Phentermine and Dizziness: What Users Say

• 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."

• jes...
• Taken for 1 to 6 months
• December 12, 2013

Phentermine for Weight Loss (Obesity/Overweight) "I started taking Adipex in Sept and went in on Dec 7th for my three-month check-in, and I lost 38 pounds. I am 5'8'' and began weighing in at 259, and now I'm down to 221, and this is without including exercise. Walking is part of my daily routine, I walk a lot throughout the day as I'm running between classes and then to go to work. I did experience some side effects the first week, like being lightheaded, dizziness, and a dry mouth. But I use that to increase my water intake. My doctor actually recommended I only take it about 5 days a week so that my body doesn't become so used to it, and that's what I have been doing. So far, so good, and I can't wait to continue losing weight."

• Anonymous
• September 14, 2008

Phentermine for Weight Loss (Obesity/Overweight) "I began taking Adipex in August 2008. I have been sticking to my doctor's weight loss plan of a 600-calorie per day diet. It has been 6 weeks, and I have lost 23 pounds. I feel so much better and plan to continue Adipex and my diet plan until I reach my goal weight. When first beginning Adipex, I had some trouble sleeping and found that I was dizzy often. Keeping some hard candy in my purse to eat when feeling dizzy seemed to help level out my blood sugar. After the first couple of weeks, sleeping and dizziness troubles went away. I feel that with the amount of weight I have already lost in a short amount of time, this drug is totally worth any and all of the side effects that I experienced."

• tra...
• Taken for less than 1 month
• February 22, 2016

Phentermine for Weight Loss (Obesity/Overweight) "I am a 42-year-old woman, 5'0" and weigh 232 lbs. I am way too short to be this heavy. Severe depression over the years brought me to this weight. Today is my first day on Adipex 37.5. I took 1/2 pill after having my morning smoothie. I am doing Dr. Oz Day Off Diet along with this. So far, so good. I only felt a bit of a head rush, but otherwise, the energy is perfect. I'm giving myself until January of next year to complete my full weight loss of 107 lbs. I will be walking every day as well. I will check in with updates every Monday. Hope I can help folks here as well."

• Mic...
• September 8, 2015

Phentermine for Weight Loss (Obesity/Overweight) "I tried Fastin for the first time today, which I purchased over the counter. Within 20 minutes, I experienced a slight euphoric feeling. After 30 minutes, however, my heart started racing, my body and hands began shaking, and I felt as though I was going to pass out when standing. I had to sit down until I felt in control. After 45-50 minutes, the shakiness and racing heart improved, as well as the dizziness when standing, but didn't disappear completely for over an hour. My mood still remained lifted. I may just be sensitive to the initial dosage, so I recommend that anyone sensitive to stimulant medications begin with a half dosage to minimize the initial negative effects until your body gets used to the drug."

• Aw4...
• May 5, 2016

Phentermine for Weight Loss (Obesity/Overweight) "I am 5'3, and when I started Adipex in late January, I was 202 lbs. Just now starting to slowly stop taking them by skipping days. I have had a total weight loss of 38 lbs in 3 months. The first month was the quickest results. I've eaten 1200 calories daily, drank water, and worked out extremely for 4-5 times a week. Experience headaches due to lack of water sometimes. I was dizzy when standing up too fast, had many sleepless nights from too much energy, even though my body was so tired. But I feel reborn. I feel so happy and confident. Of course, my body image isn't what I expected, but my journey has not ended yet. Adipex is a tool used to help change your lifestyle. I can't wait to say I changed my lifestyle and no longer need a pill, but I am thankful for it."

• Mrs...
• Taken for less than 1 month
• January 7, 2014

For Weight Loss (Obesity/Overweight) "I have been using Phentermine for the past week, and it works! I have already lost 7 lbs in 1 week with diet and exercise as well. In the beginning, I was very apprehensive about this. I have friends who have used it, and it also worked for them. I did experience a few side effects, such as dizziness, heart palpitations, and insomnia, but once my body got used to it, I felt fine. As a nurse, mother of two, and someone who juggles two jobs, Phentermine gave me the energy I needed. When I left work at 5 PM, I would pick up the kids, make dinner, do homework, and still have energy for an hour and a half, 5-6 days a week of exercise at the local 24/7 gym. So, thumbs up for Phentermine!"

• can...
• Taken for 1 to 2 years
• February 21, 2013

Phentermine for Weight Loss (Obesity/Overweight) "I have been on Adipex for almost two years. When they say it's not such a thing as a miracle pill, they haven't tried this. I lost 10 pounds from my goal of losing 150 pounds. My weight loss has slowed down a bit, but as long as the numbers go down and not up, I'm still happy. I did experience extremely dry mouth, dizziness, and loss of appetite for the first two months. BUT IT WAS WORTH EVERY BIT. Now I'm starting to have sleeping problems, which I don't like. I am very scared that if I stop taking it, I'm going to gain my weight back."

• Bra...
• February 19, 2017

For Weight Loss (Obesity/Overweight) "Started phentermine in September 2016. My starting weight was 248. I'm 5 ft 7 in and 37 years old. I am 5 months into phentermine, and my current weight as of 2/18/17 is 199. I feel that most reviews on here are from people who have recently started, so I could share my experience and give a longer perspective. I will be brutally honest, as I'm not looking to sugarcoat anything. The first week taking phentermine is horrible. You feel lightheaded, dizzy, memory loss, sweating, heart pounding, shortness of breath, energy, and other symptoms. However, after about a week, these symptoms stop. Stay with it. This will change your life with the right attitude."

• Sam...
• Taken for 1 to 6 months
• October 9, 2019

For Weight Loss (Obesity/Overweight) "I am a 20-year-old 5'2" female who started taking phentermine at 172 lbs. After taking phentermine for only 1 month and 1 week, I dropped all the way down to 141 lbs. I will say that phentermine really changed my life, but it caused severe side effects. My doctor recommended that I take it for 3 months, but I stopped at 1 month and 1 week because I was badly constipated and had chest pain, shortness of breath, and was extremely dizzy. I have been off of phentermine for one month and want to lose more weight, but I am afraid of phentermine."

• Aim...
• June 5, 2017

Phentermine for Weight Loss (Obesity/Overweight) "I work at an endocrinology clinic. And there, I have seen crazy stories about Adipex - from 191 lb in 1 year to 30 lb a month. So, I said to myself I'm going for it. In the first 3 days, I am 4 lb down. I have plenty of energy, I do have a dry mouth, and one time after I stood up from the bed I felt dizzy. Now, my post is more for the people who are taking it - please take 1200 cal per day. If you take less, you will have jitters, and you would start doubting the medication. And yes, I push myself to eat because I want to eat, but I eat small portions. From day one, I want to adjust my portions, always small portions. After 1 month after my medication finishes, I will continue small portions and won't exceed 1200 cal. Good luck."

• lib...
• Taken for less than 1 month
• March 11, 2016

Phentermine for Weight Loss (Obesity/Overweight) "I started this medication on 3/4/16. Starting weight was 208. After a week of taking it, I've lost 10 lbs. I weigh now, is 199. This pill works! I've been eating small snacks and working out. So far, the only problems I've experienced are dry mouth, dizziness, restlessness, and slight tremors for the first few days. I'll give an update in about a month."

• Dav...
• Taken for less than 1 month
• January 21, 2023

For Weight Loss (Obesity/Overweight) "I stopped taking after several doses. Terrible nervousness and anxiety. Difficult to concentrate at work and communicate thoughts clearly, insomnia, mouth and eyes constantly watering, angry feelings, depression, no desire to eat or do anything else. I get dizzy running on the treadmill. The doctor told me to take half a dose. It’s still terrible. After reading all the negative reviews with the same issues, I am throwing this in the garbage. FYI, I also am allergic to aspirin and have a similar reaction to Lipitor."

• Ski...
• January 29, 2020

For Weight Loss (Obesity/Overweight) "I have been on these phentermine for 4 months, 115 mg a day, amazing energy. I wanted to fit into my suit that I haven't worn in a while and see how far I could take this. Boy, did I take it far, basically way too thin for all my suits, and people at work and my wife call me skinny, and I've lost enough, they tell me. I don't even understand where they're coming from, as I haven't heard that my whole life. Sure, there are side effects, it affects your sleep, somewhat dry mouth, shaking, and sometimes I had dizziness before, but that's gone."

• Anonymous
• Taken for 1 to 6 months
• February 20, 2017

For Weight Loss (Obesity/Overweight) "I started this medicine on November 4, 2016. I weighed 286 pounds, stood 5'5'. This was the heaviest I have ever been. As of today, 2/20/17, I'm down to 194. I have more energy now than before. My cravings have changed so much. At the beginning, it was bad. Couldn't eat more than 2 or 3 french fries. No caffeine. Felt dizzy, light-headed, and just plain weird. That only lasted a week or two. I eat normal food, just so much less, and not the same rubbish I used to. Food does taste different, but it's for the better. I don't crave sweets or fried foods. I'm so happy with the way I am now and am still taking it."

• Amy...
• Taken for 1 to 6 months
• March 11, 2016

Phentermine for Weight Loss (Obesity/Overweight) "I was prescribed Phentermine by my psychiatrist because I gained 30 pounds on Saphris (which I use to help me sleep). I've been on Phentermine for over 3 months now, and I've already lost the 30 pounds and then some. I've gone down 2 pants sizes, with the only side effect being occasional dizziness, which is a small price to pay! I highly recommend it for rapid weight loss!"

• Xpe...
• Taken for 1 to 6 months
• June 25, 2017

For Weight Loss (Obesity/Overweight) "I have been taking phentermine 37.5 since May 12th, 2017. I am 5'5, and I started at 223 lbs. Today is June 25th, and now I weigh 201 lbs. So I have lost 22 lbs so far. My side effects in the beginning were dry mouth, and it literally felt like cotton was in my mouth, it was so dry! I believe I experience a bit of moodiness too from time to time. Also, I get really dizzy when standing up too quickly. I would definitely recommend getting in the habit of working out while taking the medicine because I have lost a good amount of weight, and I don't work out. I am a server, so I do stay on my feet, but I do no other extracurricular activities, so I know it is only the meds that are allowing me to lose weight, therefore, I need to start exercising now!"

• Anonymous
• Taken for 1 to 6 months
• March 18, 2015

Phentermine for Weight Loss (Obesity/Overweight) "I was personally not on this pill, but my mom was and currently still is. Though she has lost about 20 lbs in the last month or so, she has been experiencing side effects. First off, she's had severe headaches since starting the medicine. She's had extreme mood swings and is very nauseous and dizzy at times."

• Ste...
• December 4, 2019

For Weight Loss (Obesity/Overweight) "I am 54 years old and take 15 mg a day. Because it's like an amphetamine, it gives you amazing energy. From the moment you take a pill in the morning, I pop out of bed like I never have, and even if I have a bad night's sleep, I can work the night with lots of energy. It's like a dream come true. I don't work out whatsoever, and my suits at work are getting too big for me. I've been on it for about 2 months now, and I am at a weight which I haven't been at for many years. I feel muscles in my leg that were always covered by fat, I can now reach around to my back and scratch my back. Any downside to the pill, like sometimes not sleeping well, dry mouth, or even the new fidgeting of my mouth and tongue, which is really weird, is well worth it. I do have problems urinating, I think it has made my prostate enlarged somehow. I also do have dizziness if I bend and pick something up or exert myself doing something, and stand up, you have to be careful."

• Osc...
• August 14, 2013

For Weight Loss (Obesity/Overweight) "I'm a 54-year-old male, no medical issues except weight. I started phentermine on July 18, 2013, at 250 lbs. I weighed in today at 233 lbs. I've lost 17 lbs in 28 days. I've eaten mainly meat and vegetables, drank water only, lots of water. I exercise 3 times a week, cardio and weights for about 1 1/2 hours. The only side effects I've experienced are a dry mouth and occasional minor dizziness. I would highly recommend phentermine for anyone who is serious about losing weight."

• Anonymous
• Taken for 1 to 6 months
• September 25, 2021

Phentermine for Weight Loss (Obesity/Overweight) "I started Adipex on June 28th. It is Sept 25, and I am currently down 21 pounds! I started at 246 lb, now at 225 lb. I do light exercises at least 3 times a week, and I try to stay within 1500-1700 calories a day. The Adipex helps by curbing my appetite. I have experienced some dizziness if I don’t eat enough breakfast with it. It also causes dry mouth, so I would recommend always having a bottle of water around. I would say it has been immensely helpful as I am trying to form new healthy eating habits, more than I have been able to do on my own in the past. Best of luck to everyone trying to create a healthier life for themselves!"

• Tin...
• Taken for less than 1 month
• November 5, 2022

For Weight Loss (Obesity/Overweight) "Just started taking this weight loss prescription drug, and it works fabulously! Worst part is dry mouth and feeling like I need to brush my teeth excessively! My appetite is nearly gone, which allows me to choose wisely! I’m drinking safe amounts of water. I lost 10 lbs by the second week! I started at 37.5 mg and have experienced dizziness, taking deep breaths, and increased heart rate with activity, in which I’m monitoring my O2 saturation, which has remained stable at 98% with a resting pulse in the 80s. My BP has always been in the lower range, so no problem there. I’m compulsive about my smile, so I make sure to rinse my mouth out often. I’ve heard these symptoms calm down after a while. I took half a tablet today just to experiment, and my appetite is still little to nothing with fewer side effects. I suggest being mindful, for you know your body and what you can handle. So far, this is working great for me! Worst I could complain about is the dry mouth and insomnia."

• Sne...
• March 15, 2016

For Weight Loss (Obesity/Overweight) "I've been on phentermine 37.5 mg once daily for 9 weeks. The first week was rough: lots of headaches, irritability, with an easily evoked 'fight or flight' response. Although I will say that when I was feeling irritable and unreasonably mad, I was well aware of my behavior and knew it was a side effect of the med. I also have underlying mild anxiety/depression, which has gotten considerably more challenging on this med. I do take Zoloft 100 mg daily. All in all, between the weight loss and endorphins from exercising (30 min daily), it made it a lot easier to handle. For all of my time on this med, sleeping has been challenging. I have to wait a good 17-18 hours after taking the med before I can sleep. I tried taking half a pill, and it was totally ineffective. I have always been prone to dizzy spells when standing up quickly or squatting and standing: this med intensified that effect big time. But after 4-5 weeks, that side effect was much less. Dry mouth is also still very common. I don't mind as it encourages me to drink more water! All said and done, it's been 9 weeks, and I've gone down 37 lbs with little effort, and I still have zero appetite. I eat because I am supposed to, not because I am hungry. The effectiveness has only decreased around 15-16 hours after taking the pill. I am 31, starting weight 252. I am a huge fan of this med. The side effects are manageable and well worth the 37 lbs loss. Diet-wise, I'm doing low carb/low fat/low calorie. I go out to dinner 1-3 times a week and drink minimal to no alcohol. I did not have any spikes in blood pressure either. The initial stimulant effect went away quickly, I just feel like my normal self when I take it. The most important part of this med to me is that it takes away ALL my cravings. Yes, it destroys my appetite, but being hungry was never the reason I overindulged in the past. This med makes food indifferent, so I use it as I should: as fuel, not for pleasure. Also, you will get a prescription for 3 months as it is intended to be a short-term medication due to the side effects on your heart (read packet insert for details). If you have high blood pressure, you cannot take this. Feel free to ask any questions! I am in no way affiliated or endorsed by this med and have posted this review of my own accord."

• cur...
• Taken for less than 1 month
• July 8, 2013

For Weight Loss (Obesity/Overweight) "I've been on phentermine for 17 days now, and I started at 181 lbs. I weighed in at 168 lbs this morning. I'm still hungry while taking it, but I don't eat huge platefuls like I used to. Sometimes I eat very little, like 5 bites of food all day. I do not have increased energy, actually, I was quite tired the first week. The second week, insomnia. I actually stayed awake for over 24 hours one day last week. I'm 29 and haven't done that since I was a teen. No headaches or nausea. EXTREME dry mouth and diarrhea every other day, also, whenever I stand up, I have to do it slowly. I get dizzy every time and almost fall over. I work out 3 times a week to kickboxing, but that's about it, besides chasing my kids around."

• Bri...
• July 30, 2013

For Weight Loss (Obesity/Overweight) "I started my pill July 12, 2013, and I weighed myself the following Monday, July 15th. I lost 7 lbs, and I kept stepping on and off the scale because I didn't want to believe what I saw. I've currently lost 11 lbs in two weeks. I haven't lost anything this week. I work out 5 times a week and give myself the weekend for my muscles to recover. And I also force-feed myself. Sometimes I get bored and go workout some more after I get done with work. I get dry mouth every single day, and it gets annoying to me, actually. The first day I took my pill, I had a horrible headache. I sleep very well, surprisingly, because it does say one of the side effects is insomnia. I do get dizzy here and there in random spurts. But all in all, I love this pill."