15 Illegal Drugs that Cause Heat Intolerance

Overheating and Drug Use: The Silent Danger You Need to Know

Thyroid/Hormone Medicines

Thyroid studies have shown that extreme temperature – either heat or cold – affects thyroid function. While researchers are still performing blood studies to understand why this happens, they warn about taking measures to stay safe.

Too much thyroid hormone can lead to heat stress, including Methimazole, Propylthiouracil, and Levothyroxine. These can overstimulate the metabolism and sweat glands, causing dehydration.

Hormone replacement medications estrogen and progesterone behave similarly. People taking these prescription drugs should be aware and carefully monitor their wellness during prolonged time in the heat.

SSRIs and Tricyclic Antidepressants

Prescription or even illicit use of SSRIs and antidepressants can cause heat exhaustion.

SSIs, including Prozac and Zoloft, work by increasing serotonin in the brain. The result is improved mood, less anxiety, and fewer symptoms of depression. SSRIs can interfere with the body’s ability to regulate heat and sweating. People who spend a lot of time outdoors but need anxiety medications should mention their lifestyle to their doctor – benzodiazepines might be a better alternative.

TCAs amitriptyline and imipramine are also effective in the treatment of depression. How they interact with the brain can also interfere with signals regulating body temperature and sweating. That can lead to dehydration, increasing the likelihood of heat stroke or exhaustion.

Cold Medications and High Blood Pressure

Decongestant medications constrict the blood vessels to relieve congestion, increasing blood pressure and heart rate. Taking antibiotics with OTC treatment can heighten side effects. The body may not cool itself naturally when you take these medicines in the heat.

Combined, the dangers of blood pressure constriction and a lack of internal cooling mechanisms can cause a heat stroke, where the body’s temperature reaches 104°F.

Beta-blockers and Heat Intolerance

Metoprolol and propranolol manage hypertension and heart function by slowing the heart rate to reduce workload. But that also means the body’s ability to release heat through perspiration is also compromised. Using these prescription drugs means taking special care to avoid dehydration during sun exposure.

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Identifying the Symptoms of Heat Exhaustion or Heat Intolerance

Here are the symptoms of heat intolerance, which are especially critical to know if consuming alcohol, taking medicines, or using illegal drugs in the heat:

• Heavy sweating
• Not sweating at all
• Weakness or fatigue
• Nausea or vomiting
• Pale, clammy skin
• Weak pulse
• Muscle cramps or pain, especially in the abdomen or legs
• Headache

Experiencing dehydration and overheating means you need fluids and to find a cooled location immediately. Seek medical care if symptoms persist after cooling down or if you develop other issues.

The Typical Symptoms of Heat Stroke

Some of the symptoms overlap with heat intolerance. However, heat stroke is far more severe and can be life-threatening.

• High body temperature
• Red, hot, or dry skin
• Abnormally rapid pulse
• Confusion or disorientation
• Loss of consciousness
• Seizures
• Vomiting or diarrhea

It’s essential to call 911 for professional treatment if you are experiencing these symptoms, especially if you’ve consumed large amounts of alcohol or illegal drugs.

Safety First When Using Substances in the Heat

Alcohol, illegal drugs, and even prescription medications can make you more sensitive to heat and increase risk factors for dehydration. Here are some important steps to help avoid heat-related side effects:

• Drink plenty of water or non-alcoholic fluids. Avoid coffee or sports drinks, which have caffeine and can complicate the situation.
• Find shady areas to take breaks from the sunshine. Shade can help you avoid becoming dehydrated by regulating your core temperature.
• Wear protective clothing to keep the sun off your skin. Light colors are best for keeping cool, as they deflect some sunshine.
• Use sunscreen; reapply it as directed on the bottle or when sweating excessively. Avoiding sunburn can mean less stress on your body.
• Plan your outdoor activities for the morning or evening. The time of day can affect how fast you lose fluids and become dehydrated.
• Don’t overexert yourself. Limit strenuous activities and take breaks often to take a few sips of water and cool down. You’ll minimize your risk of dehydration.

Be aware that heat intolerance or stress can become a health emergency; it’s important to seek professional treatment. Taking drugs or drinking can interfere with the brain’s ability to send “cooling signals” to the body and affect the ability to cool itself naturally.