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I started taking zantrex as directed on the bottle on Saturday. Severe insomnia immediately. By Sunday night I was throwing up. I will try a single pill twice a day tomorrow
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I was contemplating using zantrex 3 in hopes to loose a lot if weight before my holidays and for my health so I decided to weigh up the pros and cons first and researching the side effects, after reading these posts I am glad I haven't purchased any it has totally put me off buying zantrex I think I will persevere with my excersise bike, walking and good old fashioned healthy eating. I want a healthy lifestyle not a quick fix abc rhe satisfaction that i did it without a pill.Thanks for making me realize before hand it might take more time but I know I will be able to keep it off rather than reach for a tub of pills everytime I gain a few pounds.:)
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i have ben taking diet pills for a couple months now .  A mix of zantrex 3 and hydroxycut..ect...now from long term usage i have developed symptoms like nausa and vomiting.. i drink lots ofwater and followed all the instructions..i lost weight .but know i am scheduled for an ultasound because of stomach painsand vomiting ...
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Any kind of diet pill or supplement can cause digestive issues. It it really up to you to determine if the side-effects are worth it. Good luck...
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I just started taking zantrex and I have tons if energy, which is great, but I can't sleep?! Is anyone else feeling this too? I also feel like I'm hungrier than ever!!
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Hello did you gain the write weightbecause you stopped taking the pills ?
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Well In addition to increased appetite I also feel a crash in the middle of the day as if recovering from a caffeine overdose, and was surprised to find several forms of caffeine as ingredients in Zantrex-3; equaling the amount that would be in 3 or 4 cups of coffee
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This is my first day taking zantrex 3 and I can't stop going to the bathroom.. I took 2 at 5 am 30 mins before going to the gym and when I got home around 7 am I been using the bathroom. It's now 3 pm and im still feeling sick . I have even stop eating and I'm still running to the bathroom. Tomorrow I'm going to try and take 1 and see if I have the same problems
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I've been taking Zantrex 3 on and off for 3 months.  The first two days I took it I was seldom hungry and found myself restless often.  During those days I lost 3 pounds.  However, on the 3rd day I broke out in facial hives.  2 months later I got back on the pills and though I've noticed my loss of apetite and insane stomach pains.  It's only been two days, but I've lost around 5 pounds.  The amount of caffiene has made me extremely jittery and nervous.  I haven't been able to think properly or even function properly.  It takes all of my effort not to shake violently.  It also gives me gas and provides strange aftertastes.  I'm not sure if I will continue them after I reach my goal weight.  The side effects are a bit much even for me.
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Honestly i'm 18 & by the comments i've been reading i wouldn't start ANYTHING unless Zantrex 3 was cleared by my doctor . Call me nieve & maybe i'm still learning things but i wouldn't take anything that was make me feel any less better than before i started taking them . It's a good thing i stumbled on this page because i noticed majority of these posts are mostly cons to the pills . I think the only reason why some people have good results is due to how much your body can tolerate & NOT EVERYONE'S body type is EXACTLY the same . I was trying to lose at least 10lbs. before summertime but now i think i'll have to submit myself to working hard for it .... well Hello Gym , here i come . It might suck at first but i'm not risking LASTING side affects .:-|
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I started Zantrex-3 on 2/29/12! "Almost a week now" & I have already lost 6 pds!!! I only take two pills in the morning(7a.m.) & it lasts all day. Altough I do get stomach cramps I think its worth the try! Start weight-145. :-P Current weight-139! Trying for 125! I am 24 years old & 5'4. I ALSO EXCERCISE ATLEAST 30 MIN EVERYDAY & WATCH WHAT I EAT! Good luck everyone. Ill post back with updates
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I've been taking Zantrex-3 for about 2 weeks now and am over all pleased with the results so far. The energy boast was very noticeable during the first few days of use but has lessened since then, though I still get enough of a boost to do some light workouts (30 min on an exercise bike per day). I currently take 2 or 3 pills a day but never more then one at a time. Taking two at a time upsets my stomach but that is the only negative side effect I've experienced. I'm not entirely sure what I weighted before I started taking it but I'm 5'5 and down to 121lbs. My goal is 115lbs and I feel confident that I will reach this if I continue taking Zantrex-3.
I'm sure that this, like any pill, will have different results for everyone. I think that your current caffeine and calorie intake should be taken in account. If you drink a lot of caffeinated beverages like I did before my diet then your body has already built up a tolerance to it, my theory is that the the higher your caffeine tolerance is the less sever the side effects will be. I actually did a small test to see if this theory had any merit. Along with the bottle of Zantrex-3 I got for myself I also got a bottle for both my brother and step mother. Neither are in need of a weight loss supplement but agreed to try it mostly for the energy aspect. Since my step mother consumes only a small amount of caffeine while my brother drinks nothing but soda I thought they would be perfect for this test.
The results didn't surprise me. On the first day all three of us took 2 pills before breakfast. While my brother experienced nothing, not even an energy boost, both my step mother and I had slight nausea ans upset stomachs. We both decided to only take 1 twice a day in hopes of not experiencing those side effects again. Taking 1 twice a day worked great for me, I haven't had any kind of negative side effect since then. My step mother, on the other hand, continued to have stomach cramps and nausea so she stopped using it after 3 days. My brother continued using it for a week, 2 pills 2x a day and never had a negative side effect. He lost 4lbs but stopped taking since he's already at a healthy weight. 
I'm not claiming this to be a scientific study or anything I thought I'd just let everyone know what I observed. I also find that eating doesn't make a difference for me personally, I've taken the pill on an empty stomach and still didn't experience any stomach aches.
I hope I helped, Good luck with your weight loss everyone!
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Im 15 and have been takin Zantrex 3 for about 6 days and i feel fine and i have lost 5 pounds so far. i havent experinced any stomach problems and i find myself gettin fuller faster. However , i do BURP!
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green tea is very good for diet n ur digest system :)
i always take it in every morning n dinner . i want try zantrex 3 product but i scared . n now i just take the green tea every day n just diet as usual . :)
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I had been taking zantrex 3 and in the mornings and sometimes throughout the day w was having diarrhea.I was jittery and flet nausea. I stopped taking it and I gained my weight back.I don't take it anymore,im just going to it the old fashion way diet and exercise. I am watching dateline right now about supplements its shocking,what is in them.take care guys be care God bless you all,keep up the good work,and drink water:)
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