When dealing with depression or severe anxiety, navigating the world of psychiatric medication can feel overwhelming. Recently, a major publication in The BMJ (British Medical Journal) sparked renewed conversations globally about how doctors prescribe antidepressants. The publication urged a closer look at the balance between the long-term benefits of these medications and the realities of severe withdrawal symptoms. This evolving science makes it more important than ever to understand exactly what you are putting into your body.
An SSRI, which stands for Selective Serotonin Reuptake Inhibitor, is the most commonly prescribed class of medication used to treat clinical depression and anxiety disorders. First introduced in the late 1980s with the famous drug Prozac, SSRIs are considered the “first-line” defense in mental health treatment because they are generally safer and have fewer side effects than older classes of antidepressants, explains an EBSCO publication.
The science behind SSRIs
Your brain cells (neurons) communicate with each other using chemical messengers called neurotransmitters. According to the Cleveland Clinic, serotonin is one of the most important neurotransmitters for regulating your mood, sleep and appetite, often dubbed the “feel-good” chemical.
According to the National Library of Medicine (NLM), when a neuron releases serotonin to send a happy or calm signal to the next neuron, it normally reabsorbs the excess serotonin quickly. This reabsorption is called “reuptake.”
If you have clinical depression, your brain may be reabsorbing the serotonin too fast, leaving you with low levels of this mood-boosting chemical. An SSRI works by acting as a microscopic blockade. It inhibits (stops) the reuptake of serotonin, leaving more of it floating around in your brain to keep your mood stabilized.
Why safety is a concern
While SSRIs are largely safe, the recent BMJ review highlighted a critical safety concern regarding long-term use and “antidepressant discontinuation syndrome.”
Because SSRIs artificially alter your brain chemistry, your brain becomes dependent on them to maintain balance. If you suddenly stop taking your medication or miss a few days, your brain experiences a sudden crash in serotonin. This can trigger debilitating withdrawal symptoms, including “brain zaps” (feeling electrical shocks in your head), severe nausea, vertigo and a rebound of deep depression. This is why doctors are increasingly cautious about how long patients remain on these drugs and how carefully they are tapered off.
“The conversation around SSRIs should be balanced, not alarmist,” Dr. Arthur Burnett tells Blavity Health. “These medications help many people, but patients also deserve transparent conversations about potential side effects, including emotional and sexual health changes, so treatment decisions can be made thoughtfully and safely.”
Another rare but critical safety concern is Serotonin Syndrome. As explained by the Mayo Clinic, if you mix an SSRI with other medications or supplements that also boost serotonin (like St. John’s Wort or certain migraine medications), your brain can become flooded with a toxic level of the chemical, leading to a life-threatening medical emergency characterized by high fever, tremors and seizures.
Risks and side effects
Like any medication that alters your fundamental biology, SSRIs come with a unique profile of potential side effects, especially during the first few weeks of treatment as your nervous system attempts to recalibrate. These medications function by increasing the availability of serotonin in the brain, but because serotonin receptors are located throughout the entire body (most notably in the gastrointestinal tract) the physiological impact is rarely localized to just your mood.
While many side effects fade over time, some can persist. The most common physical side effects include nausea, dry mouth, chronic headaches and insomnia or extreme fatigue. However, the most widely reported and frustrating long-term side effect is sexual dysfunction. Many patients, both men and women, experience a significant drop in libido, difficulty becoming aroused, or an inability to reach orgasm while on an SSRI.
Who should avoid SSRIs?
SSRIs are not a universal cure-all, and for certain populations, they can actually be dangerous.
People with bipolar disorder: If someone has undiagnosed bipolar disorder and is given an SSRI for depression, the sudden boost in serotonin can trigger a severe manic episode. SSRIs must be paired with a mood stabilizer in these patients, explains Healthline.
Teens and young adults: The FDA has placed a “black box” warning on all SSRIs stating that they can paradoxically increase the risk of suicidal thoughts and behaviors in children, teenagers and young adults under the age of 25 during the first few months of treatment.
Pregnant individuals: The Cleveland Clinic notes that while many SSRIs (like Zoloft) are considered safe during pregnancy, others (specifically Paxil) have been linked to a higher risk of fetal heart defects and must be avoided.
Safer alternatives
If SSRIs are not the right fit for your body, or if the side effects are unbearable, you have excellent, evidence-based alternatives to explore with your healthcare provider.
The safest and most effective long-term alternative, or addition, to an SSRI is Cognitive Behavioral Therapy (CBT). CBT teaches your brain to manually reroute negative thought patterns without using chemicals.
If medication is necessary but SSRIs fail, healthcare providers often switch to SNRIs, which target a second neurotransmitter to help boost energy. They may also prescribe atypical antidepressants like Wellbutrin, which target dopamine and generally do not cause sexual dysfunction or weight gain.
SSRIs are not quick fixes like taking aspirin for a headache. It takes your brain time to physically adapt to the new serotonin levels and grow new neural pathways. It is completely normal not to feel any emotional improvement for the first four to six weeks. Stick with it, and never give up on the medication without consulting your prescribing doctor first!
Do SSRIs cause weight gain?
While Selective Serotonin Reuptake Inhibitors (SSRIs) are transformative tools for managing mental health, the side effect of weight gain is a very real concern that often catches patients off guard. According to clinical data and publications found in PMC, it is common for individuals to see an increase of roughly 5 to 10 pounds, especially during long-term maintenance therapy.
Specifically, SSRIs may increase your biological drive for carbohydrate-heavy comfort foods, as your brain attempts to regulate serotonin levels through dietary sources. Furthermore, as the medication begins to lift the heavy fog of depression, many people find their previously suppressed appetite returning with a vengeance, leading to a natural increase in caloric intake.
Do SSRIs make you feel dull?
Many individuals prescribed SSRIs report a phenomenon known as emotional blunting, a common side effect where they feel emotionally flat, numb, or “gray.” While these medications are highly effective at raising the “floor” of one’s mood, they can inadvertently lower the emotional ceiling as well. This means that while you are no longer drowning in despair, you might also find it difficult to experience the extreme highs of joy, excitement or even spontaneous laughter.
This sense of being “dull” or “in a fog” can permeate various aspects of life, leading to reduced empathy, diminished motivation and even a diminished interest in hobbies that once brought genuine pleasure. Patients often describe the sensation as feeling like a spectator in their own lives rather than an active participant. If the trade-off for stability feels like losing your sense of self, it is a significant clinical signal to discuss with a healthcare provider. Adjusting the dosage or switching to a different class of antidepressants can often help restore that missing emotional range while still keeping the depression at bay.
Bottom line
SSRIs are highly effective, widely prescribed medications that treat depression and anxiety by increasing the availability of serotonin, the brain’s “feel-good” chemical. While generally safe, recent medical reviews remind us of the potential side effects of emotional blunting and sexual dysfunction, and how extremely severe withdrawal symptoms can occur when stopping the drug all at once. Consult your healthcare provider closely and find the correct dosage, alternative treatments and ways to manage your mental health safely.
Frequently Asked Questions
What is the most commonly used SSRI?
Sertraline (Zoloft) and escitalopram (Lexapro) are among the most frequently prescribed SSRIs worldwide due to their high efficacy rates and relatively mild side-effect profiles.
What is better than an SSRI for anxiety?
While SSRIs are standard medical treatments, comprehensive Cognitive Behavioral Therapy (CBT) combined with lifestyle modifications is widely considered the most effective, side-effect-free and long-lasting intervention for managing anxiety disorders.
Citations
Logan M. RFK Jr takes aim at “overprescribing” of psychiatric drugs. BMJ. 2026;393:s882. doi:https://doi.org/10.1136/bmj.s882
Harmon A. Prozac | Research Starters | EBSCO Research. EBSCO. Published 2023. https://www.ebsco.com/research-starters/health-and-medicine/prozac
Cleveland Clinic. Serotonin. Cleveland Clinic. Published March 18, 2022. https://my.clevelandclinic.org/health/articles/22572-serotonin
National Library of Medicine. Chapter 2—How Stimulants Affect the Brain and Behavior. Substance Abuse and Mental Health Services Administration (US); 2021. https://www.ncbi.nlm.nih.gov/books/NBK576548/
Mayo Clinic. Serotonin syndrome – symptoms and causes. Mayo Clinic. Published 2024. https://www.mayoclinic.org/diseases-conditions/serotonin-syndrome/symptoms-causes/syc-20354758
Nail R. Antidepressants and Bipolar Disorder. Healthline. Published August 10, 2025. https://www.healthline.com/health/bipolar-disorder/antidepressants
Clinic C. Are Antidepressants Safe During Pregnancy? Cleveland Clinic. Published April 14, 2025. https://health.clevelandclinic.org/can-you-take-antidepressants-while-pregnant
Mouawad M, Nabipur L, Agrawal DK. Impact of Antidepressants on Weight Gain: Underlying Mechanisms and Mitigation Strategies. Archives of clinical and biomedical research. 2025;9(3):183. https://pmc.ncbi.nlm.nih.gov/articles/PMC12121960/