Phentermine and Anxiety: What Users Say

• tin...
• Taken for less than 1 month
• May 30, 2021

For Weight Loss (Obesity/Overweight) "Was just prescribed phentermine 37.5 mg on 5/25. I was nervous about side effects (jitteriness specifically) so the first three days I took half pills. No jitters, just a little more energetic and alert. I upped my dose to the whole tablet, which made me a bit more energetic but still not jittery. I just feel like getting up and being active/productive. But I do have to take it early in the morning or I won't be sleepy at night. It's only 5/30 now. In 5 days I have lost 9 pounds, from 327 lb to 318 lb. I know the drug isn't a long-term solution for better health. But it's a great jump-start and it's helping me break out of the cycle-- gain weight > feel crappy > lose motivation > gain more weight > repeat. I'm working to develop healthy habits for sustained health and continued weight loss when phentermine and I part ways."

• Ano...
• Taken for 1 to 6 months
• April 2, 2025

Phentermine for Weight Loss (Obesity/Overweight) "For years, I struggled to drop the extra weight I put on after having my second child. I tried everything from online programs to workout DVDs, but I always hit a plateau. When my doctor recommended Lomaira, I was honestly pretty skeptical. But two and a half months later, I’m down nearly 10 pounds, and it actually feels like it’s sticking this time. I started at 168 pounds, hoping to get down to 150. One 8 mg pill a day has seriously helped cut my late-night munchies and sugar cravings. Surprisingly, I haven’t felt jittery or had trouble sleeping, which was my biggest concern with a stimulant. Instead, I’ve got more energy, which is a huge help when you’re juggling kids and a busy schedule. I still have a bit more to lose, but I’m really happy with how far I’ve come. If you’ve been stuck in the same frustrating cycle, it might be worth talking to your healthcare provider about Lomaira. It’s done wonders for me, and I finally feel like I’m on the right track."

• Bug...
• June 3, 2020

For Weight Loss (Obesity/Overweight) "I just started taking 37.5 mg of Phentermine yesterday for weight loss. After struggling with diets, exercise and medication weight gain, my doctor and I decided this was the best way to help me shed the 10-20 pounds I’ve been wanting to lose for at least 6 months. First and foremost, take this pill as early as you can because it did affect my sleep. On the first day, I only experienced light jitteriness, a little chest pain, and a headache. My appetite was lessened. Today (the second day) I am already down a pound, I’m not very hungry at all, and I only have mild jitters and a headache. Nothing that isn’t tolerable though. I plan on taking this for a total of 3 months only, so I’m hoping I’ll drop the excess weight I’ve gained and develop healthier practices while I’m on it. I will say that the increased energy is nice for someone who wasn’t sleeping well and then wasn’t motivated to move around."

• hap...
• Taken for 1 to 6 months
• May 13, 2015

Phentermine for Weight Loss (Obesity/Overweight) "Fastin is an excellent dietary supplement for me. In the morning, right as I wake up, I take the little guy. The pill tastes like what I would imagine what baking soda would, but oh well, I am not sucking on it. It takes about 20-30 minutes to give the first kick. That kick is the rush that says 'I need to get moving or I need to get to the gym.' The first time I took the pill, I did get a little jittery and nauseous, but once I started working out and drank water, I started to feel fine. About an hour in, I hit phase 2. Phase 2 is the spunk and mood booster. I feel awesome and amazing like I know what I am working for. Again, the first day I felt a little dizzy and euphoric. Then there is phase 3, the come down. Drink water and eat a solid. I lost 100 lbs."

• Ele...
• Taken for 1 to 6 months
• November 24, 2013

Phentermine for Weight Loss (Obesity/Overweight) "I have been working out for the past year and a half. I've taken many kinds of diet pills, and let me tell you, this is by far the BEST thing. I've lost 35 lbs, and I feel wonderful. I do feel a little jittery, but I can handle that. It's great, and I hope it never goes away. Love it!"

• cwa...
• February 3, 2021

For Weight Loss (Obesity/Overweight) "I went to a weight loss clinic on January 4, 2021. The doctor put me on an old-fashioned low-fat diet and phentermine. Wow! I went from 218 lbs on January 4 to 210 lbs this morning. The dry mouth is lessening. No more jitters or anxiety. I really don't think about food. The doctor told me not to spend too much time in the gym because I am not training for athletics, and most people get into routines they will not sustain. He told me to walk a bit every day and to continue my yoga daily, even if for just 15 minutes. I take trazodone for sleeplessness. It's not a sleeping pill but an antidepressant. It doesn't have the harmful side effects of regular sleeping pills. When combined with melatonin, it really helps. I don't take phentermine every day. I think it accumulates in my system and keeps me awake unless I mix it up a bit. Some days I take half a dose, and today I took none. I believe I will sleep better tonight and still get the benefits of a reduced appetite."

• AGa...
• Taken for 1 to 6 months
• January 31, 2020

For Weight Loss (Obesity/Overweight) "I was prescribed phentermine as a way for me to boost losing the weight I had gained while on antidepressants. At the start of taking the medication, I must say I did feel a little shaky or jittery for about 1-2 days, but then all was fine. My energy was high and my hunger was suppressed. I even had to remind myself to eat! I was averaging losing 1 pound a day! I did incorporate moderate daily or every other day exercise and watched what I ate, and the weight kept coming right off! Within the first month, I had lost 16 pounds and dropped a pant size! I only took phentermine for three months and then stopped. In total, I lost 34 pounds and dropped two pant sizes. I absolutely recommend this as a short-term weight loss booster for anyone needing to lose some weight quickly."

• mzb...
• Taken for less than 1 month
• October 24, 2013

Phentermine for Weight Loss (Obesity/Overweight) "I have been taking Fastin for a little over two weeks. I started at 150, and I'm currently 140. Fastin causes me not to be hungry as much and gives me energy. I do feel a little jittery sometimes and have a funny taste in my mouth. Overall, I'm pleased with my weight loss and will continue using Fastin."

• BEL...
• Taken for 10 years or more
• March 1, 2020

For Weight Loss (Obesity/Overweight) "I had been taking this pill for almost 10 years. I lost the weight I wanted and kept it off, no caffeine. I did drink, it never bothered me. Two years ago, my new doctor took me off. I have gained 61 pounds back. I've talked to him about letting me try it again to rid myself of extra weight since I am so depressed because I can't even sit down and get up off the floor. So yes, it is a little jittery at first, but you shake that off by doing stuff like cleaning the house, which was my busy thing to do."

• she...
• August 30, 2013

Phentermine for Weight Loss (Obesity/Overweight) "I started taking Fastin a few days ago after I read so many good reviews. I must say that I did take the advice of so many others and started with half of the pill. It seemed to put me in the best mood and my energy level went through the roof. Not to mention, I wasn't hungry at all. Yes, it did make me feel a bit jittery so I drank a lot of water and had to pee quite often. Don't drink anything with caffeine in it while taking this because it makes you even more jittery. Plus, if you work in the heat, be careful because I felt like I was having hot flashes, but wow, it is definitely worth it. I lost a couple of pounds already. Well worth it for me."

• SMC...
• Taken for 1 to 6 months
• August 4, 2019

For Weight Loss (Obesity/Overweight) "I began taking phentermine on June 18th, 2019, with a starting weight of 295 lbs at 5’3”. During the first few days, I was very jittery and had trouble sleeping, however, after a week, I was able to adjust, and now the only side effect is dry mouth/thirst. I drink about 100 oz or more a day in water. I cut out all liquids holding calories and cut back on processed food while introducing more whole grains and fresh fruits and veggies. I have PCOS, so losing weight can be very difficult. I also started YAZ to help level my hormones while losing the weight. I began increasing my activity levels slowly by avoiding the elevator at work and utilizing the 5 flights of stairs several times a day (took 4 weeks to work up to this), and now I have begun using my tree climber at home in addition. It’s been 6 weeks, and I am down to 266 lbs, for a total of 29 lbs loss. Each week, I increase my activity and lessen my processed food. My goal is 150 lbs."

• Ano...
• January 29, 2021

For Weight Loss (Obesity/Overweight) "5'2", female, 28. Sedentary (desk job, gyms closed). Pre-existing PTSD, depression, and ulcerative colitis. 37.5 mg phentermine for 3 months. Doc did not stack it with fluoxetine or topamax as I'm already on 450 mg of Wellbutrin. After gaining 15 lbs in the first few months of COVID isolation, I decided to take this. Yes, I got the jitters for the first few days. Yes, it made me anxious for the first few days. Yes, my breathing pace and heart rate were up for the first few days. It went away. I didn't experience constipation per se, but I ate so little that bowel movements were few and far between. I took it between 6:30 am and 8:00 am every morning, otherwise I didn't get enough sleep. August 2020: 136 lbs, size 28/7 jeans, m/l shirts, 34B bra. November 2020: 112 lbs, size 23/3 jeans, xs/s shirts, 32C bra. This was combined with an Atkins variety keto diet, with 2 shakes and 1 big meal/day on most days. I kept my carbs under 20/day and struggled to eat 1200 calories."

• Anonymous
• Taken for 1 to 6 months
• February 19, 2022

For Weight Loss (Obesity/Overweight) "So I did keto, lost weight, but ended up gaining everything back and more when I started eating carbs and ended up obese. Then I was stuck, which was crazy because I’m the type that can get on track and lose weight when I put my mind to it. So I started phentermine at 5’5”, 177 pounds, the biggest I’ve ever been. I was scared at first because I have anxiety, and I heard it could make it worse, but I started taking it and the energy was amazing. It suppressed my appetite, but for the most part, I really just got full faster after a meal. The thing that surprised me: my mood was better. I loved it. After my first week, I was down 8 pounds. I worked out every day and ate low carb. The second week, the effect started going away, but I kept doing my routine, and by the end of the month, I was 20 pounds down, which put me in my healthy range. My second month was my last month. I only lost 7, but I was happy I got down to 150. I haven’t gained since I’ve been off, just losing. I’m now 139 :)"

• AsR...
• Taken for less than 1 month
• March 31, 2015

For Weight Loss (Obesity/Overweight) "First day of Adipex. My doctor wrote me a prescription for the full dose but advised me to start with half of a pill due to any anxiety I may have. I took the half pill this morning and boy, do I feel the energy. Hopefully, I can stay on the half strength, but I've been reading reviews that say the effects wear off after a few days. I'm a nurse, so I do like the extra energy. My starting weight is 215, ultimate goal is 165, but for now, getting under 200 would be great. Hopefully, I can use this extra energy to go to the gym. I'll keep everyone updated. I love reading everyone's weight loss stories. Good to know I'm not the only one who has weight loss as an issue. Best of luck to everyone. And stay hydrated."

• Y_M...
• December 5, 2007

For Weight Loss (Obesity/Overweight) "I first took phentermine after nursing my son for 2 years. I lost 28 pounds in 3 weeks. Yes, I know it's not healthy at all, but I couldn't eat no matter how hard I tried. I had too much energy. I was really anxious and nervous all the time. After 3 weeks, the medication no longer suppressed my appetite, but because I couldn't eat for the 3 weeks, my stomach had shrunk, and I've been able to maintain my 130-pound weight for 2 years."

• Y_M...
• December 5, 2007

For Weight Loss (Obesity/Overweight) "I first took phentermine after nursing my son for 2 years. I lost 28 pounds in 3 weeks. Yes, I know it's not healthy at all, but I couldn't eat no matter how hard I tried. I had too much energy. I was really anxious and nervous all the time. After 3 weeks, the medication no longer suppressed my appetite, but because I couldn't eat for the 3 weeks, my stomach had shrunk, and I've been able to maintain my 130-pound weight for 2 years."

• Che...
• Taken for less than 1 month
• October 24, 2014

Phentermine for Weight Loss (Obesity/Overweight) "I took this and it's the best thing I have ever tried. The first couple of days I went by the directions, then I doubled the dose. And I lost 20 pounds in 2 weeks. It did make me feel very jittery and my heart rate was going 90 to nothing, but I was determined to lose weight! And a little information, DO NOT, I repeat (DO NOT), take Fastin before you get in a tanning bed. Tan first, then take it. It made me very, very strange in a bad way. I'm no doctor but when I increased my dose, I had the shaking and the increased heart rate. But it never harmed me."

• Kai...
• Taken for 1 to 6 months
• March 10, 2016

Phentermine for Weight Loss (Obesity/Overweight) "I'm 5 ft nothing, weighed 155.4 when I started. I tried dieting, exercising, Weight Watchers, and kept gaining weight. I was prescribed Adipex on Nov 18th, 2015, and the pounds started falling off. I took the whole pill and felt anxious and shaky for about 3 hours, and after that, no bad symptoms. I took it for 2 months and lost 26 lbs. I stayed off for a month, and I didn't gain a single pound back. After a month off, I got back on, following instructions from the doctor when I first started, and by the first week, I lost 5 lbs. I have 10 days left, and I am at 118. My goal weight is 115. Adipex changed my life, and losing 30+ lbs in 3 months is amazing. I would recommend it to anyone! Also, it is not expensive at all, with or without insurance."

• Mad...
• December 21, 2016

Phentermine for Weight Loss (Obesity/Overweight) "It definitely helps with cravings and weight loss, however, if you have or do experience anxiety or depression already, this pill is not going to help. I did lose about 5-6 lbs the first couple of weeks, but I had to stop because it was making me a crazy person. I had the most horrible anxiety, and I just felt mean, upset, and sad, and it really affected my emotions negatively. Just be careful!"

• 1bi...
• April 10, 2013

Phentermine for Weight Loss (Obesity/Overweight) "I'm 5'3 and weigh 196 lbs, and I started taking Adipex on 4/5. On 4/8, I weighed 193 lbs. The first day, it made me very jittery and have dry mouth very bad. I have also walked on the treadmill for thirty minutes since I started the Adipex. I have lost a pound a day. It helps me to eat smaller portions. My goal weight is 150 lbs."

• Zor...
• Taken for less than 1 month
• September 15, 2021

Phentermine for Weight Loss (Obesity/Overweight) "I was always wary about weight loss pills due to the jittery effect they give you. I decided to try the Adipex-P, and it was the best decision I had ever made. It gives no anxiety or jitters, on the contrary, I felt relaxed. Not like a drug relaxed, it made me feel as if I had slept so well that I felt perfectly healthy. By the way, it had been many years since I felt that well. It just curbs the appetite, and you start cleaning and getting on with life, as one is supposed to do. I went from a whopping 400lbs to 165lbs in 1 year. I only used it for the first month, after that, my body took off on its own, but it was the perfect start."

• Tam...
• Taken for 1 to 6 months
• September 18, 2019

For Weight Loss (Obesity/Overweight) "I started on Phentermine in March 2019. I weighed around 270 lb with Type 2 diabetes. I had just gotten out of an abusive relationship of 15 years and raising 4 boys. I turned 50 in July and thought life was over. My first goal was to get down to 200 lbs. I am down to 199 lbs. I completely believe in the medicine as a jump starter. I cut out pop, I have one Coke Zero and the rest is water. I had never felt better with so much energy. I, like someone stated before, do feel if I miss a day of Phentermine, I have lots of depression and want to just sleep or eat. I am off the pills now and have lots of anxiety thinking about gaining that weight back. Not gonna let it happen!!! I did have to see my doctor once a month since I am Type 2 diabetic, but my organs were all fine and my A1C was lower than it had ever been."

• Bat...
• August 24, 2016

Phentermine for Weight Loss (Obesity/Overweight) "47-year-old male, 6'3", beginning weight in 2012 was 280. Before prescribing, my doc thoroughly checked for a healthy heart and cardiovascular system. If you have high blood pressure, abnormal heart rhythm, hypertension, etc., DO NOT TAKE THIS MEDICATION. Also, if you have anxiety or panic attacks, you may want to report those to your doctor before being prescribed Adipex. This medication requires a great deal of responsibility. It curbs your appetite so you can make lifestyle changes that are easier to maintain after you are off Adipex. This is August 2016, and I now weigh 205 and feel great. My waist size went from a 44 to a 36. When you stop Adipex, your energy level will drop, if it doesn't level off after 2 to 3 days, have your doctor check your thyroid again."

• Mat...
• Taken for 2 to 5 years
• October 9, 2019

Phentermine for Weight Loss (Obesity/Overweight) "I’ve been taking Fastin on and off for about 5 years. I always take half a pill in the morning and the second half in the afternoon. It definitely kills appetite cravings, and I have no desire for late-night snacking. Drink a lot of water. It can affect your mood. There have been days when I feel just so angry just by someone looking at me funny. It increases heart rate and gives a jittery feeling, but those side effects subside after a couple of weeks. It definitely works. I’ve lost 15 pounds in a month. Eat right and exercise and take this with precaution. I don’t recommend first-time users taking a whole pill. You will feel like you are having an anxiety attack."

• Mat...
• Taken for 2 to 5 years
• October 9, 2019

Phentermine for Weight Loss (Obesity/Overweight) "I’ve been taking Fastin on and off for about 5 years. I always take half a pill in the morning and the second half in the afternoon. It definitely kills appetite cravings, and I have no desire for late-night snacking. Drink a lot of water. It can affect your mood. There have been days when I feel just so angry just by someone looking at me funny. It increases heart rate and gives a jittery feeling, but those side effects subside after a couple of weeks. It definitely works. I’ve lost 15 pounds in a month. Eat right and exercise and take this with precaution. I don’t recommend first-time users taking a whole pill. You will feel like you are having an anxiety attack."