Sauna on amitriptyline: the hot weather fever warning

Short answer: The amitriptyline label has no sauna warning, but it reports hyperpyrexia, a very high fever, when amitriptyline is taken with anticholinergic drugs or with antipsychotics, particularly during hot weather. It also lists dizziness and a drop in blood pressure on standing, fainting, drowsiness and sun sensitivity. So before a sauna or hot tub on amitriptyline, check what else you take, keep heat short and moderate, skip alcohol, stand up slowly, and ask your prescriber first, especially if you are over 65.

A sauna on amitriptyline is not something the label forbids, and we found no study that tested the combination. What the amitriptyline label does say is pointed: hyperpyrexia has been reported when amitriptyline is given with anticholinergic agents or with neuroleptic (antipsychotic) drugs, particularly during hot weather.

The label lists amitriptyline for the relief of symptoms of depression. MedlinePlus adds that it is also used for eating disorders, for post-herpetic neuralgia (the lasting nerve pain after shingles) and to prevent migraine headaches. Someone taking it for nerve pain or migraine may never think of it as an antidepressant, or connect it with the heat.

This is general information, not medical advice, and it gives no dosing advice. Never stop or change amitriptyline to make room for a sauna; the label notes that stopping suddenly after long use can cause nausea, headache and malaise.

What the amitriptyline label says about heat

A combination warning, with hot weather named.

The hyperpyrexia line sits in the label’s precautions and drug interactions. It is about amitriptyline taken together with two groups: anticholinergic agents, and neuroleptic drugs, the older name for antipsychotics. The label also lists hyperpyrexia among amitriptyline’s own anticholinergic side effects.

The label does not say amitriptyline reduces sweating. It lists increased perspiration among its side effects, so sweating more in a sauna is not a reason for reassurance either way.

What matters is the combination. A person on amitriptyline alone is in a different place from a person also taking a bladder tablet, an allergy or sleep tablet, or an antipsychotic.

The medicines that change the answer

Check this list before the first session.

Anticholinergic drugs. These include common bladder medicines, which our guide to oxybutynin and Vesicare in the heat covers, some allergy and sleep tablets, covered in our guide to antihistamines, and glycopyrrolate, covered in our guide to glycopyrrolate in the heat. Several of their labels warn of heat stroke from decreased sweating on their own.

Antipsychotics. Our guides to Abilify, Risperdal or Zyprexa and Seroquel quote what their labels say about heat.

Other serotonergic medicines. The label warns of serotonin syndrome with other serotonergic drugs; its symptoms include sweating, flushing and a raised body temperature, which look like a hot session.

If any of these are on your list, the sauna question goes to your prescriber before anything else.

Amitriptyline, dizziness and getting up from the bench

The other warning a hot room meets.

The label lists hypotension, particularly orthostatic hypotension (a drop in blood pressure on standing), and syncope (fainting) among its side effects, along with drowsiness and dizziness. It also says older patients taking amitriptyline may be at increased risk for falls.

A hot room can make anyone light-headed on the way out, which our guide to feeling faint in a sauna explains. On amitriptyline, sit up, wait a minute, then stand slowly with a hand on the rail. If the room spins, sit or lie down where you are.

Sauna on amitriptyline: a plan that respects the label

Short, moderate, and never alone.

Keep sessions short and the heat moderate, and treat the first session on the drug, or after a dose change, as a test. Go with someone who knows you take amitriptyline.

Leave if you feel unusually hot, confused, dizzy or sick. MedlinePlus first aid for heat illness includes cool, wet cloths or cool water on the skin, which is what a cool shower does after a session.

Mind the time of day. The label describes amitriptyline as an antidepressant with sedative effects, so if you take your dose at night, a late evening sauna combines drowsiness with heat and a wet floor.

Drink water before and after. The label warns of hyponatremia (low blood sodium), with a higher risk in older patients, people taking diuretics and people who are volume-depleted, and it lists headache, confusion, weakness and unsteadiness among the signs. Large amounts of plain water after heavy sweating are not the answer if you feel any of those; tell your prescriber.

Hot tubs, hot yoga and cold plunges on amitriptyline

Different rooms, the same two questions.

A hot tub keeps you in heat with a wet step out at the end, the standing moment the label warns about. Our guide to hot tubs with high blood pressure covers getting out safely.

A hot yoga class adds the heat of your own muscles to a heated room, and standing up from the floor is part of the practice. A room-temperature class keeps the movement and drops the heat.

We found nothing in the label about cold water. The cautions for a plunge are the same as for anyone, and our guide to who should avoid cold plunging covers them.

Alcohol and sun on amitriptyline

Two label lines that follow you out of the sauna.

The label says amitriptyline may enhance the response to alcohol, and alcohol in a sauna is a bad idea on its own, as our guide to drinking in a sauna explains.

The label also lists photosensitization, skin that reacts more to sunlight. An outdoor sauna or a poolside day needs shade and sunscreen, and our guide to sunburn and the sauna covers heat on burnt skin.

Amitriptyline, heat and cold at a glance

Practice	Fine as is	Needs adjusting	Avoid
Sauna, steam room	Nothing, without a plan	Short, moderate heat, a slow exit	Heat while also on an anticholinergic or antipsychotic, unless your prescriber agrees
Hot tub	Nothing, without a plan	Short soaks, sit before standing	Soaking while drowsy
Hot yoga	Room-temperature classes	Ask your prescriber first	Pushing through dizziness
Cold plunge	The usual cautions	A slow climb out	Plunging straight after a long hot session
Alcohol and sun	Shade and sunscreen	Nothing	Drinking in the heat

What is oversold about amitriptyline and the heat

A low dose is still the same drug.

The tempting thought is that a small dose for pain or migraine cannot matter in a sauna. The label makes no such distinction for its warnings, and MedlinePlus advises that older adults should not usually take amitriptyline, because other medicines for the same condition are safer.

The other myth is that sweating more means the heat is working well. The label lists increased sweating as a side effect, and a sweaty session says nothing about whether your temperature is rising too far.

What belongs to your prescriber on amitriptyline

The medicine list, any fall, and any fever.

Show your prescriber everything you take, including over-the-counter allergy and sleep tablets, since the hot weather warning is about combinations. A fall, a faint, or confusion after heat are reasons to call. People over 65 should ask before adding regular heat.

Call 911 for signs of heat stroke. MedlinePlus lists a temperature above 104°F (40°C) with significant neurologic symptoms.

FAQ: saunas and hot tubs on amitriptyline

Can I use a sauna on amitriptyline? Often, with a plan, but check your other medicines first. The label reports very high fever when amitriptyline is taken with anticholinergic or antipsychotic drugs, particularly in hot weather, and lists dizziness and fainting on standing. Keep heat short, go with someone, and ask your prescriber.

Does amitriptyline make you overheat? The label lists hyperpyrexia among its anticholinergic side effects and reports it with certain drug combinations, particularly during hot weather. It does not say amitriptyline reduces sweating; it lists increased perspiration.

Can I use a hot tub on a low dose of amitriptyline for pain or migraine? The label’s warnings do not depend on why you take it. Amitriptyline has sedative effects, so avoid a hot tub while drowsy, keep soaks short, and stand up slowly.

Can I drink alcohol in a sauna on amitriptyline? No. The label says amitriptyline may enhance the response to alcohol, and alcohol in the heat raises the risk of heat illness and falls on its own.

Is amitriptyline safe in the sun? The label lists photosensitization among its side effects. Use shade and sunscreen for outdoor heat, and avoid long sessions in direct sun.

The bottom line on amitriptyline and the sauna

Amitriptyline’s heat warning is about combinations: very high fever with anticholinergic or antipsychotic drugs, particularly in hot weather. On its own it can still drop your blood pressure when you stand and make you drowsy, so the session needs a slow exit and no alcohol.

Check every medicine you take with your prescriber, keep heat short and moderate, and treat dizziness, confusion or a fever after heat as a reason to stop. Our index of what FDA drug labels say about heat quotes the amitriptyline label word for word.