Arizona
Psychiatric Medication and Extreme Heat: What Arizona Patients Should Ask
By Dr. Stacey Forbes, DNP, APRN, PMHNP-BC
Key Takeaways
- Several classes of psychiatric medication affect how well the body sheds heat or how much fluid it holds — a minor detail in a temperate climate and a real consideration in an Arizona summer.
- This is a reason to review a regimen before the hot months, not a reason to stop anything. Stopping a psychiatric medication because of the weather carries its own substantial risks.
- Hydration status can change the blood level of some medications rather than only how comfortable they are to take.
- Bring the whole list — including over-the-counter medicines, allergy tablets, and supplements, several of which affect heat tolerance too.
Most people taking a psychiatric medication have never been asked about the weather, and in most of the country that is reasonable. In a place where daytime temperatures sit above 105°F for weeks at a stretch it is not. Some psychiatric medications change how efficiently the body cools itself or how much fluid it retains, and the sensible response to that is a conversation in April, not an emergency in July.
What these medications actually do
The body sheds heat mainly by sweating and by moving blood toward the skin. Several medication classes used in psychiatry touch one or both of those mechanisms. Medicines with anticholinergic properties — which includes some antidepressants, some older antipsychotics, and a number of common over-the-counter sleep and allergy products — can reduce sweating. Some antipsychotics affect the body’s temperature regulation more centrally. Stimulants raise metabolic activity and can blunt thirst. None of that makes any of these medications wrong for a patient in Arizona; it makes the summer a period worth planning for deliberately.
The fluid question
Heat changes fluid balance, and fluid balance changes the concentration of some medications in the blood — lithium being the clearest example, where dehydration raises the level rather than merely making a person uncomfortable. For anyone on a medication where blood levels are monitored, a hot summer is a reason to be more attentive to monitoring rather than less, and a stomach bug or a day of heavy outdoor work is worth mentioning rather than absorbing quietly.
What not to do
The instinct to stop a medication because of the heat is understandable and it is usually the wrong move. Stopping an antidepressant, a mood stabiliser, or an antipsychotic abruptly carries risks of its own — discontinuation effects, relapse, and in some cases considerably worse — and a relapse in August is not a safer outcome than the risk being avoided. The productive version of the same instinct is to raise it with the prescriber early, when there is time to adjust a dose, change a timing, or simply agree what to watch for.
- Do not stop or halve a psychiatric medication on your own because of heat
- Do raise it before the hot months, when there is room to adjust
- Do mention new over-the-counter medicines — antihistamines and sleep aids are the usual surprise
- Do say if you work outdoors or your air conditioning is unreliable, because that changes the picture more than the medication does
Who should raise it first
Some situations deserve the conversation earlier than others, and none of them are unusual in this state.
- Outdoor and construction work, or any job in an unconditioned space
- Older adults, who regulate temperature less efficiently and often take several medications at once
- Anyone on a medication with monitored blood levels
- Anyone whose home cooling is unreliable or whose electricity bill is a real constraint in summer
- Athletes and anyone training through the summer months
What a good answer looks like
A useful conversation is specific rather than reassuring. It should end with you knowing which of your medications, if any, is relevant; what symptoms mean stop and seek help rather than push through; whether any monitoring should change over the summer; and what to do on a day when you have been unwell or unusually exhausted. If the answer is that nothing in your regimen is particularly heat-relevant, that is a real answer and worth having explicitly.
Heat illness itself is a medical emergency and is not what an outpatient psychiatric practice manages. Confusion, a very high temperature, hot dry skin, fainting, or stopping sweating altogether are reasons to call 911, not to wait for an appointment.
Common Questions
Should I stop my medication in the summer?
No — not on your own. Stopping a psychiatric medication abruptly carries real risks including relapse and discontinuation effects. Raise the question with your prescriber before the hot months so there is time to adjust something if it is warranted.
Which medications matter most here?
The ones that reduce sweating or affect temperature regulation, and the ones where blood levels are monitored and can rise with dehydration. Which of those applies to you depends on your specific regimen, which is why it is worth reviewing the actual list rather than reasoning from a category.
Do over-the-counter medicines count?
Yes, and they are the most commonly missed part. Several widely used antihistamines and sleep aids have anticholinergic effects that reduce sweating. Bring them to the appointment along with supplements.
Is drinking more water enough?
Staying hydrated matters and is not the whole answer. Working outdoors, unreliable cooling, age, and the specific medications involved all change the picture, and heavy sweating replaced with water alone can shift electrolytes in its own right. It is worth a specific conversation rather than a general rule.
Can this be handled by telehealth?
Yes. It is a medication review, which is exactly the kind of appointment video handles well — and it removes a drive across the valley in the heat, which is its own barrier for many patients in the months this conversation is about.
Sources & Further Reading
- MedlinePlus — Heat Illness
- National Weather Service — Heat Safety
- Ready.gov — Extreme Heat
- 988 Suicide & Crisis Lifeline
Care in Arizona
Dr. Stacey Forbes, DNP, PMHNP-BC, provides integrative telehealth psychiatry to patients throughout Arizona. See psychiatric care across Arizona, or book a consultation →
If you need help right now
Willow & Stone is an outpatient practice and is not an emergency service. If you or someone you care about is in immediate danger, call 911.
For urgent mental health support at any hour, call or text 988 to reach the Suicide & Crisis Lifeline, or text HOME to 741741 for the Crisis Text Line. Both are free, confidential, and available 24/7 nationwide.
Dr. Stacey Forbes, DNP, APRN, PMHNP-BC
Board-certified Psychiatric-Mental Health Nurse Practitioner and founder of Willow & Stone Integrative Mental Health. Nearly two decades of clinical experience; integrative, root-cause psychiatry via telehealth. Licensed in Texas, New Mexico, Florida, Alaska, Arizona & Colorado.
About Dr. Forbes →