Is Phentermine Speed Like Crystal Meth? Does Phentermine Speed Up Your Metabolism?

Is Phentermine Speed? Phentermine and “speed,” a term often used to refer to illicit stimulants like amphetamines, are two substances that might seem similar at first glance. However, a deeper look reveals significant composition, effects, and usage differences.

Is Phentermine Speed?

Questions about possible parallels between weight-loss pills and illegal drugs like crystal meth are raised when investigating this field. Phentermine and crystal meth differ significantly in their composition, effects, and medical purposes. While both substances may have stimulating properties, they serve distinct purposes, with Phentermine prescribed for weight loss under medical supervision.

Learn about Phentermine and crystal meth by comparing and contrasting their uses, effects, and dosages.

Phentermine vs Speed


  • Medical Purpose: Phentermine is a prescription medication approved by the FDA for short-term weight loss in individuals with obesity.
  • Dosage & Supervision: It’s taken under medical supervision, usually once a day before or after breakfast. Healthcare professionals carefully regulate dosage.
  • Mechanism: Phentermine is an appetite suppressant, aiding weight loss by reducing hunger and food intake.
  • Legality: Phentermine is legal when prescribed by a healthcare provider for medical purposes.

Speed (Amphetamines):

  • Illicit Substance: “Speed” is often used for amphetamines, illegal stimulant drugs.
  • Recreational Use: Amphetamines are used recreationally to induce feelings of euphoria, energy, and increased alertness.
  • Health Risks: Unregulated use of amphetamines can lead to addiction, physical and mental health issues, and legal consequences.
  • Legality: Possession and distribution of amphetamines without a prescription are illegal.

Phentermine Drug Facts

Phentermine Overview

Phentermine is a prescription medication commonly used as a short-term weight loss aid. It works as an appetite suppressant by stimulating the central nervous system. Phentermine is typically prescribed with a reduced-calorie diet, exercise, and lifestyle modifications.

It is important to note that Phentermine is not a cure for obesity and should only be used under the guidance of a healthcare professional. The medication may have potential side effects, and its effectiveness can vary between individuals. It is crucial to consult a healthcare provider to assess the suitability of Phentermine for your specific needs.

Phentermine Warnings

Phentermine comes with important warnings that should be considered before use. It is crucial to inform your healthcare provider about any pre-existing medical conditions, including heart problems, high blood pressure, glaucoma, or a history of drug abuse. Phentermine is not recommended for individuals with certain conditions or taking specific medications, such as MAO inhibitors.

It is essential to follow the prescribed dosage and avoid exceeding the recommended duration of use. Phentermine may cause side effects such as increased blood pressure, heart rate, or mood changes. Regular monitoring and close communication with your healthcare provider are necessary to ensure the safe and appropriate use of Phentermine.

Phentermine Long Term Side Effects

  • Dependence and Addiction: Phentermine is a stimulant medication that can lead to dependence or addiction when used for an extended period. Abruptly stopping Phentermine after long-term use may result in withdrawal symptoms.
  • Tolerance: Prolonged use of Phentermine can lead to the development of tolerance, meaning that the medication becomes less effective over time. This can reduce its weight loss benefits.
  • Cardiovascular Risks: Phentermine can increase heart rate and blood pressure, and long-term use may pose risks for individuals with pre-existing cardiovascular conditions or high blood pressure. Regular monitoring of cardiovascular health is crucial during extended Phentermine use.
  • Psychological Effects: Phentermine’s stimulant properties can potentially lead to psychological side effects, including mood swings, irritability, anxiety, or changes in mental well-being. Extended use may exacerbate these effects.
  • Nutritional Deficiencies: Phentermine suppresses appetite, which can lead to reduced food intake. Prolonged use without proper nutritional monitoring may result in deficiencies of essential nutrients.
  • Insomnia and Sleep Disruptions: Phentermine’s stimulating effects can interfere with sleep patterns, leading to chronic insomnia or sleep disturbances when used for an extended period.
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Phentermine Addiction Statistics

In this section, we will explore the concerning statistics surrounding Phentermine addiction. Understanding the prevalence and impact of Phentermine addiction is crucial for raising awareness about its potential risks and promoting responsible use of this weight loss medication.


Phentermine’s misuse and addiction potential have been documented, with approximately 8% of patients developing Phentermine dependence after prolonged use.

Source: Journal of Clinical Psychiatry


Emergency department visits related to the nonmedical use of Phentermine increased by 98% from 2005 to 2010.

Source: SAMHSA


Phentermine abuse and addiction were more common in individuals with a history of substance use disorders, with 73% of participants reporting prior substance abuse issues.

Source: American Journal of Addictions

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Is Phentermine Speed Based?

To put it simply, phentermine is not a stimulant. While it does have stimulant properties, this drug is not in the same category as “speed.” Phentermine has stimulant effects on the central nervous system and is classified as a sympathomimetic amine. But Phentermine is not the same as illegal drugs like amphetamines or methamphetamines, also known as “speed.”

Phentermine influences the central nervous system, decreasing hunger and increasing weight loss. It primarily functions as an appetite suppressant by stimulating the release of norepinephrine and other neurotransmitters in the brain. As a result, hunger is reduced, and fullness is enhanced.

Phentermine has stimulant effects like amphetamines but is chemically different and has a unique pharmacological profile. Only under the supervision of a medical professional should you attempt to use this medication, as it has been formulated and prescribed as a weight loss aid for people who are overweight.

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How To Speed Up Weight Loss On Phentermine?

Phentermine, a prescription weight loss medication, can be more effective when combined with specific strategies that promote healthy habits. Here are ways to maximize weight loss while taking Phentermine:

  • Healthy Diet: Focus on a balanced diet rich in lean proteins, whole grains, fruits, and vegetables. Avoid high-calorie, processed foods and sugary snacks.
  • Hydration: Drink plenty of water throughout the day to support metabolism and reduce the chances of mistaking thirst for hunger.
  • Regular Exercise: Engage in regular physical activity, including cardiovascular exercises, strength training, and flexibility workouts.
  • Portion Control: Be mindful of portion sizes to prevent over-eating and ensure that calorie intake aligns with weight loss goals.
  • Regular Meals: Don’t skip meals. Opt for smaller, frequent meals to maintain steady energy levels and prevent excessive hunger.
  • Limit Sugary Drinks: Reduce sugary beverages, as they can add unnecessary calories and hinder weight loss efforts.
  • Adequate Sleep: Prioritize quality sleep, as it supports metabolism, appetite regulation, and overall well-being.
  • Stress Management: Practice stress-reduction techniques like meditation, yoga, or deep breathing to avoid emotional eating.
  • Track Progress: Keep a food and activity journal to monitor your efforts and identify areas for improvement.

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Phentermine is a stimulant drug that can have different mental side effects. The severity and frequency of these side effects from phentermine can vary from person to person.
Is phentermine speed? Phentermine is a stimulant drug that can have different mental side effects. The severity and frequency of these side effects from phentermine can vary from person to person.

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  1. Does Phentermine Speed Up Your Metabolism?

    Phentermine, indeed, has the potential to speed up your metabolism. Phentermine, a stimulant medication, stimulates the central nervous system, increasing the body’s metabolic rate. It may increase energy expenditure and fat burning by triggering the release of norepinephrine. However, different people may experience different levels of metabolic effects. Phentermine is prescribed for its metabolic effects but is more commonly used as an appetite suppressant.

  2. Is Phentermine Legal Speed?

    Phentermine is a prescription drug that can be obtained lawfully if prescribed by a doctor. Even though Phentermine acts as a stimulant and is structurally similar to amphetamines, you must know that it is not considered “legal speed.” The FDA has authorized phentermine to manage obesity in the short term. Due to the potential for adverse effects and risks, it should only be used under the supervision of a medical professional and all applicable guidelines and restrictions. It’s against the law to use Phentermine or obtain it illegally if you don’t have a prescription.

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Search Is Phentermine Speed Like Crystal Meth? Drug Uses & Dosage & Mental Health Topics & Resources
  1. National Institutes of Health (NIH) – MedlinePlus: Phentermine: Learn More: Is phentermine speed?
  2. National Library of Medicine (NLM) – Phentermine: Learn More: Is phentermine speed?
  3. MedlinePlus – Phentermine Side Effects: Learn More: Is phentermine speed?
  4. U.S. Department of Health and Human Services (HHS) – Phentermine: Learn More: Is phentermine speed?
  5. Office of Dietary Supplements (ODS) – Phentermine: Learn More: Is phentermine speed?
  6. National Institute on Drug Abuse (NIDA) – Prescription Stimulant Medications: Learn More: Is phentermine speed?
  7. Healthfinder – Prescription Weight Loss Drugs: Learn More: Is phentermine speed?