Does Anxiolytic Medication Cause Weight Gain? the Risks - Psychiatry

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Is Anli Fu causing weight gain?


Hello Doctor: I have been taking Prozac and 5mg of Lexapro daily for my obsessive-compulsive disorder for several years now, and I have gained quite a bit of weight during this time.
I would like to ask you, how likely is it for Lexapro to cause weight gain? My doctor mentioned that this medication is less likely to lead to weight gain, but I have still gained 20-30 kilograms over the past four to five years (which is quite significant).
I'm not sure if it's due to my lifestyle or if the side effects of the medication are that pronounced...
I really dislike taking Lexapro because of this.
Based on your experience, do you think that the dosage of Lexapro I am taking has such significant side effects? I understand that my dosage is not very high; does the dosage affect the extent of weight gain? Additionally, if Lexapro is indeed causing my weight gain, is it due to increased appetite or a decrease in metabolism? How can I improve this situation? Thank you for your response, and I wish you all the best.

A Yue, 20~29 year old female. Ask Date: 2022/08/25

Dr. Liang Sunyuan reply Psychiatry


Hello, Ah Yue: Anliruf is indeed one of the medications in its class that is less likely to cause weight gain, but for some individuals, it can still lead to weight increase.
Factors such as increased appetite or metabolic changes may contribute to this.
The management strategies include dietary control and exercise, and it is also recommended to discuss this with your physician during follow-up visits.

Reply Date: 2022/08/25

More Info


Anxiolytic medications, particularly those used to treat anxiety and related disorders, can indeed have varying effects on weight. In your case, you are taking medications such as Paroxetine (commonly known as Paxil) and Aripiprazole (known as Abilify), both of which have been associated with weight changes in some patients.
Firstly, it’s important to clarify that not all anxiolytic medications cause weight gain. For instance, while some antidepressants and antipsychotics are known to have weight gain as a potential side effect, others may not. Paroxetine, which is a selective serotonin reuptake inhibitor (SSRI), is one of the antidepressants that has been linked to weight gain in some individuals. This can occur due to several mechanisms, including increased appetite and changes in metabolism.
On the other hand, Aripiprazole is considered to have a lower risk of weight gain compared to other antipsychotics. However, individual responses can vary significantly. Some patients may experience weight gain even with medications that are generally considered weight-neutral. The reasons for this can be multifactorial, including changes in appetite, lifestyle factors, and the underlying condition being treated.

In your situation, gaining 20 to 30 kilograms over four to five years is indeed significant and could be influenced by a combination of factors. These may include changes in your eating habits, physical activity levels, and the psychological effects of your condition. Stress and anxiety can lead to emotional eating or changes in metabolism, which can further complicate weight management.

Regarding your specific questions about the likelihood of weight gain with Aripiprazole and the potential mechanisms behind it, it is indeed possible that the medication could contribute to increased appetite or a decrease in metabolic rate. However, the extent of these effects can vary widely among individuals. The dosage of the medication can also play a role; higher doses may increase the risk of side effects, including weight gain.

To address your concerns about weight management while on these medications, consider the following strategies:
1. Consult Your Doctor: It's crucial to discuss your weight gain with your healthcare provider. They can evaluate whether your current medications are contributing to your weight changes and may suggest alternatives or adjustments to your treatment plan.

2. Monitor Your Diet: Keeping a food diary can help you become more aware of your eating habits. Focus on a balanced diet rich in fruits, vegetables, whole grains, and lean proteins while limiting processed foods and sugary snacks.

3. Increase Physical Activity: Incorporating regular exercise into your routine can help counteract weight gain. Aim for at least 150 minutes of moderate aerobic activity each week, along with strength training exercises.

4. Behavioral Strategies: Consider working with a nutritionist or a therapist who specializes in weight management. They can provide personalized strategies to help you manage your weight while on medication.

5. Mindfulness and Stress Management: Techniques such as mindfulness, yoga, or meditation can help manage stress and reduce emotional eating.

In summary, while medications like Paroxetine and Aripiprazole can contribute to weight gain, individual responses vary widely. It's essential to work closely with your healthcare provider to monitor your weight and make any necessary adjustments to your treatment plan. By combining medical guidance with lifestyle changes, you can better manage your weight and overall health.

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