
Diet pills, also known as weight-loss medication or appetite suppressants, are designed to affect how the body and brain experience appetite and hunger. They are typically prescribed to individuals with obesity, aiming to reduce their appetite or make them feel full faster after consuming smaller portions of food. While prescription diet pills can aid in weight loss, they are not a standalone solution and should be combined with a reduced-calorie diet and regular physical activity for optimal results. This paragraph introduces the topic of diet pills, explaining their purpose, intended use, and potential effectiveness when coupled with complementary lifestyle changes.
What do diet pills contain?
| Characteristics | Values |
|---|---|
| Type | Appetite Suppressants |
| How they work | Reduce hunger, increase feelings of fullness |
| Prescription | Phentermine-topiramate (Qsymia), Benzphetamine (Didrex, Regimex), Diethylpropion (Tenuate, Tenuate Dospan), Phendimetrazine (Prelu-2), Phentermine (Dipex-P, Atti-Plex P, Pro-Fast) |
| Non-Prescription | Orlistat (Xenical, Alli) |
| Side Effects | Mild and temporary, but may worsen with high-fat food intake. Rare cases of severe liver injury reported. |
| Precautions | Not suitable for those with substance use disorder (SUD) or a family history of SUD. Not recommended during pregnancy or for those with glaucoma, hyperthyroidism, heart disease, or a history of stroke. |
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What You'll Learn

Appetite suppressants
Prescription appetite suppressants are typically recommended for people with obesity (a body mass index, or BMI, over 30) and can be for long-term or short-term use. It is important to consult with a healthcare provider before taking any over-the-counter (OTC) diet pills, as they may interact with medications or cause health problems.
The Food and Drug Administration (FDA) has approved several prescription appetite suppressants for long-term use, including Liraglutide (Saxenda®), Semaglutide (Wegovy®), Naltrexone-bupropion (Contrave®), and Phentermine-topiramate (Qsymia®). These are typically administered as injections or pills.
Other FDA-approved prescription appetite suppressants are intended for short-term use, usually up to 12 weeks (three months). These include Benzphetamine (Didrex®, Regimex®), Diethylpropion (Tenuate®, Tenuate Dospan®), Phendimetrazine (Prelu-2®), and Phentermine (Dipex-P®, Atti-Plex P®, Pro-Fast®), among others. It is important to note that these short-term appetite suppressants are controlled substances with addiction potential and should be used with caution.
Additionally, there are various natural appetite suppressants and weight loss supplements available over the counter and online, often in the form of pills, powders, or drinks. These products may contain ingredients such as green tea extract, vitamins, apple cider vinegar, or natural compounds like berberine and actiponin gynostemma. While these supplements offer an alternative to prescription medications, it is always advisable to consult with a healthcare professional before starting any new supplement or weight loss regimen.
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Prescription vs. non-prescription
Prescription diet pills are medications that are designed to help with weight loss and are available only via a doctor's prescription. They are typically recommended for people who are obese or have a Body Mass Index (BMI) of 30 or greater. Prescription diet pills can also be recommended for people with a BMI between 25 and 30, who are considered overweight. These pills work by suppressing appetite, making an individual feel full faster, or reducing the absorption of nutrients from food. Examples of prescription diet pills include orlistat (Xenical), phentermine-topiramate (Qsymia), naltrexone-bupropion (Contrave), liraglutide (Saxenda), and semaglutide (Wegovy). It is important to note that prescription diet pills are meant to be used in conjunction with a healthy eating plan and regular physical activity for effective and sustained weight loss.
On the other hand, non-prescription diet pills, also known as over-the-counter (OTC) appetite suppressants or weight-loss supplements, can be purchased without a prescription. These pills often contain stimulants such as ephedra, ephedrine, or caffeine. While they may provide a short-term boost in energy and metabolism, they also come with a range of side effects. Some people have reported heart attacks, seizures, strokes, and even death after taking non-prescription diet pills. It is crucial to consult a healthcare provider before taking any non-prescription weight-loss supplements to ensure safety and effectiveness.
Prescription diet pills are regulated by the U.S. Food and Drug Administration (FDA) and are generally considered safer when used as directed by a healthcare professional. They are often recommended for short-term use, typically up to 12 weeks, due to their potential for addiction and side effects. Before prescribing these medications, doctors will consider an individual's medical history, current health status, and risk factors to determine the most appropriate treatment option.
Non-prescription diet pills, on the other hand, are not subject to the same level of regulatory scrutiny and may not have sufficient scientific evidence to support their effectiveness. The long-term effects of these pills may be unknown, and their manufacturing processes may not adhere to strict standards. As a result, the safety profile of non-prescription diet pills may be less established compared to their prescription counterparts.
While prescription diet pills have been clinically tested and approved for use under medical supervision, non-prescription diet pills may not undergo the same rigorous evaluation. This means that the ingredients, dosage, and potential interactions of non-prescription pills may not be well understood. Self-medicating with non-prescription diet pills without medical advice can be risky, especially for individuals with certain medical conditions or those taking other medications.
In summary, prescription diet pills are regulated medications that require a doctor's prescription and are generally considered safer when used appropriately under medical supervision. Non-prescription diet pills, while easily accessible, may come with unknown risks and side effects. It is always advisable to consult a healthcare professional before taking any weight-loss supplements to ensure they are safe and suitable for your individual needs.
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Side effects
Diet pills, also known as appetite suppressants, are a type of weight-loss medication for people with obesity (a body mass index, or BMI, over 30). They work by affecting how your body and brain experience appetite and hunger, making you feel less hungry or full faster after eating less food. While they can be effective for weight loss, it's important to be aware of potential side effects.
One commonly prescribed diet pill is Orlistat, which works by blocking the enzyme that breaks down fats in food, thereby inhibiting the absorption of dietary fats. Common side effects of Orlistat include an oily discharge from the rectum, flatus with discharge, increased defecation, and fecal incontinence.
Another class of drugs used for weight loss is GLP-1 receptor agonists, such as semaglutide and liraglutide. These medications can cause gastrointestinal (GI) side effects such as nausea, vomiting, acid reflux, bloating, stomach cramps, diarrhea, and constipation. While these symptoms are generally mild and temporary, they can impact a patient's comfort and adherence to the medication.
Other potential side effects of diet pills include upset stomach, bloating, and kidney problems or failure. In rare cases, medications like tirzepatide have been associated with thyroid tumors or thyroid cancer. It's important for patients to be monitored for any potential side effects and to report them to their healthcare provider.
Additionally, it's worth noting that prescription appetite suppressants can have addiction potential and can be dangerous if not used as intended or prescribed. It's always important to consult with a healthcare professional before starting any weight-loss medication to ensure a safe and effective treatment plan.
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Addiction potential
Diet pills can be highly addictive, and their abuse can lead to severe and lasting effects on the body. Diet pills are often misused by people seeking stimulant effects or those with disordered eating patterns. Stimulants, which are commonly found in diet pills, can increase energy and provide a sense of euphoria, making them highly addictive. Additionally, appetite suppressants can also be addictive as they target neurotransmitters in the brain that affect mood and appetite.
The risk of addiction is influenced by various factors, including biological and environmental factors, home and family life, peers, age of first use, and how the drug is taken. People may become tolerant of the energy boost provided by diet pills and start increasing their dosage, a common characteristic of addiction. The pressure to conform to societal beauty standards and emotional distress related to obesity can also drive individuals to misuse stimulants as a means of coping or gaining control.
Diet pill addiction is often linked to underlying mental health issues, such as eating disorders, anxiety, depression, or borderline personality disorder. Individuals with eating disorders may exhibit purging behaviours, such as vomiting, laxative use, diuretic use, and emetic use, alongside diet pill use. The presence of these co-occurring disorders can create a cycle of addiction and withdrawal, further complicating the recovery process.
Some diet pills have been banned by the FDA due to their addictive properties and severe health consequences, including overdose deaths. It is crucial to consult a healthcare professional before using any weight-loss medication, as many diet pills lack scientific evidence and may lead to health complications or dependency.
While diet pills may provide short-term weight loss, their long-term effectiveness is questionable, and their potential for addiction and abuse should not be overlooked.
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Cost
The cost of diet pills varies depending on the specific medication and how you access it. Weight loss medications, including pills and injections, can range in price from $69 to $2,000 per month. Weight loss injections without insurance typically cost around $1,000 to $2,000 per month when purchased from a typical pharmacy. However, the price may be lower if you have a health savings account (HSA) or flexible spending account (FSA). People save around 30% on average when using these accounts to pay for weight loss medications.
Some medications, such as Byetta, can cost around $900 for a one-month supply, while others, like Bydureon BCise, range from $800 to $900. The cost of weight loss treatments can be reduced by using pharmacy coupons or taking advantage of savings programs offered by pharmaceutical companies. For example, AstraZeneca, the company that manufactures Byetta and Bydureon BCise, offers a program to assist with out-of-pocket expenses.
Additionally, insurance coverage can significantly impact the cost of diet pills. While some medications may not be covered by insurance, others, such as Qsymia, are covered by select Medicare and insurance plans. It is always worth checking with your insurance provider to understand what coverage may be available to you. Certain healthcare plans may offer support if you meet specific criteria.
The popularity of a medication can also affect its cost. For instance, phentermine (Adipex-P) is a more popular and inexpensive option for weight loss. In contrast, Evekeo, a drug used to treat attention-deficit hyperactivity disorder and narcolepsy, is less popular and more expensive when used for short-term weight loss.
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Frequently asked questions
Diet pills, or appetite suppressants, can contain a variety of substances, including phentermine-topiramate (Qsymia), benzphetamine (Didrex, Regimex), diethylpropion (Tenuate, Tenuate Dospan), phendimetrazine (Prelu-2), and phentermine (Dipex-P, Atti-Plex P, Pro-Fast). These drugs work by reducing your appetite or making you feel full faster, leading to reduced calorie intake and weight loss.
Yes, there are two main types of diet pills: prescription diet pills and over-the-counter diet pills. Prescription diet pills are typically recommended for individuals with obesity (BMI over 30) and are meant for short-term use under medical supervision. Over-the-counter diet pills, such as Alli, are available without a prescription but may have lower doses or different formulations.
The side effects of diet pills can vary depending on the specific medication. Generally, they are considered mild and temporary, but rare cases of severe reactions have been reported. Side effects may include allergic reactions, seizures, liver damage, increased blood pressure or heart rate, and vision problems. It is important to discuss potential risks and benefits with a healthcare provider before taking any diet pill.











































