A seasonal warning is being shared with people taking a widely prescribed antidepressant — as rising temperatures could trigger an uncomfortable and potentially risky side effect.

Why Sertraline Users Are Being Advised to Take Care

As warmer weather sets in, health experts are urging caution for those on Selective Serotonin Reuptake Inhibitors (SSRIs), including Sertraline, Fluoxetine, Escitalopram, and Citalopram.

These medications are commonly used to treat conditions like Depression and Anxiety, helping regulate mood by increasing serotonin levels in the brain.

But that same mechanism can have an unexpected effect when temperatures rise.

The Lesser-Known Side Effect

One issue that often flies under the radar is how SSRIs can interfere with the body’s ability to regulate heat.

Specifically, they can increase sweating — something that might seem minor, but becomes more significant in hot weather.

Excessive sweating can lead to:

  • Dehydration
  • Dizziness
  • Fatigue
  • In more serious cases, fainting

  • Senior man with towel suffering from heat stroke outdoors, low angle view

This happens because serotonin can affect the Hypothalamus, the part of the brain responsible for controlling body temperature.

When that system is disrupted, your body may struggle to cool itself properly — or overcompensate.

Why This Matters More During Warm Weather

During hotter days, your body is already working harder to stay cool.

Add medication that alters temperature regulation into the mix, and the risk of overheating increases — especially if you’re active, outdoors, or not staying hydrated.

Experts say this doesn’t mean people should stop taking their medication — but awareness is key.

What You Can Do to Stay Safe

Health organizations like Mind recommend a few simple precautions:

  • Stay hydrated — drink water regularly, even if you don’t feel thirsty
  • Wear light, breathable clothing
  • Avoid peak sun hours (typically late morning to mid-afternoon)
  • Take breaks in shaded or cool environments
  • Use fans or air conditioning where possible

Important Reminder

If you’re taking SSRIs, don’t make any changes to your medication without speaking to a healthcare professional.

This warning isn’t about panic — it’s about preparation.