Prolixin Decanoate, Modecate Decanoate
Moditen Enanthate , Prolixin Enanthate
Moditen HCl , Permitil, Prolixin
Classifications: psychotherapeutic; antipsychotic; phenothiazine; Therapeutic: antipsychotic
Pregnancy Category: C
1 mg, 2.5 mg, 5 mg, 10 mg tablets; 2.5 mg/5 mL elixir; 5 mg/mL oral concentrate; 2.5 mg/mL, 25 mg/mL injection
Potent phenothiazine, antipsychotic agent. Blocks postsynaptic dopamine receptors in the brain. Similar to other phenothiazines
with the following exceptions: more potent per weight, higher incidence of extrapyramidal complications, and lower frequency
of sedative, hypotensive, and antiemetic effects.
Effective for treatment of antipsychotic symptoms including schizophrenia.
Management of manifestations of psychotic disorders.
As antineuralgia adjunct.
Known hypersensitivity to phenothiazines; subcortical brain damage, comatose or severely depressed states, blood dyscrasias,
renal or hepatic disease; pregnancy (category C), lactation. Parenteral form not recommended for children <12 y.
With anticholinergic agents, other CNS depressants; older adults, previously diagnosed breast cancer; closed-angle glaucoma;
GI disorders; significant pulmonary disease; renal failure; seizure disorders; history of suicidal ideation or high risk for
suicide attempt; cardiovascular diseases; pheochromocytoma; history of convulsive disorders; patients exposed to extreme heat
or phosphorous insecticides; peptic ulcer; respiratory impairment.
Route & Dosage
Adult: PO 0.510 mg/d in 14 divided doses (max: of 20 mg/d) IM/SC HCl 2.510 mg/d divided q68h (max: 10 mg/d); Decanoate 12.525 mg q14wk; Enanthate 25 mg q2wk
Geriatric: PO 12.5 mg/d, may increase every 47 d by 12.5 mg/d (max: 20 mg/d in 23 divided doses)
- Note: Fluphenazine hydrochloride (HCl) is given PO and IM. Fluphenazine enanthate and decanoate are given IM or SC.
- Give sustained release tablets whole (need to be swallowed whole; not recommended for children).
- Dilute oral concentrate in fruit juice, water, carbonated beverage, milk, soup. Avoid caffeine-containing beverages (cola,
coffee) as a diluent, also tannic acid (tea) or pectinates (apple juice).
- Be careful not to contact skin or clothing with drug when preparing oral concentrate or liquid preparations for injection.
Warn patient to avoid spilling drug. If drug contacts skin, rinse/flush skin promptly with warm water.
- Give oral preparations at least 1 h before or 2 h after the antacid. Antacids diminish absorption.
- Protect all preparations from light and freezing. Solutions may safely vary in color from almost colorless to light amber.
Discard dark or otherwise discolored solutions.
- Store in tightly closed container at 15°30° C (59°86° F) unless otherwise specified by manufacturer.
Protect all forms from light.
Adverse Effects (≥1%)CNS: Extrapyramidal symptoms
(resembling Parkinson's disease), tardive dyskinesia
, sedation, drowsiness, dizziness, headache, mental depression
, catatonic-like state, impaired thermoregulation
, grand mal seizures. CV:
Tachycardia, hypertension, hypotension. GI:
Dry mouth, nausea, epigastric pain, constipation
, fecal impaction, cholecystic jaundice
Urinary retention, polyuria, inhibition of ejaculation. Hematologic:
Transient leukopenia, agranulocytosis
Contact dermatitis. Body as a Whole:
Peripheral edema. Special Senses:
Nasal congestion, blurred vision, increased intraocular pressure, photosensitivity. Endocrine:
and other cns depressants
may potentiate depressive effects; decreases seizure threshold, may need to adjust dosage of anticonvulsants
. Herbal: Kava
may increase risk and severity of dystonic reactions.
HCl is readily absorbed PO and IM; decanoate, enanthate have delayed IM absorption. Onset:
1 h HCl; 2472 h decanoate, enanthate. Peak:
0.5 h PO; 1.52 h IM HCl. Duration:
68 h HCl; 16 wk decanoate; 24 wk enanthate. Distribution:
Crosses bloodbrain barrier and placenta. Metabolism:
In liver. Half-Life:
15 h HCl; 3.6 d enanthate; 710 d decanoate.
Assessment & Drug Effects
- Report immediately onset of mental depression and extrapyramidal symptoms. Both occur frequently, particularly with long-acting
forms (decanoate and enanthate).
- Be alert for appearance of acute dystonia (see Appendix F). Symptoms can be controlled by reducing dosage or by adding an
antiparkinsonism drug such as benztropine.
- Be alert for red, dry, hot skin; full, bounding pulse, dilated pupils, dyspnea, mental confusion, elevated BP, temperature
over 40.6° C (105° F). Inform physician and institute measures to reduce body temperature rapidly. Extended exposure
to high environmental temperature, to sun's rays, or to a high fever places the patient taking this drug at risk for heat
- Lab tests: Monitor kidney function in patients on long-term treatment. Withhold drug and notify physician if BUN is elevated
(normal BUN: 1020 mg/dL). Also perform WBC with differential, liver function tests, periodically.
- Monitor BP during early therapy. If systolic drop is more than 20 mm Hg, inform physician.
- Monitor I&O ratio and bowel elimination pattern. Check for abdominal distension and pain. Monitor for xerostomia and constipation.
- Monitor children with routine cardiac studies for signs and symptoms of cardiac adverse effects.
- Note: Patients on large doses who undergo surgery and those with cerebrovascular, cardiac, or renal insufficiency are especially
prone to hypotensive effects.
Patient & Family Education
- Do not drive or engage in potentially hazardous activities until response to drug is known.
- Do not alter dosage regimen or stop taking drug abruptly. Do not give drug to any one else.
- Seek and obtain physician approval before taking any OTC drugs.
- Be alert for adverse effects, early detection is critical because both decanoate and enanthate have a long duration of action.
Inform physician promptly if following symptoms appear: Light-colored stools, changes in vision, sore throat, fever, cellulitis,
rash, any interference with your willful (volitional) movements.
- Make sure to eat and drink adequately in order to prevent constipation and dry mouth.
- Be aware that it may be difficult for you to adjust to extremes in temperature. Use caution because of this possible impaired
- Avoid exposure to sun; wear protective clothing and cover exposed skin surfaces with sun screen lotion (SPF above 12).
- Avoid alcohol while on fluphenazine therapy.
- Note: Fluphenazine may discolor urine pink to red or reddish brown.
- Periodic ophthalmologic exams are recommended.