You're using a free limited version of DrugPatentWatch: Upgrade for Complete Access

Last Updated: April 3, 2025

CLINICAL TRIALS PROFILE FOR PROZAC WEEKLY


✉ Email this page to a colleague

« Back to Dashboard


505(b)(2) Clinical Trials for PROZAC WEEKLY

This table shows clinical trials for potential 505(b)(2) applications. See the next table for all clinical trials
Trial TypeTrial IDTitleStatusSponsorPhaseStart DateSummary
OTC NCT03228732 ↗ The Effects of Fluoxetine and/or DHEA Recruiting University of Maryland Early Phase 1 2017-12-19 (1) To determine how the Selective Serotonin Reuptake Inhibitor (SSRI), fluoxetine (Prozac), an antidepressant often used to treat depression, stimulates the participant's body's ability to defend against low blood sugar (hypoglycemia). (2) To learn how a hormone, dehydroepiandrosterone (DHEA), stimulates the participant's body's ability to defend itself from low blood sugar (hypoglycemia). DHEA is a hormone produced naturally in the human body. However, it can be manufactured and is sold as an over-the-counter dietary supplement. The dose the investigators are giving in this study is higher than the usual recommended dosage taken as a supplement for certain medical conditions. (3) To study combined effects of fluoxetine and DHEA during low blood glucose. In the present study, the investigators will measure the participant's body's responses to hypoglycemia when given fluoxetine or DHEA or fluoxetine and DHEA or a placebo (a pill with no fluoxetine or DHEA). Approximately 64 individuals with type 1 diabetes will take part in this study.
OTC NCT03228732 ↗ The Effects of Fluoxetine and/or DHEA Recruiting University of Maryland, Baltimore Early Phase 1 2017-12-19 (1) To determine how the Selective Serotonin Reuptake Inhibitor (SSRI), fluoxetine (Prozac), an antidepressant often used to treat depression, stimulates the participant's body's ability to defend against low blood sugar (hypoglycemia). (2) To learn how a hormone, dehydroepiandrosterone (DHEA), stimulates the participant's body's ability to defend itself from low blood sugar (hypoglycemia). DHEA is a hormone produced naturally in the human body. However, it can be manufactured and is sold as an over-the-counter dietary supplement. The dose the investigators are giving in this study is higher than the usual recommended dosage taken as a supplement for certain medical conditions. (3) To study combined effects of fluoxetine and DHEA during low blood glucose. In the present study, the investigators will measure the participant's body's responses to hypoglycemia when given fluoxetine or DHEA or fluoxetine and DHEA or a placebo (a pill with no fluoxetine or DHEA). Approximately 64 individuals with type 1 diabetes will take part in this study.
>Trial Type>Trial ID>Title>Status>Phase>Start Date>Summary
Showing 1 to 2 of 2 entries

All Clinical Trials for PROZAC WEEKLY

Trial IDTitleStatusSponsorPhaseStart DateSummary
NCT00011765 ↗ Effect of Fluoxetine (Prozac) on Domestic Violence Completed National Institute on Alcohol Abuse and Alcoholism (NIAAA) Phase 2 2001-02-22 This study will evaluate whether fluoxetine (Prozac), used together with traditional psychotherapy, can reduce aggression in people who are physically violent towards their spouses or significant others. Treatment for domestic violence has centered on behavioral therapies, such as anger management and self-control exercises. Recent studies have shown that fluoxetine-a drug commonly used to treat depression and panic disorder-can decrease acts of aggression. Men and women between the ages of 18 and 65 who have a history of inflicting physical aggression on a spouses or significant others in the past year (with at least one episode occurring not under the influence of alcohol) may be eligible for this study. Participants spouses or significant others will also be asked to participate. All potential participants will be screened with a medical and psychiatric evaluation and history, breath alcohol analysis, blood tests, urine drug screen and electrocardiogram. Those enrolled will undergo the following procedures: Perpetrator - Interview and questionnaires - Participants will be interviewed by a social worker about past and current mental health and use of alcohol and illicit drugs and will complete questionnaires assessing emotional state and personality, depression, anxiety, aggression and alcohol consumption. Some of the questionnaires will be repeated at monthly intervals. - Physical performance testing - Performance and speed will be measured in three separate training sessions that involve repeatedly pressing a button on a button box console, earning points worth money. - Dyadic interaction paradigm - Participants will interact with their spouse/significant other in a small room, first discussing a neutral topic, such as the day's events, and then a subject that has been a source of conflict. - Fluoxetine administration - Participants will be randomly assigned to receive either 10 mg. of fluoxetine or placebo (identical capsules with no active ingredients) once a day for 3 days, then twice a day, increasing up to four capsules a day if there are no serious side effects. Blood will be drawn once a month to measure drug levels. At the end of 3 months, participants taking placebo may remain in the study and receive fluoxetine. - Clinic visits - Participants are followed in the clinic weekly for the first month, then twice a month for the next 2 months for adjustment of number of pills, evaluation of aggressive behavior and alcohol consumption, and therapy for issues of self-esteem, anger management and communication skills. Couples therapy aimed at conflict resolution and improving communication skills will be offered. - Genetic tests (optional) - Blood will be drawn to determine if there is a relationship between genes involved in a chemical process (serotonin reuptake) that is influenced by fluoxetine and the participant's response to the drug. Spouse/Significant other: Spouses/significant others will complete several questionnaires once a month (total 4 times) to rate their partners' behavior while in the study. They will also participate in the dyadic interaction paradigm described above at the beginning and end of the study.
NCT00006204 ↗ Drug Treatment for Depressed Alcoholics (Naltrexone/Fluoxetine) Completed National Institute on Alcohol Abuse and Alcoholism (NIAAA) Phase 4 2000-03-01 This study will examine the effects of combing naltrexone and fluoxetine (Prozac) versus fluoxetine and placebo in alcoholics with co-occurring major depression. Both groups will actively participate in the 6-month study, which includes weekly individual Dual Disorders Recovery Counseling during the first month and every two weeks during the second through sixth months, plus the naltrexone and fluoxetine or fluoxetine and placebo. Subjects will complete follow-up assessments at 9 and 12 months.
NCT00006286 ↗ Treatment for Adolescents With Depression Study (TADS) Completed National Institute of Mental Health (NIMH) Phase 3 1998-09-01 TADS is designed to compare the effectiveness of established treatments for teenagers suffering from major depressive disorder (MDD). The treatments are: psychotherapy ("talking therapy"); medication; and the combination of psychotherapy and medication. Altogether, 432 teenagers (both males and females) ages 12 to 17, will take part in this study at 12 sites in the United States. The TADS design will provide answers to the following questions: What is the long-term effectiveness of medication treatment of teenagers who have major depression? What is the long-term effectiveness of a specific psychotherapy ("talking therapy) in the treatment of teenagers who have major depression? How does medication treatment compare with psychotherapy in terms of effectiveness, tolerability and teenager and family acceptance? And, What is the cost-effectiveness of medication, psychotherapy and combined treatments? The medication being used in this study is called fluoxetine. Fluoxetine is also known as Prozac. Research has shown that medications like Prozac help depression in young persons. Fluoxetine has been approved by the FDA for use in the treatment of child and adolescent (ages 7 to 17 years) depression. The psychotherapy or "talking therapy" being used in this study is called Cognitive Behavioral Therapy (CBT). CBT is a talking therapy that will teach both the teenager and his or her family member (e.g., parent) new skills to cope better with depression. Specific topics include education about depression and the causes of depression, setting goals, monitoring mood, increasing pleasant activities, social problem-solving, correcting negative thinking, negotiation, compromise and assertiveness. CBT sessions may also help with resolving disagreements as they affect families.
NCT00005015 ↗ Treatment of Depression in Youth With Bipolar Disorders Terminated National Institute of Mental Health (NIMH) Phase 3 1969-12-31 THIS STUDY HAS BEEN DISCONTINUED. The study is designed to evaluate the safety and efficacy of fluoxetine for treating children and adolescents with Bipolar Disorder who are experiencing an episode of major depression while being treated with a mood stabilizer. The study involves a 2-week assessment period. Patients who are on stable, therapeutic doses of lithium or valproate and continue to have depression will be randomized to a 12-week treatment of fluoxetine or placebo. Those who respond favorably to treatment will be followed openly for an 18-week continuation phase.
>Trial ID>Title>Status>Phase>Start Date>Summary
Showing 1 to 4 of 4 entries

Clinical Trial Conditions for PROZAC WEEKLY

Condition Name

2317760-2024681012141618202224DepressionMajor Depressive DisorderHealthyMajor Depression[disabled in preview]
Condition Name for PROZAC WEEKLY
Intervention Trials
Depression 23
Major Depressive Disorder 17
Healthy 7
Major Depression 6
[disabled in preview] 0
This preview shows a limited data set
Subscribe for full access, or try a Trial

Condition MeSH

5647302800102030405060DepressionDepressive DisorderDiseaseDepressive Disorder, Major[disabled in preview]
Condition MeSH for PROZAC WEEKLY
Intervention Trials
Depression 56
Depressive Disorder 47
Disease 30
Depressive Disorder, Major 28
[disabled in preview] 0
This preview shows a limited data set
Subscribe for full access, or try a Trial

Clinical Trial Locations for PROZAC WEEKLY

Trials by Country

+
Trials by Country for PROZAC WEEKLY
Location Trials
United States 256
Canada 11
China 7
France 3
India 3
This preview shows a limited data set
Subscribe for full access, or try a Trial

Trials by US State

+
Trials by US State for PROZAC WEEKLY
Location Trials
New York 20
Pennsylvania 16
California 15
Texas 14
Maryland 11
This preview shows a limited data set
Subscribe for full access, or try a Trial

Clinical Trial Progress for PROZAC WEEKLY

Clinical Trial Phase

39.1%29.0%29.0%00510152025Phase 4Phase 3Phase 2/Phase 3[disabled in preview]
Clinical Trial Phase for PROZAC WEEKLY
Clinical Trial Phase Trials
Phase 4 27
Phase 3 20
Phase 2/Phase 3 2
[disabled in preview] 20
This preview shows a limited data set
Subscribe for full access, or try a Trial

Clinical Trial Status

76.2%9.5%8.6%5.7%001020304050607080CompletedRecruitingTerminated[disabled in preview]
Clinical Trial Status for PROZAC WEEKLY
Clinical Trial Phase Trials
Completed 80
Recruiting 10
Terminated 9
[disabled in preview] 6
This preview shows a limited data set
Subscribe for full access, or try a Trial

Clinical Trial Sponsors for PROZAC WEEKLY

Sponsor Name

trials02468101214161820222426National Institute of Mental Health (NIMH)Eli Lilly and CompanyUniversity of Pittsburgh[disabled in preview]
Sponsor Name for PROZAC WEEKLY
Sponsor Trials
National Institute of Mental Health (NIMH) 24
Eli Lilly and Company 6
University of Pittsburgh 6
[disabled in preview] 5
This preview shows a limited data set
Subscribe for full access, or try a Trial

Sponsor Type

67.9%16.3%12.4%0020406080100120140OtherNIHIndustry[disabled in preview]
Sponsor Type for PROZAC WEEKLY
Sponsor Trials
Other 142
NIH 34
Industry 26
[disabled in preview] 7
This preview shows a limited data set
Subscribe for full access, or try a Trial

PROZAC Weekly: Clinical Trials, Market Analysis, and Projections

Introduction

Prozac Weekly, the once-weekly formulation of fluoxetine, has been a significant player in the antidepressant market since its introduction. This article will delve into the clinical trials that have established its efficacy, analyze its market position, and provide projections for its future in the pharmaceutical industry.

Clinical Trials Overview

Efficacy in Major Depressive Disorder (MDD)

Clinical trials have consistently shown that Prozac Weekly is effective in the treatment of Major Depressive Disorder. In a study involving adult outpatients who had responded to an initial 13 weeks of open-label treatment with Prozac 20 mg/day, patients were randomized to continuation treatment with Prozac Weekly, Prozac 20 mg/day, or placebo. The results indicated that both Prozac Weekly and Prozac 20 mg/day demonstrated superior efficacy compared to placebo in delaying the relapse of depressive symptoms over a 25-week period[4][5].

Efficacy in Pediatric Patients

Prozac has also been studied in pediatric patients for the treatment of MDD. Two 8- to 9-week placebo-controlled clinical trials involving children and adolescents showed that Prozac 20 mg/day produced a statistically significant greater mean change on the Childhood Depression Rating Scale-Revised (CDRS-R) total score from baseline to endpoint compared to placebo. This efficacy was observed without any differential responsiveness based on age or gender[1][4].

Efficacy in Obsessive Compulsive Disorder (OCD)

In addition to MDD, Prozac has been evaluated for its effectiveness in OCD. A 13-week clinical trial in pediatric patients with OCD demonstrated that Prozac, adjusted in the range of 20 to 60 mg/day, produced a statistically significant greater mean change from baseline to endpoint on the Children’s Yale-Brown Obsessive Compulsive Scale (CY-BOCS) compared to placebo[1].

Efficacy in Bulimia Nervosa

Prozac Weekly has also shown efficacy in the treatment of bulimia nervosa. Studies involving adult outpatients with moderate to severe bulimia nervosa showed that Prozac 60 mg/day, but not 20 mg/day, was statistically significantly superior to placebo in reducing the number of binge-eating and vomiting episodes per week[1][4].

Pharmacokinetics and Dosing

Weekly vs. Daily Dosing

Prozac Weekly is designed to be taken once a week, which results in increased fluctuation between peak and trough concentrations of fluoxetine and its metabolite, norfluoxetine, compared to daily dosing. However, peak concentrations from once-weekly doses are within the range of the average concentration for 20-mg once-daily dosing[4].

Initiation and Maintenance

The recommended initiation of Prozac Weekly involves switching from daily Prozac 20 mg after 7 days. If a satisfactory response is not maintained with Prozac Weekly, reestablishing a daily dosing regimen is recommended[5].

Market Analysis

Market Position

Prozac Weekly was introduced as a strategy by Eli Lilly to maintain market share as the original Prozac patent expired. The once-weekly formulation was marketed to patients already on daily Prozac and those on other antidepressants, aiming to capitalize on the convenience of less frequent dosing[2].

Marketing Controversies

The launch of Prozac Weekly was not without controversy. A notable marketing scheme involved sending unsolicited packages of Prozac Weekly to patients, which raised ethical concerns about patient targeting and the involvement of doctors and pharmacies in such practices[2].

Competitive Landscape

The antidepressant market is highly competitive, with numerous generic and branded options available. Prozac Weekly competes with other selective serotonin reuptake inhibitors (SSRIs) and newer antidepressants. However, its once-weekly dosing regimen offers a unique selling point that can attract patients seeking convenience and improved adherence to treatment[5].

Safety and Tolerability

Adverse Effects

Clinical trials have shown that Prozac Weekly is generally well tolerated. Common adverse effects include impaired concentration and nervousness, which are observed at rates similar to or slightly higher than those seen with daily dosing. However, these effects are not significantly different from those experienced by patients on placebo[3][4].

Discontinuation Rates

Studies have indicated that the rate of treatment discontinuations due to adverse events does not differ significantly between Prozac Weekly and placebo. This suggests that Prozac Weekly maintains a favorable safety profile comparable to its daily counterpart[1][4].

Projections and Future Outlook

Market Trends

The demand for antidepressants is expected to continue growing due to increasing awareness and reduced stigma around mental health issues. The convenience of once-weekly dosing could make Prozac Weekly an attractive option for patients and healthcare providers, potentially sustaining its market presence despite generic competition.

Regulatory Environment

As patents for branded antidepressants expire, the regulatory environment becomes more favorable for generic entries. However, Prozac Weekly's unique dosing regimen may help it maintain a niche in the market, especially if it continues to demonstrate efficacy and safety in long-term studies.

Patient Adherence

One of the key projections for Prozac Weekly is its potential to improve patient adherence. The once-weekly dosing schedule can simplify treatment regimens, reducing the likelihood of missed doses and enhancing overall treatment outcomes.

Key Takeaways

  • Efficacy: Prozac Weekly has demonstrated efficacy in treating MDD, OCD, and bulimia nervosa, with results comparable to or superior to those of daily Prozac.
  • Pharmacokinetics: The once-weekly dosing results in fluctuating plasma concentrations but maintains therapeutic efficacy.
  • Market Position: Prozac Weekly competes in a crowded antidepressant market but offers a unique selling point with its convenience.
  • Safety: Generally well tolerated with adverse effects similar to those of daily Prozac.
  • Projections: Expected to maintain market presence due to its convenience and potential for improved patient adherence.

FAQs

Q: What is the primary advantage of Prozac Weekly over daily Prozac?

A: The primary advantage is the convenience of once-weekly dosing, which can improve patient adherence.

Q: Is Prozac Weekly effective in treating pediatric patients?

A: Yes, clinical trials have shown that Prozac is effective in treating MDD in pediatric patients, with no differential responsiveness based on age or gender.

Q: How does the pharmacokinetics of Prozac Weekly compare to daily Prozac?

A: Prozac Weekly results in increased fluctuation between peak and trough concentrations but maintains therapeutic efficacy within the range of daily dosing.

Q: What were the controversies surrounding the launch of Prozac Weekly?

A: The launch involved a marketing scheme where unsolicited packages of Prozac Weekly were sent to patients, raising ethical concerns.

Q: What is the projected future outlook for Prozac Weekly in the market?

A: It is expected to maintain its market presence due to its unique dosing regimen and potential for improved patient adherence.

Sources

  1. PROZAC - accessdata.fda.gov [PDF]
  2. Pitching Prozac - CBS News
  3. The Efficacy and Safety of Fluoxetine Delayed-Release 90 mg ... - brieflands.com
  4. PROZAC - accessdata.fda.gov [PDF]
  5. Prozac and Prozac Weekly (fluoxetine HCl) - accessdata.fda.gov [PDF]

More… ↓

⤷  Try for Free

Make Better Decisions: Try a trial or see plans & pricing

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.