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Compro

Prochlorperazine · Suppository

Prescription ANDA TE AB Official labelling
Informational index, not medical advice. Content is reproduced from public FDA and NLM data. Always confirm against the manufacturer's current prescribing information. Report adverse events to FDA MedWatch.

Overview

Brand name
Compro
Generic name
Prochlorperazine
Dosage form
Suppository
Route
Rectal
Marketing category
ANDA · ANDA
Labeler
PD-Rx Pharmaceuticals, Inc.
Product type
Human Prescription Drug
DEA schedule
Not scheduled
Active ingredients
1
NDC product codes
2
Packages
3
Data completeness
76% of corroborating sources present

Active ingredients

Source: NDC Directory
Active ingredients and strengths as listed in the NDC Directory.
Ingredient Strength RxCUI Monograph
Prochlorperazine 25 mg/1 198159 —

Forms, strengths and routes

Source: NDC Directory
Dosage form
Suppository
Route of administration
Rectal
Presentations
5

Pharmacologic classes are listed in the class section below.

Pharmacologic class

Source: NDC Directory
Established pharmacologic classes (EPC), mechanisms of action (MoA), chemical structures (CS) and physiologic effects (PE).
Class Type Browse
Phenothiazine [EPC] EPC All 35 members
Phenothiazines [CS] CS All 35 members

Regulatory status

Source: Drugs@FDANDC Directory
Application number
040246
Application type
ANDA · Abbreviated New Drug Application
Approval date
June 28, 2000
Sponsor
PADAGIS US
Products on application
1
Submissions recorded
9
Products approved under application 040246.
Product Trade name Form Strength Ingredient Status TE Flags
040246-001 COMPRO SUPPOSITORY PROCHLORPERAZINE Prescription AB

Therapeutic equivalence

Source: Orange Book
TE code
AB
Reference Listed Drug
No
Reference Standard
No

What this rating means: Therapeutically equivalent — bioequivalence demonstrated by in vivo or in vitro testing

Codes beginning with “A” indicate products the FDA considers therapeutically equivalent. Codes beginning with “B” indicate bioequivalence has not been established. See methodology.

Approval history

Source: Drugs@FDA
Most recent submissions on application 040246.
Type No. Action Status Date Review
Supplement 18 Labeling Approved January 22, 2025 Standard
Supplement 14 Labeling Approved February 23, 2017 Standard
Supplement 13 Labeling Approved October 25, 2011 —
Supplement 12 Labeling Approved December 3, 2010 —
Supplement 8 Labeling Approved July 7, 2009 —
Supplement 7 Labeling Approved March 3, 2009 —
Supplement 6 Labeling Approved May 15, 2008 —
Supplement 1 Manufacturing (CMC) Approved February 9, 2001 —
Original application 1 Approved June 28, 2000 —

Review documents

  • 0 · Original application · June 28, 2000
  • 0 · Original application · June 28, 2000

Prescribing information

Source: openFDA Drug Labeling

Reproduced verbatim from the Structured Product Labeling submitted to the FDA (effective 20250320). This is the manufacturer's labelling text, not a summary and not advice.

HUMAN PRESCRIPTION DRUG · 20250320 HUMAN PRESCRIPTION DRUG · 20241120

Boxed Warning

openFDA Drug Labeling

WARNING Increased Mortality in Elderly Patients with Dementia-Related Psychosis Elderly patients with dementia-related psychosis treated with antipsychotic drugs are at an increased risk of death. Analyses of seventeen placebo-controlled trials (modal duration of 10 weeks), largely in patients taking atypical antipsychotic drugs, revealed a risk of death in drug-treated patients of between 1.6 to 1.7 times the risk of death in placebo-treated patients. Over the course of a typical 10-week controlled trial, the rate of death in drug-treated patients was about 4.5%, compared to a rate of about 2.6% in the placebo group. Although the causes of death were varied, most of the deaths appeared to be either cardiovascular (e.g., heart failure, sudden death) or infectious (e.g., pneumonia) in nature. Observational studies suggest that, similar to atypical antipsychotic drugs, treatment with conventional antipsychotic drugs may increase mortality. The extent to which the findings of increased mortality in observational studies may be attributed to the antipsychotic drug as opposed to some characteristic(s) of the patients is not clear. Compro ® Prochlorperazine Suppositories USP is not approved for the treatment of patients with dementia-related psychosis (see WARNINGS ).

Indications and Usage

openFDA Drug Labeling

INDICATIONS AND USAGE Prochlorperazine 25 mg suppositories are indicated in the control of severe nausea and vomiting in adults.

Dosage and Administration

openFDA Drug Labeling

DOSAGE AND ADMINISTRATION Adults: Dosage should be increased more gradually in debilitated or emaciated patients. Elderly Patients: In general, dosages in the lower range are sufficient for most elderly patients. Since they appear to be more susceptible to hypotension and neuromuscular reactions, such patients should be observed closely. Dosage should be tailored to the individual, response carefully monitored and dosage adjusted accordingly. Dosage should be increased more gradually in elderly patients. To Control Severe Nausea and Vomiting: Adjust dosage to the response of the individual. Begin with the lowest recommended dosage. Rectal Dosage: 25 mg twice daily.

Contraindications

openFDA Drug Labeling

CONTRAINDICATIONS Do not use in comatose states or in the presence of large amounts of central nervous system depressants (alcohol, barbiturates, narcotics, etc.). Do not use in pediatric surgery. Do not use in children under 2 years of age or under 20 lbs. Do not use in children for conditions for which dosage has not been established.

WARNINGS Increased Mortality in Elderly Patients with Dementia-Related Psychosis Elderly patients with dementia-related psychosis treated with antipsychotic drugs are at an increased risk of death. Compro ® Prochlorperazine Suppositories USP is not approved for the treatment of patients with dementia-related psychosis (see BOXED WARNING ). The extrapyramidal symptoms which can occur secondary to prochlorperazine may be confused with the central nervous system signs of an undiagnosed primary disease responsible for the vomiting, e.g., Reye's Syndrome or other encephalopathy. The use of prochlorperazine and other potential hepatotoxins should be avoided in children and adolescents whose signs and symptoms suggest Reye's Syndrome. Tardive Dyskinesia: Tardive dyskinesia, a syndrome consisting of potentially irreversible, involuntary, dyskinetic movements, may develop in patients treated with neuroleptic (antipsychotic) drugs. Although the prevalence of the syndrome appears to be highest among the elderly, especially elderly women, it is impossible to rely upon prevalence estimates to predict, at the inception of neuroleptic treatment, which patients are likely to develop the syndrome. Whether neuroleptic drug products differ in their potential to cause tardive dyskinesia is unknown. Both the risk of developing the syndrome and the likelihood that it will become irreversible are believed to increase as the duration of treatment and the total cumulative dose of neuroleptic drugs administered to the patient increase. However, the syndrome can develop, although much less commonly, after relatively brief treatment periods at low doses. There is no known treatment for established cases of tardive dyskinesia, although the syndrome may remit, partially or completely, if neuroleptic treatment is withdrawn. Neuroleptic treatment itself, however, may suppress (or partially suppress) the signs and symptoms of the syndrome and thereby may possibly mask the underlying disease process. The effect that symptomatic suppression has upon the long-term course of the syndrome is unknown. Given these considerations, neuroleptics should be prescribed in a manner that is most likely to minimize the occurrence of tardive dyskinesia. Chronic neuroleptic treatment should generally be reserved for patients who suffer from a chronic illness that, 1) is known to respond to neuroleptic drugs, and 2) for whom alternative, equally effective, but potentially less harmful treatments are not available or appropriate. In patients who do require chronic treatment, the smallest dose and the shortest duration of treatment producing a satisfactory clinical response should be sought. The need for continued treatment should be reassessed periodically. If signs and symptoms of tardive dyskinesia appear in a patient on neuroleptics, drug discontinuation should be considered. However, some patients may require treatment despite the presence of the syndrome. For further information about the description of tardive dyskinesia and its clinical detection, please refer to the sections on PRECAUTIONS and ADVERSE REACTIONS . Neuroleptic Malignant Syndrome (NMS): A potentially fatal symptom complex sometimes referred to as Neuroleptic Malignant Syndrome (NMS) has been reported in association with antipsychotic drugs. Clinical manifestations of NMS are hyperpyrexia, muscle rigidity, altered mental status and evidence of autonomic instability (irregular pulse or blood pressure, tachycardia, diaphoresis and cardiac dysrhythmias). The diagnostic evaluation of patients with this syndrome is complicated. In arriving at a diagnosis, it is important to identify cases where the clinical presentation includes both serious medical illness (e.g., pneumonia, systemic infection, etc.) and untreated or inadequately treated extrapyramidal signs and symptoms (EPS). Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever and primar …

Adverse Reactions

openFDA Drug Labeling

ADVERSE REACTIONS Drowsiness, dizziness, amenorrhea, blurred vision, skin reactions and hypotension may occur. Cholestatic jaundice has occurred. If fever with grippe-like symptoms occurs, appropriate liver studies should be conducted. If tests indicate an abnormality, stop treatment. There have been a few observations of fatty changes in the livers of patients who have died while receiving the drug. No causal relationship has been established. Leukopenia and agranulocytosis have occurred. Warn patients to report the sudden appearance of sore throat or other signs of infection. If white blood cell and differential counts indicate leukocyte depression, stop treatment and start antibiotic and other suitable therapy. Neuromuscular (Extrapyramidal) Reactions These symptoms are seen in a significant number of hospitalized mental patients. They may be characterized by motor restlessness, be of the dystonic type, or they may resemble parkinsonism. Depending on the severity of symptoms, dosage should be reduced or discontinued. If therapy is reinstituted, it should be at a lower dosage. Should these symptoms occur in children or pregnant patients, the drug should be stopped and not reinstituted. In most cases barbiturates by suitable route of administration will suffice. (Or, injectable diphenhydramine may be useful.) In more severe cases, the administration of an anti-parkinsonism agent, except levodopa (see PDR ) , usually produces rapid reversal of symptoms. Suitable supportive measures such as maintaining a clear airway and adequate hydration should be employed. Motor Restlessness: Symptoms may include agitation or jitteriness and sometimes insomnia. These symptoms often disappear spontaneously. At times these symptoms may be similar to the original neurotic or psychotic symptoms. Dosage should not be increased until these side effects have subsided. If these symptoms become too troublesome, they can usually be controlled by a reduction of dosage or change of drug. Treatment with anti-parkinsonian agents, benzodiazepines or propranolol may be helpful. Dystonia: Class effect: Symptoms of dystonia, prolonged abnormal contractions of muscle groups, may occur in susceptible individuals during the first few days of treatment. Dystonic symptoms include: spasm of the neck muscles, sometimes progressing to tightness of the throat, swallowing difficulty, difficulty breathing, and/or protrusion of the tongue. While these symptoms can occur at low doses, they occur more frequently and with greater severity with high potency and at higher doses of first generation antipsychotic drugs. An elevated risk of acute dystonia is observed in males and younger age groups. Pseudo-parkinsonism: Symptoms may include: mask-like facies; drooling; tremors; pillrolling motion; cogwheel rigidity; and shuffling gait. Reassurance and sedation are important. In most cases these symptoms are readily controlled when an anti-parkinsonism agent is administered concomitantly. Anti-parkinsonism agents should be used only when required. Generally, therapy of a few weeks to 2 or 3 months will suffice. After this time patients should be evaluated to determine their need for continued treatment. (Note: Levodopa has not been found effective in pseudo-parkinsonism.) Occasionally it is necessary to lower the dosage of prochlorperazine or to discontinue the drug. Tardive Dyskinesia: As with all antipsychotic agents, tardive dyskinesia may appear in some patients on long-term therapy or may appear after drug therapy has been discontinued. The syndrome can also develop, although much less frequently, after relatively brief treatment periods at low doses. This syndrome appears in all age groups. Although its prevalence appears to be highest among elderly patients, especially elderly women, it is impossible to rely upon prevalence estimates to predict at the inception of neuroleptic treatment which patients are likely to develop the syndrome. The symptoms are persistent and in so …

Description

openFDA Drug Labeling

DESCRIPTION Prochlorperazine, a phenothiazine derivative, is designated chemically as 2-Chloro -10-[3-(4-methyl-1-piperazinyl)propyl]phenothiazine with the following structural formula: Each suppository, for rectal administration, contains 25 mg of prochlorperazine; with glycerin, glyceryl monopalmitate, glyceryl monostearate, hydrogenated coconut oil fatty acids and hydrogenated palm kernel oil fatty acids. chemical-structure

OVERDOSAGE (See also ADVERSE REACTIONS ). SYMPTOMS–Primarily involvement of the extrapyramidal mechanism producing some of the dystonic reactions described above. Symptoms of central nervous system depression to the point of somnolence or coma. Agitation and restlessness may also occur. Other possible manifestations include convulsions, EKG changes and cardiac arrhythmias, fever and autonomic reactions such as hypotension, dry mouth and ileus. TREATMENT–It is important to determine other medications taken by the patient since multiple-dose therapy is common in overdosage situations. Treatment is essentially symptomatic and supportive. Early gastric lavage is helpful. Keep patient under observation and maintain an open airway, since involvement of the extrapyramidal mechanism may produce dysphagia and respiratory difficulty in severe overdosage. Do not attempt to induce emesis because a dystonic reaction of the head or neck may develop that could result in aspiration of vomitus. Extrapyramidal symptoms may be treated with anti-parkinsonism drugs, barbiturates or diphenhydramine. See prescribing information for these products. Care should be taken to avoid increasing respiratory depression. If administration of a stimulant is desirable, amphetamine, dextroamphetamine or caffeine with sodium benzoate is recommended. Stimulants that may cause convulsions (e.g., picrotoxin or pentylenetetrazol) should be avoided. If hypotension occurs, the standard measures for managing circulatory shock should be initiated. If it is desirable to administer a vasoconstrictor, norepinephrine bitartrate and phenylephrine hydrochloride are most suitable. Other pressor agents, including epinephrine, are not recommended because phenothiazine derivatives may reverse the usual elevating action of these agents and cause a further lowering of blood pressure. Limited experience indicates that phenothiazines are not dialyzable.

How Supplied / Storage and Handling

openFDA Drug Labeling

HOW SUPPLIED Compro ® Prochlorperazine Suppositories USP, 25 mg (for adults) are easy to open, and available in boxes of 12. 12's - NDC 0574-7226-12 Store at 20° to 25°C (68° to 77°F) [See USP Controlled Room Temperature]. Do not remove from wrapper until ready to use. Manufactured By Padagis Minneapolis, MN 55427 www.padagis.com Rev 11-24

Adverse event reports

Source: openFDA FAERS
37,667
FAERS reports mentioning this drug
as of 2026-09-25T03:42:24+00:00
A report count is not a risk measure. FAERS accepts voluntary and mandatory reports without establishing causation, and reporting is influenced by how widely a drug is used, how long it has been marketed, and media attention. FDA states that reports “do not prove that the drug caused the event”. Compare rates, not totals.

Attributed to this product's most-reported active ingredient: PROCHLORPERAZINE. Combination products with more than six active ingredients are not attributed, because a report count summed across a long ingredient list measures the list, not the medicine.

Packaging and NDCs

Source: NDC Directory
Every National Drug Code package associated with this medication. The NDC is the identifier used for dispensing, billing and pharmacovigilance in the United States.
Package NDC Product NDC Labeler Description Marketing start
55289-119-02 55289-119 PD-Rx Pharmaceuticals, Inc. 2 SUPPOSITORY in 1 BOTTLE, PLASTIC (55289-119-02) December 22, 2010
55289-119-06 55289-119 PD-Rx Pharmaceuticals, Inc. 6 SUPPOSITORY in 1 BOTTLE, PLASTIC (55289-119-06) January 18, 2023
0574-7226-12 0574-7226 Padagis US LLC 12 PACKET in 1 CARTON (0574-7226-12) / 1 SUPPOSITORY in 1 PACKET September 1, 2000
55289-119 55289-119 PD-Rx Pharmaceuticals, Inc. — September 1, 2000
0574-7226 0574-7226 Padagis US LLC — September 1, 2000

Sources for this page

Every dataset that contributed a fact to this page.
Dataset Agency Used for
NDC Directory FDA Identity, ingredients, strengths, forms, routes, labelers, packages
Drugs@FDA FDA Application, sponsor, submissions, review documents, marketing status
Orange Book FDA Therapeutic equivalence codes, reference drug flags, patents, exclusivity
Drug Labeling FDA / NLM Prescribing information reproduced above
FAERS FDA Adverse event report counts

Generated September 25, 2026 · 11 sections on this page.