New lip smacking, tongue thrusting, or grimacing in a client on antipsychotics — report promptly; the chance of reversal is highest early.
Before you read
Test yourself first: 5 questions
Question 1 of 5
A client has been taking an antipsychotic and is now scheduled to be assessed with the Abnormal Involuntary Movement Scale (AIMS). What is the primary purpose of this assessment tool?
Answer: A. The Abnormal Involuntary Movement Scale (AIMS) is used to screen for and monitor abnormal involuntary movements, primarily to detect early signs of tardive dyskinesia in clients on antipsychotic therapy. Routine AIMS assessments allow early intervention, since tardive dyskinesia may become irreversible.
Question 2 of 5
A client has been taking an antipsychotic for several years and now shows involuntary lip smacking, tongue protrusion, and facial grimacing. Which adverse effect does the nurse recognize?
Answer: B. Repetitive, involuntary movements of the face, tongue, and mouth (lip smacking, tongue protrusion, grimacing) developing after long-term antipsychotic use describe tardive dyskinesia. It may be irreversible, so early recognition and dose review are important.
Question 3 of 5
A client started on an antipsychotic paces constantly and reports an inner feeling of restlessness and inability to sit still. The nurse identifies this as which extrapyramidal effect?
Answer: B. Akathisia is a subjective sense of inner restlessness with an inability to remain still, often shown by pacing or rocking. It is frequently mistaken for worsening agitation but is a medication side effect. Treatment may include lowering the dose or adding a beta blocker such as propranolol. Dystonia involves muscle spasms, tardive dyskinesia involves involuntary facial movements, and pseudoparkinsonism involves tremor and bradykinesia.
Question 4 of 5
A client on long-term antipsychotic therapy exhibits involuntary lip smacking, tongue protrusion, and facial grimacing. The nurse identifies this as which extrapyramidal effect?
Answer: B. Tardive dyskinesia is a late-onset extrapyramidal side effect of long-term antipsychotic use, characterized by involuntary, repetitive movements of the face, tongue, and mouth (lip smacking, tongue protrusion, grimacing). It may be irreversible and must be reported promptly.
Question 5 of 5
A client taking an antipsychotic develops involuntary lip-smacking, tongue protrusion, and facial grimacing after long-term therapy. The nurse recognizes these findings as which condition?
Answer: C. Tardive dyskinesia is a late-onset extrapyramidal effect of long-term antipsychotic use, characterized by involuntary, repetitive movements of the face, tongue, and mouth, such as lip-smacking and tongue protrusion. It may be irreversible, so early recognition and reporting are essential. Acute dystonia involves sustained muscle spasms early in therapy, akathisia is motor restlessness, and pseudoparkinsonism causes tremor and rigidity.
Keep the streak going with more questions like these, each with a full rationale.
What is tardive dyskinesia?
Months to years of D2 receptor blockade make the brain add D2 receptors and become oversensitive to dopamine. The result is involuntary, repetitive, purposeless movements, most often of the mouth, tongue, and face. TD can persist or even worsen after the drug is stopped, but it may be reversible if caught early. That is why the nurse screens regularly with the AIMS and reports the first subtle movements.
Key points to remember
- Classic signs: lip smacking, tongue protrusion or side-to-side tongue movements, chewing or rhythmic jaw movements, cheek puffing, grimacing, and blinking. Fingers, toes, and the trunk (rocking, twisting) can also be involved.
- Timing sets TD apart: acute dystonia, akathisia, and pseudoparkinsonism appear early in treatment; TD appears after months to years.
- Causes: first-generation antipsychotics (haloperidol, chlorpromazine, fluphenazine) carry more risk than second-generation agents; metoclopramide and prochlorperazine can also cause it.
- Risk factors: longer exposure and higher cumulative dose, older age, female sex, mood disorders, diabetes, and a history of EPS.
- The Abnormal Involuntary Movement Scale (AIMS) is the standard tool to screen for and monitor TD.
- Treatment: lower or stop the causative drug (tapered, because abrupt withdrawal can worsen movements), consider switching to clozapine, and use a VMAT2 inhibitor: valbenazine (once daily), deutetrabenazine (twice daily, or once daily as an extended-release tablet), or tetrabenazine.
- Anticholinergics help acute dystonia and parkinsonism but can worsen TD.
Common causes
- Long-term antipsychotic use
- May be PERMANENT/irreversible
Signs & symptoms
- Lip smacking, tongue protrusion
- Facial grimacing, chewing motions
- Choreoathetoid limb movements
Nursing priorities
- Screen with the AIMS at regular intervals for every client on long-term antipsychotics, because TD caught early may be reversible.
- Report new mouth, tongue, face, or limb movements promptly, because the provider can lower, stop, or switch the drug before movements become permanent.
- Distinguish TD from acute EPS by timing and movement type, because acute reactions respond to anticholinergics while TD can worsen with them.
- Give VMAT2 inhibitors as ordered and track AIMS scores over time, because the scores show whether treatment is working.
- Support nutrition and safety when mouth or tongue movements affect eating or swallowing, because these movements can interfere with intake.
- When the provider lowers or stops the antipsychotic for TD, follow the ordered taper, because sudden withdrawal can cause withdrawal dyskinesia.
Worked example
- Cue: At a routine visit, a client who has taken haloperidol for years has new lip smacking and side-to-side tongue movements.
- Meaning: Late-onset, involuntary orofacial movements after long-term D2 blockade point to TD, not acute EPS.
- Action: Complete an AIMS, document the score, and report to the provider; do not give an anticholinergic.
- Evaluation: The provider adjusts the antipsychotic or adds a VMAT2 inhibitor, and repeat AIMS scores show whether movements decrease.
Patient teaching
- Tell your provider right away about any movements of your mouth, tongue, face, hands, or feet that you can't control.
- Keep your movement check-ups. A short exam called the AIMS looks for early signs.
- Don't stop your medicine on your own. Stopping suddenly can make movements worse; your provider can change it safely.
- Medicines are available that can reduce these movements.
Memory tricks
- 'Tardive' means late: TD shows up after months to years, unlike dystonia and akathisia.
Common mistakes
- Giving an anticholinergic for TD. It treats acute dystonia, not TD, and may worsen it.
- Confusing TD with acute EPS. Dystonia, akathisia, and pseudoparkinsonism come early; TD comes after months to years.
- Assuming second-generation antipsychotics carry no risk. The risk is lower, not zero.
- Forgetting non-psychiatric causes such as long-term metoclopramide.
Red flags: report now
- New lip smacking, tongue thrusting, or grimacing in a client on antipsychotics — report promptly; the chance of reversal is highest early.
- Movements that interfere with chewing or swallowing — notify the provider and assess aspiration risk.
- A client planning to stop the antipsychotic on their own — notify the provider; abrupt withdrawal can worsen movements.
References
Clinical references for this topic
