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Torecan Side Effects

Generic Name: thiethylperazine

Note: This document contains side effect information about thiethylperazine. Some of the dosage forms listed on this page may not apply to the brand name Torecan.

For the Consumer

Applies to thiethylperazine: solution, suppository, tablet

Along with its needed effects, thiethylperazine (the active ingredient contained in Torecan) 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 as soon as possible if any of the following side effects occur while taking thiethylperazine:

Less Common or Rare

  • Abdominal or stomach pains
  • aching muscles and joints
  • blurred vision, change in color vision, or difficulty in seeing at night
  • confusion (especially in the elderly)
  • convulsions (seizures)
  • difficulty in speaking or swallowing
  • fast heartbeat
  • fever and chills
  • inability to move eyes
  • lip smacking or puckering
  • loss of balance control
  • mask-like face
  • muscle spasms (especially of face, neck, and back)
  • nausea, vomiting, or diarrhea
  • nightmares (continuing)
  • nosebleeds
  • puffing of cheeks
  • rapid or fine, worm-like movements of tongue
  • shuffling walk
  • skin itching (severe)
  • sore throat and fever
  • stiffness of arms or legs
  • swelling of arms, hands, and face
  • tic-like or twitching movements
  • trembling and shaking of hands and fingers
  • twisting movements of body
  • uncontrolled chewing movements
  • uncontrolled movements of arms or legs
  • unusual bleeding or bruising
  • unusual excitement, nervousness, restlessness, or irritability
  • unusual tiredness or weakness
  • weakness of arms and legs
  • yellow eyes or skin

Symptoms of Overdose

  • Confusion (severe)
  • convulsions (seizures)
  • dizziness (severe)
  • drowsiness (severe)
  • dry mouth (severe)
  • hyperextension of neck and trunk
  • inability to move eyes
  • loss of consciousness
  • spasms of face and neck
  • stuffy nose
  • troubled breathing

Some side effects of thiethylperazine 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

  • Dizziness
  • drowsiness

Less Common or Rare

  • Constipation
  • dizziness or lightheadedness, especially when getting up from a lying or sitting position
  • dryness of mouth, nose and throat
  • fainting
  • fever
  • headache
  • ringing or buzzing in ears
  • skin rash

For Healthcare Professionals

Applies to thiethylperazine: intramuscular solution, oral tablet

Nervous system

Nervous system side effects have included sedation, dizziness, or headache. Extrapyramidal reactions have been reported in less than 1% of patients and included dystonia, torticollis, oculogyric crises, akathisia, and gait disturbances. Pseudo-parkinsonian reactions including mask-like facies, drooling, cogwheel rigidity, and shuffling gait have been reported. Convulsions have also been reported rarely. Neuroleptic malignant syndrome has been reported with other phenothiazines, and the potential to occur with thiethylperazine (the active ingredient contained in Torecan) should be considered.[Ref]


Gastrointestinal side effects have included dryness of the mouth and nose, sialorrhea, and altered taste sensation.[Ref]


Hepatic side effects have rarely included the development of cholestatic jaundice.[Ref]


Hematologic side effects associated with phenothiazine derivatives have rarely included leukopenia, agranulocytosis, thrombocytopenia, aplastic anemia, pancytopenia, eosinophilia, and leukocytosis.[Ref]


Cardiovascular side effects have included hypotension during intravenous administration.[Ref]


Dermatologic side effects have rarely included erythema, exfoliative dermatitis, and contact dermatitis.[Ref]


Ocular side effects have included blurred vision.[Ref]


Hypersensitivity side effects including at least one case of anaphylactic reaction have been reported.[Ref]

A 15-year-old female was admitted for angioedema and respiratory distress coincident with thiethylperazine therapy. She had been prescribed thiethylperazine (total of three doses) for abdominal pain and heavy nausea lasting for 2 days. Three hours after the last dose, she began to complain of face and tongue edema, speech difficulties, and dysphagia. On physical examination, she was in good general condition and showed an angioedema and erythema of the face, the upper thorax, and the tongue. An anaphylactic reaction was suspected and treatment was initiated. Her symptoms improved after treatment with intravenous biperiden, two aerosols of albuterol and budesonide, and intravenous methylprednisolone.[Ref]


1. "Product Information. Torecan (thiethylperazine)" Roxane Laboratories Inc, Columbus, OH.

2. Rossetti G, Livio F, Roulet E, Hofer MF "Anaphylactic reaction and unrelated, subsequent, known side effects during therapy with thiethylperazine." Pediatr Allergy Immunol 16 (2005): 453-5

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.

More about Torecan (thiethylperazine)

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