5,500-6,999 SparkPoints 5,902

Why can't I loose weight, I found this information in antidepressants

Friday, May 30, 2014

Psychiatric Medications Make Weight Loss Nearly Impossible, but Weight Gain A Snap

By Rachel Gray

Who here has trouble losing weight? Why I could not lose the weight baffled me. Well, it’s actually more complex than I thought. First, a lack of self-control is usually the knee-jerk assumption as to why you gain weight. This is based on the belief that weight loss is a simple matter of thermodynamics: one takes in more calories than one “burns”. That is true – but only to a point. I take a combination of psychiatric medications; the resulting weight gain is what the scientific literature calls “antipsychotic induced weight gain” (AIWG) (Lett et al., 2012, P. 242). Knowing mine is AIWG is frustrating: It is why my 900 calorie diet and exercise regimen do not work.

Proof that most psychiatric medications cause weight gain is well-established (Allsion et al., 1999). ‘Antipsychotic medications’ (interchangable here with the phrase ‘psychiatric medications’) cause “…substantial weight gain, and weight gain is a leading factor in patient noncompliance and poses significant risk of diabetes, lipid abnormalities (that is, metabolic syndrome), and cardiovascular events including sudden death (Lett et al., 2012, P. 242).” The specific medications I’m talking about (and their corresponding illnesses) include the categories of antipsychotics, antidepressants, and mood stabilizers. The illnesses these work on are schizophrenia, depression, and bipolar disorder. What I am not going to address here include the anxiety and attention deficit disorders, and their corresponding medications (which often overlap, but not always).

Weight gain is THE inevitable side effect of specific psychiatric medications and/or combinations of medications. The comprehensive lay website CrazyMeds (highly recommended: well-researched and consumer-driven) devotes a section about weight gain from psychiatric medications:

“4.1  Weight gain

There are three known reasons as to why some meds make you fat.

1. H1 Antihistamines. This is most common way a drug can fatten you up like a veal calf. Most APs, especially Zyprexa are strong-to-potent antihistamines and, as I wrote above, antihistamines make you hungry and encourage you to keep the weight on. Being a potent antihistamine is also why you take these meds as they help you sleep and help fight anxiety. TCAs, especially Remeron, are also strong-to-potent antihistamines and notorious for weight gain.

2. Serotonin 5HT2C Antagonists. Drugs that interfere with serotonin at this specific receptor at going to make you gain weight. As with antihistamines these meds will make you hungry and keep the weight on. This is the primary reason why second-generation APs, especially Zyprexa and Seroquel, will cause you to pack on the pounds. Additionally they will mess with your insulin resistance, which is why your risk for diabetes increases if you take Geodon or Abilify and don’t gain any weight. And just like antihistamines you take these meds because they are 5HT2C antagonists, as that helps regulate dopamine. Other 5HT2C antagonists include Remeron and Prozac.

3. Decreasing corticotropin-releasing factor (CRF). Unlike the above two, this one is somewhat obscure, in the world of psychopharmacology at any rate. Like the other two it is possibly why the meds Lithium, Depakote, SSRIs, SNRIs, and assorted APs and other antidepressants (ADs) work.”

Health Behaviors

The typical reaction is to blame excess body fat on the person carrying it. Health professionals I deal with proselytize self-restraint and regular exercise. These are ‘health behaviors’ – control over eating is the biggie to be faced off in this essay because self-control is not as simple as “put down the fork and walk away”. While the exact mechanisms of action for antidepressants, antipsychotics, and mood stabilizers are relatively unknown, the results of Karen Davison’s (2013) study suggested that certain combinations impact weight gain as well as eating habits (more on eating behaviors later) (Davison, 2013, P. 189). Davison’s study (2013) found that there were “significant interactions among antidepressants, …antipsychotics, and mood stabilizers with BMI (P. 188).” Another study found that psychiatric medications, in certain combinations, affect the andrenergic system (having to do with adrenaline, epinephrine, and norepinephrine), although the role of adrenergic receptors in AIWG is unclear (Lett 2012, P. 255). This all has to do with eating behaviors.

Why so hungry all the time?

Psychiatric drugs stimulate one’s appetite so one is hungry all the time (hyperphagia), and therefore one eats more (Davison, 2013, P. 187). Treatment with antipsychotics leads to weight gain and alterations in carbohydrate and lipid metabolisms through increased appetite; leptin and ghrelin play an important role in the regulation of food intake. Body weight is regulated by a complex system, including both peripheral and central factors. Two of the hormones that play an important role in the regulation of food intake, energy metabolism, and body weight are leptin and ghrelin. Both originate in the periphery (peripheral nerves connect the spinal cord with your limbs) and signal through different pathways to the brain, particularly to the hypothalamus (Esen-Danaci et al., 2008, P. 1434). This is important because leptin is a protein that plays a major role in the regulation of appetite (‘health behavior’ territory), adiposity (body fat), and body weight. Psychiatric medications stimulate production of leptin and ghrelin.

After leptin is released by the adipose tissue into the bloodstream, it crosses the blood-brain barrier and binds to the hypothalamic leptin receptors, in the arcuate nucleus, giving information about the body energy stores. Administration of leptin into the arcuate nucleus results in decreased food consumption while leptin deficiency leads to increased food intake (Haupt et al., 2005). Leptin plays a significant role in long-term regulation of energy balance. It also plays a role in short-term regulation of food intake and body weight. Leptin is produced not only by adipose tissue, but also a small amount in the stomach. It plays a role in the control of meal size in cooperation with other satiety peptides (Pico et al., 2003, P. 735).

Ghrelin is a gastrointestinal peptide hormone that is found in the stomach, the gastrointestinal tract, pancreas, ovary, and adrenal cortex. In the brain, ghrelin-producing neurones have been identified in the pituitary and the hypothalamus (Jin et al., 2007, P. 70). Ghrelin plays a role in regulating feeding behavior and energy metabolism in the central nervous system; it is the first hormone found to stimulate appetite and food intake (Esen-Danaci et al., 2008, P. 1435).

“The concentration of circulating ghrelin is increased under conditions of negative energy balance such as starvation and anorexia nervosa while decreased under those of positive energy balance such as feeding and obesity in other words circulating ghrelin levels correlate inversely with BMI and body fat percentage (Esen-Danasi et al., 2008, P. 1435).”

What all this means is that psychiatric medications stimulate your appetite all the time. Regulating your “health behaviors” around eating takes phenomenal willpower and self-control because you are always feeling hunger pangs. It is a real battle to not give in to feeling hungry, something not to be taken lightly.

I’ve been on a 900 calorie, fresh veggie diet for five weeks, and do 45 minutes of aerobics daily. My weight has stabilized at 165# for five weeks. I should be losing weight, right? Well, that’s what’s so frustrating: If I eat less and exercise more, I SHOULD lose weight. This belief I refer to as “thermodynamics”, whereby one “burns” more calories than one ingests. (I refuse to eat any less, because I detest feeling hungry all the time and my body would probably go into starvation mode…) My weight gain is not thermodynamics: take fewer calories in, and simply ‘burn’ the fat off with exercise, nope! The weight gain started when my doctor prescribed a combination of medications (Effexor, Abilify, and Lamictal).

The hated side effect of this medication combination is weight gain, and there’s not a blessed thing I can do except go off the medications (which is not an option). So what all this means is that when you take certain combinations of psychiatric medications, the gods of good health behaviors – Diet and Exercise – mock you. Well, they mock me, anyway…

Why Diet and Exercise are Perhaps Futile

First of all, some of us (me) come from hearty peasant stock and our ancestors were broad, plump, and fertile as the women Peter Paul Rubens depicted.

Peter Paul Rubens, "Venus At Her Mirror"
Peter Paul Rubens, “Venus At Her Mirror”

Pharmacogenetic studies are finding that genetics also play a part in moderating the degree of weight gain from psychiatric medications (Lett et al., 2012, P. 244). With no medications, it is a chore and a daily conscientious effort to stay slim and at an optimal doctor’s-health-chart weight (at least, it is for me). The majority of atypical antipsychotics are metabolized by phase I cytochrome P450 (CYP450) isoenzymes (Lett et al., 2012, P. 244). (Isoenzymes are enzymes that differ in amino acid sequence but catalyze the same chemical reaction) (http://www.thefreedictionary.
com/isoenzyme). Pharmacokinetic studies found that poor CYP450 activity is associated with increased serum levels of antipsychotics that lead to increased weight gain (Lett et al., 2012, P. 244). Genetics plus psychiatric medications will lead to certain weight gain. That weight stays on, no matter how hard you exercise and deny yourself pizza.

AIWG goes hand in hand with metabolic changes – the kind that makes you unhappy because you out-grew your favorite pants. “Altered energy homeostasis” and “endocrine disturbances (Davison, 2013, P. 187)” are fancy terms for the physiological side effect of weight gain. Additionally, weight gain is a predictor of metabolic syndrome, which includes diabetes, heart problems, and high blood pressure which puts you at risk for stroke, among other things. The mechanisms linking psychiatric medications with the metabolic syndrome include “dysregulation of the hypothalamic-pituitary adrenal (HPA) axis and autonomic nervous system (ANS) via such pathways as an accumulation of “visceral adiposity” or body fat, and impaired insulin sensitivity, as well as serotonergic (serotonin) activity (Davison, 2013, P. 188).” To sum up the science, your metabolism comes to a screeching halt. No amount of dieting or exercise will help fend off that fat.

What I would recommend instead

First, stay on the medications. My own mental illness is severe and my doctor prescribed a combination of medications that work well. If I quit my medications, I would be slim, sexy, and suicidally depressed.

Second, self-acceptance of the new, bigger body is key. At this point in psychopharmacology, there are no viable options: The medications cause weight gain. So what is there outside of self-acceptance? It is unrealistic to give hope that we MIGHT one day have drugs that both work and do not make us fat. The medical community has certainly accepted it – they have known for ages that such drugs make patients gain inordinate amounts of weight. It is more realistic to just get used to the additional weight and accept the body as it is. If you need a new wardrobe, go for it!

Third, eat healthy and do the exercise routines you enjoy. Do it for health and for peace of mind. Just because you probably will not lose the weight, does not mean you should neglect healthy living. Also, what’s wrong with having extra weight if your blood pressure is fine and you show no signs of diabetes or other aspects of metabolic syndrome? This goes to the thought process of stigmatization, and how much we stigmatize ourselves and our bodies to start with.

Overweight is stigmatized, there’s no doubt about that. But then again, so is mental illness. And that’s a whole other article…


Allison, David B.; Mentore, J.L.; Moonseong, H.; Chandler, L.; Cappelleri, J.C.; Infante, M.C.; and Peter J. Weiden (1999). Antipsychotic-induced weight gain: A comprehensive research synthesis. American Journal of Psychiatry; Vol. 156. Pp
Share This Post With Others
Member Comments About This Blog Post
    My dr refuses to look at anything but my weight as issues for all my issues lololo ( Even my sugar issue). I do have mild depression but the sleep thing seriously I think is my biggest issue with losing weight. When I hit two or three days of really yucky sleep I usually stay the same or gain. I will sleep for seven hours but most often it is restless...... especially on Sunday nights. I have lost as much weight as my ticker says and lost it back. FRUSTRATING ! but I have to just keep moving forward and stay consistent. Don't let my heart get weary or my brain trick me.
    I have heard that Ibprophen can cause a shift in your hormones too that can cause you to not lose weight. It has been a year since I took beniril because every time I did I would go up three pounds. That one I know for sure. Then another mom told me about the over the counter pain killers so I switched to topical creams. I have some serious pain so this is hard. I cant always avoid them. Its the same with depression meds. If you need them its not good to not have them.
    Just stay consistent with moving, eating better and sleeping better ( Don't forget that one) ...... in the long run that be the best thing.

    Hugs and Prayers Constance/ Creativeheart5
    2505 days ago
    I'm on 2 antidepressants. But, for me, it's which came first the chicken or the egg. Depression caused eating, caused weight gain. In a year I've FINALLY lost 40 lbs. YEAH!!! But, I went over 2 months without losing an ounce. Remember the scale is only one measure. You say you feel better when you eat healthy. That's a non scale victory (NSV) right there. Look and you'll find many more, I'm sure. I guess the way I look at it is: If I eat healthy and (try) exercise, then I'm doing the best I can do. For sure, if I went back to my old eating habits, I'd gain 40 plus lbs. in 2 seconds!! It is a very interesting article. I think it all depends on the individual.
    2506 days ago
    I lost weight and was takin2 psych meds.
    Recently I was subscribed cortisone, gained 9 lost 4.5 within days of going off.
    I was also subscribed allergy *antihistamine meds which your article says also causes hunger!
    I had no idea:

    2. Serotonin 5HT2C Antagonists. Drugs that interfere with serotonin at this specific receptor at going to make you gain weight.

    *As with "antihistamines" these meds will make you hungry and keep the weight on
    Thank you for the article.

    2506 days ago
    I know Mary Beth, it is weird, I went over the lowest calorie range once. I drink water, eat fruit veggies. I am starting to get frustrated and cheat. I have to stop that now. My weight goes no place, I gain a bit loose a bit but not were I can say I lost weight! I have to keep focused, but it is that same thing with me, I don't loose the weight so I give up and go back to old habits. I feel so good when I eat right! I have to keep that in mind! That has to be my silver lining! Blessings to you my dear friend, Deb emoticon
    2506 days ago
  • MBPP50
    Hi Deb, I know that antidepressants CAN cause weight gain but I think that the weight gain depends on the individual. The only medication that I can say for sure caused me to gain weight was ambien and halcion because they both made me sleep eat. I would eat a whole bag of cookies and wake up in the morning with a bed full of crumbs and not remember. And this was every night. I am on two anti depressants and an anti anxiety med but I don't think they are keeping me from losing weight. Interesting study, though.
    2506 days ago
  • no profile photo CD14402600
    I hear you about the weight gain. I'm on anti depressants that supposedly don't make you gain weight, but I say yes they do!!! I know the only way the scales are going to budge is to week out all the bad stuff like pizza, candy, sweets and concentrate on the good only. You mentioned eating only 900 calories. That might not be enough. I know Sparkpeople suggests more. I'm no doctor so I'm not going to tell you what to do. I would check with you own doctor on that one ; ) Hope you get some answers. Eileen
    2506 days ago
    You are welcome Dari, I get so frustrated and yesterday I had a really bad food day. I had a candy bar, like 3 granola bars. This is got to stop. I have to keep away from the sugar. I am going to ask my psychiatrist what I can do, like I said, maybe he has a diet I can try or knows of something I need to add or take out of my diet to help. I go up and down so much, candy bar did not help. then I had a delight pizza from Papa Murphy's. I felt awful this morning. So even though I am not loosing weight I feel so much better when I eat right. We need to think about having a forum on this see if maybe someone more experienced then us has advice too! Blessings my friend! Hope your weekend is beautiful! Wisconsin is finally getting summer weather! Oh ya! Deb emoticon
    2506 days ago
    I am on those meds also Deb. This is a very in depth study and makes sense why I struggle so much with the whole self control issue and always being hungry. Like you I'm giving it to God to take care of and giving Him my faith that this can work out. Thank you for the interesting blog.
    2507 days ago
    I am on some pretty hefty anti depressants and anti anxiety meds, three different kinds I see my psychiatrist mid June I will see if there is something I can do, special diet, I don't know. I will not go off the meds because like she said I do not want to go back to the severe depression. His nurse was pretty vague. I just know I am keeping below my calories, I feel better! No complaints! Lost 10 lbs but since then nothing. I need to stay strong! That is hard when the scale does not move, or goes up! But I am holding on to faith. Thanks for the note! Deb
    2507 days ago
  • TINA8605
    I have dealt with the same issue. I told my Dr. before he put me on anything to make sure weight gain was not on the list. I was already anxious, depressed, etc. I didn't need to be taking something to add or make my issues any worse than they already were.
    Nice information you gave. Thank you.
    2507 days ago
  • Add Your Comment to the Blog Post

    Log in to post a comment

    Disclaimer: Weight loss results will vary from person to person. No individual result should be seen as a typical result of following the SparkPeople program.