Overview

Depression is a common mental disorder involving an absence of interest in pleasurable activities and a depressed mood. Research suggests It affects approximately 10% of adults and 15% of the older population in the United Kingdom.¹ Thus, a common treatment for depression is the prescription of antidepressants. They are prevalently prescribed because although they may not cure depression or address the causes, they can improve symptoms.¹ However, weight gain has been reported as a side effect of many antidepressants.² The association between antidepressants and weight gain is a subject that is emerging to be a crucial issue in health and medicine.

This may be due to the increasing prevalence of mental health disorders which equally increases the prescription of antidepressants.³ These medications are important in the management of mental health conditions however, their risk of weight gain is of vital interest. It is significant to grasp the effect of these drugs on weight to allow professionals to deliver high standards of care.^4,5 This article will look at different types of antidepressants, the likelihood of weight gain as a side effect, lifestyle factors that may exaggerate the effects and the importance of communicating with your healthcare provider.

What are antidepressants?

Antidepressants are a group of medications used to treat psychological problems such as obsessive-compulsive disorder (OCD), Generalised Anxiety Disorder, Post-Traumatic Stress Disorder (PTSD) and in some cases used to treat chronic pain. Although the mechanism of action of antidepressants is not fully understood, the consensus is that they work by increasing the certain chemicals in the brain. These chemicals are called neurotransmitters such as serotonin and noradrenaline; they are associated with feelings and mood. Thus, these drugs aim to make patients resume their daily routine and feel more emotionally stable. It can decrease the likelihood of suicidal thoughts, as well as reduce insomnia, anxiety, and restlessness.^6,7

The use of these medicines has increased globally with the increase in mental disorders and especially in industrialised countries. Research shows antidepressant use is significantly increasing the Germany and the UK. It is more commonly used by women and people with disabilities.²

As mentioned previously, weight gain has been reported as a common side effect of the use of many antidepressants. Some studies have reported that a significant number of patients report weight gain as a side effect or discontinue medications due to weight problems. This risk is higher with some medications than others therefore the prevalence varies.^8,9 Weight gain can have psychological and physical health implications and must therefore be addressed with great consideration. 

Your general health

Weight gain can affect an individual’s general well-being physically and psychologically. Physically an increased body mass index BMI indicates poorer health and can lead to other diseases. Psychologically, it could lead to poor self-esteem and could aggravate preexisting mental health conditions. It also puts individuals at risk for further mental health damage as well as metabolic disorders 10^{,11, 12}. Recognizing and addressing these consequences are of utmost importance to optimize patient care and foster a holistic sense of well-being.

Mechanisms of weight gain

It is important to understand all the different layers of the mechanisms involved in weight gain mechanisms is of paramount importance when endeavouring to confront the matter of weight gain in individuals who are prescribed antidepressant medications.¹³

Antidepressants and appetite

Antidepressants can influence appetite and cravings; this means that they can easily result in weight gain for certain individuals. Certain antidepressants can affect one's appetite, making individuals more inclined to eat food in excess. Moreover, antidepressants regulate serotonin and dopamine both of which have a role in regulating hunger and satiety. Modifications in the functioning of these neurotransmitters may engender heightened desires for food items, especially those abundant in carbohydrates and sugar.^14,15

Metabolism

Weight gain may be attributed to metabolic changes and hormonal imbalances induced by antidepressant medication. Some antidepressants can alter the body's energy processing and storage mechanisms, leading to increased fat accumulation. Additionally, these medications can disturb the equilibrium of hormones responsible for regulating metabolism, including insulin, leptin, and cortisol. Imbalances in these hormones can exacerbate weight gain.^16,17

Your genes

Genetic factors may influence an individual’s predisposition to weight gain while using antidepressants as indicated by some researchers. For instance, some individuals may be affected by their body’s metabolism, hormones, and appetite. Recognizing the genetic predisposition to weight gain can assist in tailoring treatment approaches on an individual basis.¹⁸

Role of specific antidepressants

It is important to note that not all medications may lead to weight gain, the antidepressants vary in the severity of their side effects. Some antidepressants may lead to weight loss However, some serotonin reuptake inhibitors (SSRIs) and tricyclic antidepressants (TCAs), have been associated with a higher tendency of inducing weight gain. Elements such as the drug's mode of operation, receptor affinities, and individual reactions contribute to the diverse influence of antidepressants on weight.¹⁹

How to tackle weight gain

An important part of treating depression is managing weight gain associated with some medications. Numerous approaches could be applied to effectively handle this issue while also maximizing well-being. This includes lifestyle modifications such as improving sleep, regulating stress levels, dietary interventions, and regular physical activity. A well-balanced diet that includes plenty of fruits, vegetables, lean proteins, and whole grains can help manage weight and improve health. Likewise, it is important to control the intake of high-calorie and sugary foods. Secondly, consistent physical activity is an important factor to consider while managing weight gain. Activities such as jogging, brisk walking and strength training can aid burning of calories and management of weight. Dose or medication adjustments may need to be done in conjunction with these modifications.²⁰

Changes you can make

Lifestyle adjustments offer a viable approach to mitigating the weight increase associated with antidepressant usage. By implementing specific alterations to one's daily routines, individuals can effectively positively influence their weight. Placing emphasis on maintaining a healthy sleep pattern remains a crucial aspect, as sleep deprivation has been unequivocally linked to weight gain. Furthermore, the management of stress levels through mindfulness or relaxation techniques can prove to be immensely beneficial. Moreover, integrating regular physical activity into one's daily regimen is a valuable tool in weight management, encompassing activities such as walking, swimming, or cycling. Establishing attainable objectives and monitoring progress can foster motivation and provide invaluable support throughout the journey. It is imperative to bear in mind that lifestyle modifications ought to be tailored to individual requirements and capabilities.^21,22,23

Move more

Participating in regular physical activity is advised as a means of managing weight gain induced by antidepressants. Engaging in physical activity not only aids in the burning of calories but also contributes to overall well-being. The recommended goal is to strive for at least 150 minutes of aerobic activity at a moderate intensity or 75 minutes of aerobic activity at a vigorous intensity per week, in addition to engaging in muscle-strengthening exercises on two or more occasions. Examples of moderate-intensity activities encompass brisk walking, cycling, or swimming, while vigorous-intensity activities may entail running or engaging in aerobic dancing. It is imperative to select activities that are enjoyable and sustainable to ascertain adherence over the long term.^24,25

Medication adjustments and alternatives

Your medical experts are trained to guide you through the process of changing medication and preventing weight gain. In certain instances, a multidimensional approach that involves several approaches and the supplementation of some medicines may be helpful. Patients are encouraged to be honest and comfortable discussing their concerns with the health professional to reach the most acceptable solution to manage weight gain effectively while simultaneously tackling the symptoms associated with depression.¹⁹

Summary

In summary, weight gain may manifest as a consequential outcome of antidepressant treatment. It is imperative to diligently monitor and rectify alterations in weight among patients receiving antidepressant therapy. By doing so, healthcare providers can acquire a deeper comprehension of the ramifications of weight gain on patients' welfare and holistic psychological well-being. Furthermore, by attentively observing and assessing the situation, suitable measures can be implemented to effectively control and alleviate weight gain in such individuals.

Importance of monitoring weight

Monitoring weight fluctuations in individuals consuming antidepressant medications holds paramount importance for various reasons.

Primarily, it enables healthcare providers to promptly detect and tackle any substantial weight gain, thereby averting potential complications. Furthermore, consistent monitoring furnishes invaluable data for evaluating the efficacy of diverse therapeutic methodologies and effecting requisite modifications.¹⁹

Finding a balance

Attaining a fine equilibrium between the benefits and dangers of using antidepressant medications while acknowledging the potential for weight gain is an important subject for health professionals.

While these medications prove efficacious in mitigating depressive disorders, one must not disregard the peril of weight increase. Through meticulous assessment of everyone’s unique requirements and circumstances, healthcare providers can judiciously determine the most appropriate antidepressant medication, factoring in the potential adverse effects and the overarching benefits for the patient's mental equilibrium.²⁶