Phentermine and Increased Heart Rate: What Users Say (Page 3)

• lil...
• Taken for less than 1 month
• November 19, 2015

Phentermine for Weight Loss (Obesity/Overweight) "I started this medicine for weight loss. I have type 2 DM with PCOS. I started Adipex on 10/30/15. My weight was 260 lbs and I was very unhappy. My first week on this pill, I lost 10 lbs and the next week I weighed in at 245 lbs, 15 lbs in two weeks! It's amazing results. I had major side effects ranging from headaches, upset stomach, diarrhea, blankness, and heart racing. I stuck with it and the only thing I have a problem with is the diarrhea and upset stomach. I weigh myself tomorrow for the third week. The energy I have now is unbelievable. I'm really happy I chose this."

• lil...
• Taken for less than 1 month
• January 26, 2022

For Weight Loss (Obesity/Overweight) "Not worth it! I was literally one pound overweight and wanted to lose 10 lbs. For two to three weeks, I was a little energized and had a hard time falling asleep but really had no scary side effects at all. Then, at about three and a half weeks after beginning phentermine, I was awakened in the middle of the night sweating and with my heart racing out of control. My heart was beating so fast I couldn't get a number. It ended up being 204 bpm, which is crazy dangerous. I had to be given a heart medication to slow it down, and even then, it stayed at about 110 for three or four more hours. I was released to go home, and I felt just tired and drained the following day. I went to bed early and got up feeling normal. I obviously stopped using the phentermine, and my heart is at its normal 60-65 bpm. Doctors said I was lucky I didn't have a more dangerous arrhythmia or just collapse. Beware of this medication!"

• Spa...
• September 18, 2016

For Weight Loss (Obesity/Overweight) "I started phentermine on August 13, 2016. I did 1/2 pill for 7 days and then started with a whole pill thereafter. I do have issues falling asleep before 1 AM with no sleep aid. However, once I take my pill at 6 AM the following morning, I'm super energized anyway. The first week, I did get the midday crash. One day, I experienced a racing heart. Dry mouth daily until I drink at least 120 oz of water. I went for my follow-up appointment on September 13, 2016, and I lost 11 lbs. I have not been exercising, but I do move around more. I have had a partial hysterectomy, and I feel like it has affected my ability to lose weight. This month, I will be incorporating weights and home exercises."

• C-a...
• January 8, 2016

Phentermine for Weight Loss (Obesity/Overweight) "I made it through 3 days and discarded the bottle. I read the reviews and took the advice of most to only do a half pill. I am glad I did as the effects from just a half pill were enough to scare me. Within about 15 minutes, it felt like my heart was going to explode out of my chest. This lasted about 30 minutes, then it calmed down to a less fearful level. I felt pretty jittery and certainly like I was on 'something' for several hours. I took a 1/2 tablet twice a day, ate first to lessen the side effects. By day three, and again my heart just going nuts, and thinking how silly this will be if I have to go to the hospital, I said no more. Threw away the bottle. It will be easier to just not eat ice cream at midnight! :-)"

• Dea...
• Taken for less than 1 month
• June 13, 2016

For Weight Loss (Obesity/Overweight) "I am a mother of 3 with an office job and do not workout while taking this medicine. The reason I don't workout is because it increases your heart rate to the equivalent of what it would be if you were to go for a run. I'm no cardiologist or medical expert, but I don't feel like you should increase the heart rate beyond that point by actually working out. There is a certain heart rate that is unsafe based on age, height, weight, etc. Now that I've said that, I started taking this medicine on Thursday, June 9th, 2016. I weighed in this morning, June 13th, 2016, and I've lost 9 lbs in 4 days! That's awesome. I'm on a no-carb/low-carb diet, so every so often I take in some carbs, it's almost impossible to avoid them. I also drink nothing but water."

• Jha...
• Taken for less than 1 month
• March 21, 2018

Phentermine for Weight Loss (Obesity/Overweight) "Today is 3 weeks on Adipex. Symptoms have pretty much subsided, but at first, I was having trouble sleeping. I had a little bit of increased heart rate and random numbness in my arms and hands. I also still feel cold a lot, but nothing unmanageable. My start weight was 182 lb, I'm down to 168 lb. Goal weight is 130 lb. I've cut my calorie intake way down: no breads or sugars, no pop. The medicine does give me a really bad dry mouth, which is good for me because I want nothing but water and lots of it! I do still feel hungry on Adipex, which is good, but it's cut my cravings and my appetite, so I eat small portions of good, healthy meals and healthy snacks in between! I'm excited to see where I am at 8 weeks."

• Anonymous
• April 25, 2012

Phentermine for Weight Loss (Obesity/Overweight) "I started taking Adipex on 3/21/12. My starting weight was 271.5. Today is 4/25/12, and I weigh 258 lbs. I've lost a total of 13.5 lbs. I'm certain I could've lost WAY more. After over a month, I still have 1/2 a bottle left. The side effects of the pill (rapid heartbeat, dizziness from not eating, etc.) brought out my pre-existing anxiety issues. I stopped taking it for 2 weeks and got back to eating wrong, but I started again a little over a week ago, and I'm losing like CRAZY! I weigh every day, and the number keeps getting smaller (side effects are GONE). I sometimes skip a pill, but I still don't feel like I'm starving like I used to. I will continue to take it until I reach 145 lbs. I haven't exercised, but I did purchase the INSANITY workout and will start soon."

• Pen...
• Taken for 1 to 6 months
• August 18, 2019

For Weight Loss (Obesity/Overweight) "I started taking Adipex(P) - (Phentermine) about 6-7 weeks ago. The first 3-4 weeks I dropped the majority of my weight, 15 lbs. I took a week off (left it at home whilst on vacation) and gained back 5 lbs over the week because I was not following my diet at all. Even though I gained some weight back, I was eating noticeably less, which was the whole reason I started taking it. I am now back on track and back on the Adipex, and I’ve lost 7 lbs. I am 26, 5’0”, and starting weight was 202.5 lbs, wearing an 18 pants. The side effects for me were an ultra increase in energy, extreme dry mouth, and slightly higher heart rate for the first few days taking it. After about 4 days, the side effects were virtually gone. I will say that if you’re only taking Phentermine to drop weight fast, and not to train yourself for a major lifestyle change, you’re going to gain it all back. This is a tool, and as long as it’s used as such, it will work wonders."

• Msf...
• Taken for less than 1 month
• May 17, 2017

For Weight Loss (Obesity/Overweight) "I had a total thyroidectomy last September. From the surgery until now (5/17/17), I had gained another 30 lbs. Before my thyroid issues, my normal weight was 130-140. I have gained roughly 70-80 lbs since Feb 2016. I saw my endocrinologist last Wednesday (5/10/17), and they decided to start me on phentermine. I started the pills Friday (5/12/17), starting weight 216 lbs. I had to see my primary care doctor today (5/17/17), and I lost 4 lbs! I can't tell you how good it feels to jump on the scale and see that I lost instead of gained. Day 1, I experienced mild dizziness, dry mouth, heart racing. I drank a lot of water, and by the end of the day, I felt fine. If you can stick through your body adjusting to the medicine, this pill will work for you!"

• lov...
• October 1, 2018

For Weight Loss (Obesity/Overweight) "Last week I went to see my endocrinologist, and he sat with me and did a meal plan. He offered phentermine. I usually don't take drugs, but all the natural methods I tried didn’t work well. I took the medicine on Friday, 37.5 mg. On Thursday, I weighed in at 219 lbs. On Sunday, I weighed myself at home, and the scale said 212 lbs. I didn’t have any clothes on when I weighed myself. Was shocked only a couple of days have gone by. The pills give me a LOT of energy! It lasts all day and into the night. After I take them, I do laundry and clean and feel euphoric. All I want to do is be active. I cut out sugar since Thursday, and the meds make me feel really full, so I take a couple of bites of salad or a boiled egg, and I feel so full. It does give me dry mouth, so I drink more water. It makes my heart beat a little faster, but I hope this passes. So far, so good! I just have to make sure I measure my food when I go off the pills and continue to cut out processed foods, bad carbs, and sugar!"

• Tex...
• March 1, 2021

Phentermine for Weight Loss (Obesity/Overweight) "I took half of a pill, and the first time, I did experience my heart racing. It did, however, curb my appetite. When I would take half, I noticed the other half was a crumbly pill form. I’m not sure if anyone else has had this happen."

• Anonymous
• Taken for less than 1 month
• August 25, 2021

For Weight Loss (Obesity/Overweight) "I started phentermine 4 days ago and had a horrible experience. The first day I took a whole pill and had the jitters, racing heart rate, and just didn't feel good. The second day I took another whole pill, same thing. I have never had a problem with my blood pressure or heart. I was just standing doing my hair, and my heart rate was at 110. I felt lightheaded and just didn't feel good. I work out in the morning and sometimes at night. It kept me up all night and started making my legs and calves go numb and just ache at night. I told my doctor, and she told me to do half a pill, so the third day I did half a pill, and it wasn't bad. I had tremors, but it wasn't horrible. When I got in bed, the tremors got worse, and my calves were aching so bad. The fourth day, same thing. I told my doctor, and she said for me to get off of it, that that medication was not for me. Today is day 5. I have not taken it but am still having bad tremors. I would not recommend this medication because it is so hard on the heart."

• Cru...
• Taken for 1 to 6 months
• September 11, 2019

For Weight Loss (Obesity/Overweight) "I have shoulder problems, due to upper weight gain, on top of scoliosis. I went to my physician for help, and I was prescribed phentermine. I work in a physical environment, but I gain weight every year. I have attempted the gym and dieting, and I was stuck at an increasing weight. After one month, I lost at least 2 lbs. After three months, I'm down 12 lbs, with my current activity the same. The first month included an increase in heart rate, but normalized after. I am very happy to be at a healthy weight I haven't seen in 5 years."

• Ver...
• March 16, 2014

For Weight Loss (Obesity/Overweight) "I am taking phentermine 37.5, usually taking a full pill, but sometimes only taking half because of the way it makes me feel, especially at night. I have a hard time sleeping and have my heart pounds. Hoping these side effects will go away, but it has been a little less than a month, and I still experience them. I have already lost 22 lbs and hoping to lose the rest in another 2 months because my doctor said I can only take it for 3 months...if I keep losing like I have the first month, I will make it. I just wish I wasn't experiencing these side effects because sometimes they are really hard to deal with."

• 20l...
• Taken for 1 to 6 months
• July 12, 2019

For Weight Loss (Obesity/Overweight) "So I rated Phentermine about two months ago. The first month was great. I had more energy and lost 20 lbs, which is great because I gained a lot while pregnant. Well, the second month has NOT been the same at all. I was having some back pain and took some pain relief medicine. Then, when I went to bed, my heart started pounding. I shouldn’t have taken other medicine without the doctor's thumbs up, but it was horrible back pain. Anyway, the next day I was mostly back to normal. I stayed off Phentermine for two days, then started again. The first couple of days I was okay, then started having hot flashes, felt like my chest was getting tight, and some horrible cramps. I thought, well, maybe it’s my diet and not enough exercise, so I started changing it up. That didn’t help much."

• Anonymous
• Taken for less than 1 month
• July 1, 2016

For Weight Loss (Obesity/Overweight) "Ok, so I'm 5'5, 32 years old, and I weigh 151. I went to my PCP for a physical on 6/30/16 and was telling her that I can't seem to lose the last 10 pounds. She recommended that I take phentermine. She told me to take half a pill a day only and wants to see me in a month. Well, I decided to take my first pill the next day, 6/31/16. After breakfast, I waited two hours, but I took the whole pill just because I completely forgot I had to take 1/2. Anyways, after taking the first pill, 30 minutes later, I started experiencing dry mouth. Then I was hyper, jittery, then I could feel my heartbeat a little faster, then I got the chills, I was a little dizzy, and this is only after 1 pill. I was having all these symptoms for only 2 hours."

• Liz...
• February 10, 2017

Phentermine for Weight Loss (Obesity/Overweight) "I'm 19, female, 240 pounds, and 5'8". I started taking Adipex yesterday (02/10/2017), and I had a boost of energy for about 5 hours, along with constantly sweating, dizziness, no appetite. I had to force myself to eat, and my heart racing and blurry vision here and there. I sure do hope to see results because these side effects are pretty terrible. Any recommendations? I'm drinking lots of water and eating with the pill."

• Sas...
• Taken for less than 1 month
• September 24, 2018

Phentermine for Weight Loss (Obesity/Overweight) "My first time taking the Fastin pill was yesterday, and I was very scared. My heart started beating so fast and loud I could hear and feel it from my heart up to my throat pounding. I now see where everyone says you can cut it in half and try it from there, so I’m gonna try that and I’ll post results later on."

• Jea...
• January 3, 2018

Phentermine for Weight Loss (Obesity/Overweight) "I used Adipex for 3 months, lost 30 lbs the first 2 weeks. I had side effects of dizziness, sweating, insomnia, rapid heart rate, but I had a lot of energy, and the side effects only lasted 2 weeks. I cut back on going out to eat, and ate Lean Cuisine, drank only water or coffee with sweetener or unsweet tea. This pill is amazing, and I can't wait to go back on it again in 6 months! Cost was only $40.00."

• E73...
• November 17, 2016

For Weight Loss (Obesity/Overweight) "I started 10/31/16... I am down 9 lbs... I walk every day and eat okay... the key to your heart not racing... cut the pill in half... take 1 at 6 or when you wake up, the other at lunch. Do not take after 2 p.m."

• BGa...
• Taken for less than 1 month
• May 14, 2019

For Weight Loss (Obesity/Overweight) "Started the phentermine medication, and you do immediately experience less interest in food! Miracle. I needed to have become more informed because although I walk frequently, I want to drink enough water. Became a very dark feeling. Stopped it after two weeks, had lost about four pounds, 5'4", 170, yet also still held on to my habit of wanting to snack while reading and relaxing. Restarted today and will hydrate way more. Tomorrow, will take half of the normal dosing. Yes, heart rate went up by about ten beats per minute. Have low blood pressure, so that didn’t matter (well, other than additional strain on the heart?) As I continue taking phentermine, may even have a bowel motion only every other day. Absolutely been consuming more fruits and veggies and meat versus fried and white. Because truly, after I’m done with the prescription, I want these habits to stick."

• ky2...
• March 15, 2019

For Weight Loss (Obesity/Overweight) "I absolutely love phentermine, which I have taken for weight loss. I’ve taken it a total of 3 times. The first time, I had a few problems, though-racing heart and serious insomnia. Although I was taking the highest dose, I did lose ten lbs, though. The second time, I took 30 mg and lost another ten lbs in a month without exercise or dieting. This time, I’m really going to try hard to see if I can lose more! I’m 5’6 and currently 177 pounds."

• Bro...
• Taken for less than 1 month
• April 26, 2018

Phentermine for Weight Loss (Obesity/Overweight) "I took Adipex four years ago, and it was amazing. I lost 50 pounds and felt great! I started it back up this week because I got married and fell off the healthy food wagon. This time around, I've had headaches and a racing heart. I think I'm going to try taking my pill every other day and see if the side effects lighten up any."

• Gar...
• Taken for less than 1 month
• June 13, 2015

For Weight Loss (Obesity/Overweight) "I started taking the 37.5 mg dose 4 days ago. The first day, I felt very strange... heart racing, skin crawling, cotton mouth, and such. Since then, that has gone away. I have little appetite and have to remind myself to eat. I drink ample amounts of water. No soda or fast food. I have chosen to try this route instead of bariatric surgery. I suppose time will tell."

• Anonymous
• Taken for 1 to 6 months
• July 5, 2012

For Weight Loss (Obesity/Overweight) "I have been taking this for 2 months, and at first, I loved it. I lost 30 lbs in the 2 months, but then I started to get a lot of the severe side effects, such as a fast heart rate, dizziness, hard time breathing, chest pain, and insomnia. I really wish I didn't get these side effects, the pills were the best I have ever tried, but then it turned scary."