started to notice a thickness or knot in my throat after the first 2 months. I had to stop taking it because no amount of weight loss is worse than being a cancer patient or bedbound. The weight loss was extremely slow for me too. I went from being on no meds to relying daily on heartburn medicine, Miralax, Tylenol, and ginger chews for nausea. And the price was ridiculous. I would have rather bought some cosmetic surgery. I was on it 5 months: 2.5, then 0.5, finally 7.5 mg."

• Anonymous
• Taken for less than 1 month
• January 12, 2025

For Type 2 Diabetes "Mounjaro has helped me bring down my A1C. I'm only on a relatively low dose, but I am experiencing troubling side effects: stomach pain, indigestion, nausea, fatigue. I have the side effects mostly a day or two after the injection. I noticed a slight weight loss at first, but I think I gained the weight back somehow."

• Ann...
• Taken for less than 1 month
• May 31, 2023

For Type 2 Diabetes "I am starting week three. As others have stated, it changed my relationship with food. I no longer focus or have cravings for salty and sweet, carbs, beginning day 3. No urge for late-night snacking. I can't eat carbs like potatoes or bread, or I get a stomach ache. A big improvement – I was so fatigued before, I could barely make it through the day, and now I have the energy to go into the pool and do some gentle exercising. I just don't get hungry. I was able to drop pop completely for water. I don't know what is in this medicine, but it really has made a profound impact on my life. I've lost 6 pounds so far, but it feels like I've lost a couple of inches in my clothes. Highly recommend."

• sve...
• Taken for 1 to 6 months
• March 1, 2023

For Weight Loss (Obesity/Overweight) "I have been taking Mounjaro for 4 months and have lost 20 lbs. I am currently taking 7.5 mg, and since I have been on this dosage, I have experienced nausea, stomach cramps, heartburn, and fatigue. I plan on lowering my dosage to maintain."

• Kat...
• Taken for less than 1 month
• May 15, 2023

For Weight Loss (Obesity/Overweight) "I started 2.5 mg of Mounjaro 5 days ago and have already lost 5 pounds. It makes me super thirsty, so I'm downing the water, which is a plus. I am not hungry at all and have to force myself to eat throughout the day. I am pre-diabetic with a fatty liver, so it's super important that I get my weight down for my health and happiness. I'm a 62-year-old woman, 5'11, 204 starting weight. As far as side effects, I'm not feeling any except I'm thirsty and don't have much energy. I know I'll feel better when I get down in size. I'm super excited about being thin again. I don't want anyone to see me at this weight, this weight gain has affected my life in so many ways. Fingers crossed it keeps working."

• Hon...
• Taken for 1 to 6 months
• October 6, 2022

"I have been taking Mounjaro for 7 weeks. 4 weeks of that I was on the 2.5 mg dose and lost 15 lbs by the 4th week. The last 3 weeks I've been on the 5 mg and I've lost ZERO lbs. Seems kind of useless to take when you have all the side effects (constipation, diarrhea, bloating, gas, nausea, headache, severe fatigue) for 3 weeks straight with no weight loss. I am considering going off this medication, I think it was all just hype. I've also stopped having periods. 40 years old, SW 199, CW 185, GW 140. Also following website food/calories recommendations. I have no other disease, just obesity."

• Joh...
• Taken for less than 1 month
• September 26, 2022

"I’m on 5 mg, and the good news is I am not hungry at all, as a matter of fact, the thought of food makes me sick. The bad news is get ready to feel sick all day, like nausea, upset stomach, dizziness, and extreme fatigue. Getting up in the morning, even after 8 hours of sleep, is a task."

• Chi...
• Taken for 6 months to 1 year
• June 15, 2023

For Weight Loss (Obesity/Overweight) "I have been on Mounjaro for almost a year. Started at 194 lbs, now averaging 145-150 lbs. In the beginning, I had the usual gastro effects - upset stomach, diarrhea, and no appetite even for water. Despite eating low calories, I lost slowly, about 1 lb a week. I had no energy to work out. If I tried staying on lower doses to minimize side effects, then the appetite would come back. After a few months, the gastro effects mostly went away, and I am left with sulfur burps, fatigue, irritability, and a general meh attitude about everything. I am someone who I would say has an addictive personality, and addiction runs in my family, and this drug works on your reward systems as well, so I’m not surprised it takes away my motivation. Despite the bad, it’s the only thing that has worked for me for weight loss. Currently, I take the injection every 14 days to minimize side effects and also to keep it affordable. Doing this keeps me at the weight I’m at, which I would like to be about 10 pounds less."

• Chi...
• Taken for 6 months to 1 year
• January 28, 2023

For Type 2 Diabetes "This medication works well for weight loss. I have been on it for 6 months and have lost 40 pounds, to where I am within 10 pounds of a normal weight. I’ve been on all of the doses. The gastro effects were very hard at first, but did go away. The more difficult and harder-to-tolerate side effects for me are increased heart rate and extreme fatigue, almost flu-like for 5 days after taking each shot. It makes me not want to get out of bed at all. It’s pretty close to depression. I’m trying to space out the medication to maintain my weight loss but not feel like I got run over by a truck all the time."