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Loxapine

Loxapine Side Effects

Ashley Wong, PharmDKristianne Hannemann, PharmD
Reviewed by Ashley Wong, PharmD, Kristianne Hannemann, PharmD
Last reviewed on May 11, 2023

The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.

Common Side Effects

  • Drowsiness
  • Extrapyramidal symptoms (movement problems, such as shakiness, stiffness, excess saliva, and loss of facial expression)
  • Restless muscles (akathisia)

Less Common Side Effects

  • Dizziness
  • Feeling faint
  • Sleepiness or trouble sleeping
  • Confusion
  • Trouble swallowing or breathing
  • Agitation (distress)
  • Slurred speech
  • Hair loss
  • Dry mouth
  • Nausea

Loxapine serious side effects

Contact your healthcare provider immediately if you experience any of the following.

  • Neuroleptic malignant syndrome (NMS): high fever, muscle stiffness, confusion, sweating, changes in pulse, heart rate, and blood pressure
  • Uncontrollable muscle movements of the face, tongue, or other body parts: sticking out your tongue, puffing out your cheeks, puckering your mouth, lip smacking, chewing, shaking in your arms and legs
  • Serious infection (from low blood cell count): fever, weakness, fatigue, sore throat, cough, body aches, chills
  • Seizures

Source: DailyMed

The following Loxapine side effects have also been reported

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

More common

Difficulty with speaking or swallowing

lip smacking or puckering

loss of balance control

mask-like face

puffing of the cheeks

rapid or fine, worm-like movements of the tongue

restlessness or desire to keep moving

shuffling walk

slowed movements

stiffness of the arms and legs

trembling and shaking of the fingers and hands

uncontrolled chewing movements

uncontrolled movements of the arms or legs

Less common

Constipation (severe)

difficult urination

inability to move the eyes

muscle spasms, especially of the neck and back

skin rash

twisting movements of the body

Rare

Difficult or fast breathing

fast heartbeat or irregular pulse

fever (high)

high or low blood pressure

increased blinking or spasms of the eyelid

increased sweating

loss of bladder control

muscle stiffness (severe)

seizures

sore throat and fever

uncontrolled twisting movements of the neck, trunk, arms, or legs

unusual bleeding or bruising

unusual facial expressions or body positions

unusual tiredness or weakness

unusually pale skin

yellow eyes or skin

Get emergency help immediately if any of the following symptoms of overdose occur:

Symptoms of overdose

Dizziness, faintness, or lightheadedness when suddenly getting up from a lying or sitting position

drowsiness (severe)

irregular, fast or slow, or shallow breathing

loss of consciousness

muscle trembling, jerking, stiffness, or uncontrolled movements (severe)

pale or blue lips, fingernails, or skin

troubled breathing (severe)

unusual tiredness or weakness (severe)

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

Blurred vision

confusion

dizziness, lightheadedness, or fainting

drowsiness

dryness of the mouth

Less common

Constipation (mild)

decreased sexual ability

enlargement of the breasts (males and females)

headache

increased sensitivity of the skin to sunlight

missing menstrual periods

nausea or vomiting

trouble with sleeping

unusual secretion of milk

weight gain

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

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Why trust our experts?

Ashley Wong, PharmD, is a licensed pharmacist in California. She has over 6 years of experience providing drug information.
Kristianne Hannemann, PharmD, is a licensed pharmacist in California. She has been a retail pharmacy manager and staff pharmacist for over 7 years and has contributed drug information content to different health companies.

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