Fastin

Caloric Restriction, Obesity, Type 2 Diabetes + 6 more

Treatment

3 FDA approvals

20 Active Studies for Fastin

What is Fastin

Phentermine

The Generic name of this drug

Treatment Summary

Phentermine is a drug used to control weight, and it was first introduced in 1959. It is related to, but not as strong as amphetamines and is classified as a Schedule IV drug, meaning it has a low potential for abuse. Phentermine was initially available as part of a combination drug with other medications, but later it was approved on its own. In 2012, a new combination of phentermine with topiramate was approved, which requires lower doses of phentermine to be effective.

Ionamin

is the brand name

image of different drug pills on a surface

Fastin Overview & Background

Brand Name

Generic Name

First FDA Approval

How many FDA approvals?

Ionamin

Phentermine

1959

298

Approved as Treatment by the FDA

Phentermine, also known as Ionamin, is approved by the FDA for 3 uses including Obesity and Comorbidity .

Obesity

Used to treat Obesity in combination with Topiramate

Comorbidity

Used to treat one related comorbidity in combination with Topiramate

Regime of weight reduction

Effectiveness

How Fastin Affects Patients

Phentermine works by suppressing appetite and increasing the amount of energy the body uses while resting. Clinical studies show that people taking phentermine lose an average of 3.6 kilograms in 2-24 weeks compared to those taking a placebo. Even after treatment ends, patients tend to keep the weight off. Phentermine is related to amphetamines, but does not have any of the same stimulating or dangerous effects, like high blood pressure or an irregular heartbeat.

How Fastin works in the body

Phentermine works by increasing the amount of a chemical called noradrenaline in the brain. Noradrenaline is a kind of hormone that triggers a “fight or flight” response, which suppresses the feeling of hunger and reduces the need for energy. It also has an indirect effect on serotonin, another hormone that helps regulate appetite. Additionally, it is thought that phentermine may inhibit a chemical called neuropeptide Y, which is involved in hunger signals. Finally, it is a weak inhibitor of monoamine oxidase, which may contribute to its effects.

When to interrupt dosage

The recommended dosage of Fastin hinges on the diagnosed circumstance, including Regime of weight reduction, Hyperlipidemia and Type 2 Diabetes. The measure of dosage is contingent upon the technique of administration (e.g. Oral or Tablet) mentioned in the table underneath.

Condition

Dosage

Administration

Obesity

, 30.0 mg, 15.0 mg, 37.5 mg, 3.75 mg, 7.5 mg, 11.25 mg, 8.0 mg, 18.8 mg

Oral, , Capsule, Capsule - Oral, Capsule, extended release - Oral, Capsule, extended release, Tablet - Oral, Tablet, Tablet, orally disintegrating - Oral, Tablet, orally disintegrating

Caloric Restriction

, 30.0 mg, 15.0 mg, 37.5 mg, 3.75 mg, 7.5 mg, 11.25 mg, 8.0 mg, 18.8 mg

Oral, , Capsule, Capsule - Oral, Capsule, extended release - Oral, Capsule, extended release, Tablet - Oral, Tablet, Tablet, orally disintegrating - Oral, Tablet, orally disintegrating

Type 2 Diabetes

, 30.0 mg, 15.0 mg, 37.5 mg, 3.75 mg, 7.5 mg, 11.25 mg, 8.0 mg, 18.8 mg

Oral, , Capsule, Capsule - Oral, Capsule, extended release - Oral, Capsule, extended release, Tablet - Oral, Tablet, Tablet, orally disintegrating - Oral, Tablet, orally disintegrating

Hypertensive disease

, 30.0 mg, 15.0 mg, 37.5 mg, 3.75 mg, 7.5 mg, 11.25 mg, 8.0 mg, 18.8 mg

Oral, , Capsule, Capsule - Oral, Capsule, extended release - Oral, Capsule, extended release, Tablet - Oral, Tablet, Tablet, orally disintegrating - Oral, Tablet, orally disintegrating

High Cholesterol

, 30.0 mg, 15.0 mg, 37.5 mg, 3.75 mg, 7.5 mg, 11.25 mg, 8.0 mg, 18.8 mg

Oral, , Capsule, Capsule - Oral, Capsule, extended release - Oral, Capsule, extended release, Tablet - Oral, Tablet, Tablet, orally disintegrating - Oral, Tablet, orally disintegrating

Regime of weight reduction

, 30.0 mg, 15.0 mg, 37.5 mg, 3.75 mg, 7.5 mg, 11.25 mg, 8.0 mg, 18.8 mg

Oral, , Capsule, Capsule - Oral, Capsule, extended release - Oral, Capsule, extended release, Tablet - Oral, Tablet, Tablet, orally disintegrating - Oral, Tablet, orally disintegrating

Chronic Weight Management therapy

, 30.0 mg, 15.0 mg, 37.5 mg, 3.75 mg, 7.5 mg, 11.25 mg, 8.0 mg, 18.8 mg

Oral, , Capsule, Capsule - Oral, Capsule, extended release - Oral, Capsule, extended release, Tablet - Oral, Tablet, Tablet, orally disintegrating - Oral, Tablet, orally disintegrating

increase in physical activity

, 30.0 mg, 15.0 mg, 37.5 mg, 3.75 mg, 7.5 mg, 11.25 mg, 8.0 mg, 18.8 mg

Oral, , Capsule, Capsule - Oral, Capsule, extended release - Oral, Capsule, extended release, Tablet - Oral, Tablet, Tablet, orally disintegrating - Oral, Tablet, orally disintegrating

Comorbidity

, 30.0 mg, 15.0 mg, 37.5 mg, 3.75 mg, 7.5 mg, 11.25 mg, 8.0 mg, 18.8 mg

Oral, , Capsule, Capsule - Oral, Capsule, extended release - Oral, Capsule, extended release, Tablet - Oral, Tablet, Tablet, orally disintegrating - Oral, Tablet, orally disintegrating

Warnings

Fastin Contraindications

Condition

Risk Level

Notes

Hyperthyroidism

Do Not Combine

concomitant use or 14 days after discontinuation

Do Not Combine

Agitation

Do Not Combine

Drug abuse

Do Not Combine

Cardiovascular Diseases

Do Not Combine

Open-angle glaucoma

Do Not Combine

Severe Hypersensitivity Reactions

Do Not Combine

Phentermine may interact with Pulse Frequency

There are 20 known major drug interactions with Fastin.

Common Fastin Drug Interactions

Drug Name

Risk Level

Description

Iobenguane

Major

Phentermine can cause a decrease in the absorption of Iobenguane resulting in a reduced serum concentration and potentially a decrease in efficacy.

Methylene blue

Major

Phentermine may increase the serotonergic activities of Methylene blue.

Mirtazapine

Major

Phentermine may increase the serotonergic activities of Mirtazapine.

1-benzylimidazole

Minor

The therapeutic efficacy of 1-benzylimidazole can be decreased when used in combination with Phentermine.

4-Methoxyamphetamine

Minor

The risk or severity of hypertension can be increased when Phentermine is combined with 4-Methoxyamphetamine.

Fastin Toxicity & Overdose Risk

The toxic dose of phentermine in rats is reported to be 151 mg/kg. Overdosing on this drug can cause restlessness, tremors, confusion, hallucinations, fatigue, depression, fast heartbeat, arrhythmias, high or low blood pressure, nausea, vomiting, diarrhea, abdominal cramps, skin problems, insomnia, irritability, hyperactivity, and changes in personality. In severe cases, this can lead to a psychosis-like state. Studies have not been done to determine if phentermine causes cancer or mutations.

image of a doctor in a lab doing drug, clinical research

Fastin Novel Uses: Which Conditions Have a Clinical Trial Featuring Fastin?

104 active clinical trials are currently being conducted to assess the value of Fastin in the management of Type 2 Diabetes, Weight Loss Regime and Disease.

Condition

Clinical Trials

Trial Phases

Type 2 Diabetes

89 Actively Recruiting

Phase 1, Phase 2, Not Applicable, Phase 3, Phase 4, Early Phase 1

Obesity

0 Actively Recruiting

Hypertensive disease

0 Actively Recruiting

Comorbidity

0 Actively Recruiting

High Cholesterol

19 Actively Recruiting

Phase 2, Phase 3, Not Applicable, Early Phase 1

Caloric Restriction

0 Actively Recruiting

Regime of weight reduction

0 Actively Recruiting

increase in physical activity

0 Actively Recruiting

Chronic Weight Management therapy

0 Actively Recruiting

Fastin Reviews: What are patients saying about Fastin?

5

Patient Review

6/6/2010

Fastin for Overweight

I had way more energy and didn't crave food as much. I lost 36 pounds in 3 months, but gained it all back after stopping the treatment. It's really effective, but made me dizzy and not want to eat at first.

5

Patient Review

6/17/2011

Fastin for Overweight

I do not recommend this drug, especially for those who are under the age of 18. I experienced an abnormal heart rate, shakes, and hallucinations.

5

Patient Review

9/1/2010

Fastin for Overweight

I initially lost 75 pounds and have been able to keep off 60 of those pounds for over a year now.

5

Patient Review

2/23/2011

Fastin for Overweight

This treatment has helped me a lot. I feel much more motivated and clearheaded now.

5

Patient Review

8/9/2009

Fastin for Overweight

5

Patient Review

9/10/2009

Fastin for Overweight

5

Patient Review

9/10/2009

Fastin for Overweight

5

Patient Review

10/15/2009

Fastin for Overweight

4.7

Patient Review

12/17/2009

Fastin for Overweight

I have been on fasten for two weeks- already lost 8 pounds with no noticeable side effects (just a little dry mouth, but that's easy to fix with water). This drug is wonderful- my goal is to lose 50 pounds and I'm confident that I'll reach it. I also used to have CFS but not anymore! I can stay awake to watch a movie now, which makes me so happy.

4.7

Patient Review

2/13/2010

Fastin for Overweight

I started taking this medication at the end of August and have since lost 30 pounds. I've been feeling really energetic and motivated to exercise, which has been great!

4.3

Patient Review

6/22/2011

Fastin for Overweight

I haven't been taking this pill every day as recommended because I get really hungry when I do. Even just taking it 2-3 days in a row makes me ravenous. There are no side effects that I've noticed, which is great, but the hunger is hard to manage. So far I've only been taking it 3 days a week and eating fruit during the day, plus a meal when I get home. In three weeks I've lost at least 8lbs. Does anyone have any suggestions or know if it would work better if taken everyday?

4

Patient Review

8/6/2009

Fastin for Overweight

3.7

Patient Review

11/17/2011

Fastin for Overweight

This medication was effective in reducing my appetite. However, I also experienced an embarrassing side effect that I have not seen listed anywhere else: an inability to urinate. This happened regardless of how much fluids I consumed or how long I waited. If anyone else has had this problem, please let me know.

2.7

Patient Review

5/29/2010

Fastin for Overweight

I saw the best results when I remembered to take this medication on an empty stomach, though after a few months the effectiveness decreased. The time-released capsules were especially helpful.
image of drug pills surrounding a glass of water symbolizing drug consumption

Patient Q&A Section about fastin

These questions and answers are submitted by anonymous patients, and have not been verified by our internal team.

Is phentermine and fastin the same thing?

"Phentermine is an appetite suppressant that is used as a short-term weight loss aid.

The drug Fastin was once a brand name of phentermine, which was manufactured by King Pharmaceuticals. Phentermine is an appetite suppressant that is used to help with short-term weight loss."

Answered by AI

What does fastin mean?

"It is called "diet pills" because it makes dieting easier by suppressing the appetite.

Amphetamines and other psychoactive drugs that help with weight loss by suppressing appetite are colloquially known as "diet pills.""

Answered by AI

What are fastin pills?

"An prescription medication, Fastin, is available to help treat Obesity. Fastin can be used by itself or in combination with other drugs. Classified as a CNS Stimulant, Anorexiant, and Stimulant, Fastin works by affecting the levels of certain neurotransmitters in the brain."

Answered by AI

Is the drug fastin still available?

"Fastin, a brand name drug, is no longer available in the United States. The generic version of the drug is still available, however."

Answered by AI

Clinical Trials for Fastin

Image of National Institutes of Health Clinical Center in Bethesda, United States.

Meal Macronutrients for Blood Fat Levels

18 - 120
All Sexes
Bethesda, MD

Background: Abnormal fats in the blood can lead to many problems, including heart disease. Researchers want to learn more about how eating meals with different levels of nutrients affects fats in the blood. Specifically, they want to study people with too much body fat, too little body fat, and a kidney problem called nephrotic syndrome. Objective: To learn more about how different types of foods affect fat levels in the blood. Eligibility: People aged 18 years or older with a health condition that affects how their body handles fats. Healthy volunteers are also needed. Design: Participants will have 2 overnight stays in the clinic within 6 months. At each visit, after staying overnight, they will eat a breakfast casserole. At 1 visit, breakfast will be a high-fat, low carbohydrate meal. At the other, it will be a high-carbohydrate, low-fat meal. Participants will have a tube inserted into a vein in their arm. They will have blood drawn via the tube 12 times in 8 hours: 2 times before they eat the breakfast and 10 times after. Participants will have other tests during their stays: * A resting metabolic test captures the air they exhale and measures how much energy they use at rest. * A dual energy X-ray absorptiometry (DXA) scan measures how much fat and muscle they have. * A Fibroscan is a special type of ultrasound of the liver. * A body surface scan uses lasers to measure the total area of the body. * A bioelectric impedance (BIS) exam measures how fast small electric currents move through their body. Participants may opt to have a third visit. At this visit, the breakfast will be high in protein.

Phase 2
Waitlist Available

National Institutes of Health Clinical Center

Rebecca J Brown, M.D.

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Composite Intervention for Metabolic Syndrome

18+
All Sexes
Indianapolis, IN

The objective of this study is to pilot a multifaceted, optimized intervention for metabolic syndrome (MetS) in emergency department patients to establish feasibility. Participants (n=20) will be randomized to intervention or control (usual care). The composite intervention will include an educational video outlining the adverse effects of MetS and the benefit of walking, a written exercise prescription with a defined goal of walking 150 minutes per week, a Fitbit accelerometer device, resources for healthy eating practices, periodic text message reminders, and an urgent referral to primary care and our health system's Healthy Me clinic for follow-up visit. Investigators hypothesize that this approach will change patient understanding and motivation to increase physical activity and healthy eating habits.

Recruiting
Has No Placebo

Sidney & Lois Eskenazi Hospital

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Sisters of Heart for Improving Heart Health

18 - 45
Female
Ellenton, GA

The goal of this hybrid Type 1 effectiveness-implementation trial is to test the extent to which a peer support and community resource navigation intervention improves psychological well-being, addresses social determinants of health and thus reduces cardiometabolic risk among rural, migrant, low-income farmworker women aged 18-45 years. The main questions it aims to answer are: * If and to what extent does the intervention reduce stress, social isolation, and psychological distress by improving social support and access to needed resources? * If and to what extent does the intervention improve cardiometabolic health, measured by the American Heart Association's Life's Essential 8 (LE8) score? Researchers will compare the CHW-led Sisters of Heart (Hermanas de Corazón) intervention to a Basic intervention (LE8 assessment and resource information) to assess the effect of peer support and community resource navigation on heart health outcomes.

Recruiting
Has No Placebo

Southern GA - Colquitt County

Erin Ferranti, PhD

Image of Pennington Biomedical Research Center in Baton Rouge, United States.

Continuous Glucose Monitoring for Diabetes

20 - 60
All Sexes
Baton Rouge, LA

Diabetes represents a significant global health burden, with its prevalence continuously rising and causing extensive impacts on individuals, healthcare systems, and society. The International Diabetes Federation (IDF) Diabetes Atlas 2021 reported a global prevalence of 10.5%, with type 2 diabetes (T2D) comprising approximately 90% of cases. In the US, diabetes prevalence stands at 11.6%, affecting roughly 38.4 million adults, with approximately 1.2 million new diagnoses each year. Obesity, affecting over 42% of US adults-including 9.4% with severe obesity-is recognized as the primary risk factor for diabetes. Severe obesity, present in around 30% of T2D patients, markedly elevates the risk for cardiovascular disease, non-alcoholic fatty liver disease, and other comorbidities, resulting in increased mortality rates. Addressing this burden requires coordinated strategies targeting prevention, early diagnosis, effective treatment, and patient education. However, conventional management methods, such as lifestyle modifications and pharmacotherapy, often result in transient weight loss and temporary diabetes remission, with frequent relapses. In contrast, metabolic surgery, notably Roux-en-Y gastric bypass (RYGB) and vertical sleeve gastrectomy (VSG), has emerged as a highly effective intervention for significant weight loss and durable diabetes remission, particularly among patients with severe obesity and T2D. These procedures improve metabolic outcomes beyond weight reduction, enhancing insulin sensitivity and glycemic control. Consequently, integrating metabolic surgery into standard diabetes care guidelines and expanding patient access is crucial. Although metabolic surgery outperforms intensive medical therapy, traditional assessment methods, such as HbA1c, have notable limitations. HbA1c measures average glucose levels without capturing short-term fluctuations, glucose variability, or hypoglycemia, limiting its utility post-surgery. Continuous glucose monitoring (CGM) offers real-time, detailed insights into glucose patterns, variability, postprandial excursions, and hypoglycemia, making it highly suitable for postoperative monitoring. CGM provides a clearer picture of immediate and long-term metabolic changes following surgery, allowing early identification of abnormal glycemic patterns influenced by surgical alterations in gastrointestinal anatomy and diet. It enables the detection of post-bariatric hypoglycemia (PBH), a recognized complication following metabolic surgery, and improves understanding of hypoglycemia unawareness-critical for enhancing patient safety and clinical outcomes. However, current research on CGM in metabolic surgery remains limited, primarily consisting of cross-sectional or retrospective studies with small sample sizes, lacking preoperative data, and employing short monitoring periods. Therefore, robust studies such as randomized controlled trials (RCTs) are essential to validate CGM's efficacy and inform its broader adoption in clinical practice.

Waitlist Available
Has No Placebo

Pennington Biomedical Research Center

Image of UNC Lineberger Comprehensive Cancer Center in Chapel Hill, United States.

Support Program for Caregivers of Patients with Cancer and Diabetes

18 - 99
All Sexes
Chapel Hill, NC

This study investigates the feasibility, acceptability, and preliminary efficacy of enCompass Humana, a social support intervention for caregivers of patients with cancer and diabetes. The enCompass program aims to improve support for these caregivers through a randomized feasibility study of a pilot-tested coaching and navigation program. Caregiver services and system-level support are essential, but successful interventions for cancer caregivers are rarely standardized or systematically disseminated. Consequently, many programs do not reach the most underserved caregivers. Challenges to implementation include substantial clinical staff involvement, lack of dissemination and implementation information, and failure to tailor interventions to rural contexts. Despite the lack of standardized supportive interventions, national reports and legislative efforts increasingly recognize the need to support caregivers. Caregivers reported unmet needs in all domains of social support, including instrumental help (e.g., in-home help, housekeeping), logistical and coordination support (e.g., food delivery, accompanying patients to appointments), information about illness and progression, emotional support, self-care guidance, and financial assistance (e.g., parking costs, lost wages). Caregivers show high interest in services but cited uncertainty and lack of strategies for accessing resources. Many are unaware of existing services. Interviews with oncology clinicians and healthcare administrators revealed similar findings: resources exist, but there is no system to match them with caregivers' needs. Preliminary data suggest the intervention improves caregiver coping self-efficacy and reduces anxiety and depression in patients. With input from stakeholders, including caregivers, patients, family caregiving experts, and clinical care experts, the study team adapted the CARING application into enCompass to mitigate structural barriers and normalize support-seeking. The long-term goal is to adapt this psychosocial support program to increase self-efficacy, support-seeking, and reduce loneliness among caregivers. It is hypothesized that enCompass will build self-efficacy and coping skills, serving caregivers throughout the patient's illness and complications.

Recruiting
Has No Placebo

UNC Lineberger Comprehensive Cancer Center (+2 Sites)

Erin E Kent, PhD

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We made a collection of clinical trials featuring Fastin, we think they might fit your search criteria.
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