A nurse is preparing to administer haloperidol 5 mg IM to a client. The amount available is haloperidol 20 mg/mL. How many mL should the nurse administer?

(Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)

A. "I'll be glad when I can stop taking this medicine.": This statement indicates a misunderstanding about phenytoin therapy. Phenytoin is typically a long-term medication used to prevent seizures, and it is not typically discontinued unless under the guidance of a healthcare provider. The nurse should clarify that stopping the medication abruptly can lead to rebound seizures and should emphasize the importance of continuing the medication as prescribed.

B. "I have made an appointment to see my dentist next week.": This statement indicates appropriate understanding, as regular dental check-ups are important for individuals taking phenytoin due to the medication's potential side effect of gingival hyperplasia.

C. "I know that I cannot switch brands of this medication.": This statement demonstrates understanding, as different brands of phenytoin can have variations in bioavailability, which can affect seizure control. It is important for clients to remain consistent with the same brand or formulation unless directed otherwise by their healthcare provider.

D. "I will notify my doctor before taking any other medications.": This statement indicates understanding of the potential for drug interactions with phenytoin, as it is a hepatic enzyme inducer and can affect the metabolism of other medications. Clients should always consult their healthcare provider before taking any new medications or supplements to ensure compatibility with phenytoin therapy.

Tardive dyskinesia (TD) is a potential adverse effect associated with long-term use of antipsychotic medications like haloperidol. It manifests as involuntary, repetitive movements, primarily involving the face, mouth, and tongue. The nurse should suspect tardive dyskinesia when observing the following manifestations:

A. Involuntary pelvic rocking and hip thrusting movements: These movements are characteristic of tardive dyskinesia and indicate abnormal involuntary motor activity.

B. Urinary retention and constipation: These are not typical manifestations of tardive dyskinesia. Urinary retention and constipation can be side effects of anticholinergic medications but are not associated with tardive dyskinesia.

C. Fine hand tremors and pill rolling: These manifestations are more characteristic of parkinsonism, which can be a side effect of antipsychotic medications but is distinct from tardive dyskinesia.

D. Tongue thrusting and lip smacking: These are classic manifestations of tardive dyskinesia and indicate abnormal involuntary movements of the tongue and lips.

E. Facial grimacing and eye blinking: These are also common manifestations of tardive dyskinesia, involving involuntary movements of the face, including grimacing and blinking of the eyes.