Looking at the topic (Phentermine Vs Vyvanse), we can think why compare these two drugs, because theirs different medications. One is anorectic, while the other is a CNS stimulant used to treat attention deficit hyperactivity syndrome. But, this comparison is helpful for those people who are under treatment for ADHD, as well as think to manage an overweight problem. Simultaneously, that is also helpful for overweight people. So let’s compare Phetermine and Vyvanse based on their use, mechanism, side effects, and precautions. Also, explore some query questions like Can you take Phentermine and vyvanse at the same time? And is it safe to take phentermine and vyvanse together?
Phentermine Vs Vyvanse: Difference & Similarities
What Is Phentermine & Vyvanse?
Phentermine is a prescription drug that helps with weight loss for people who are overweight and have other health conditions (high blood pressure, diabetes, or high cholesterol). It is available under various brand names, such as Adipex-P, Lomaira, Ionamin, and Suprenza, and comes in different forms, such as tablets and capsules. But only use the drug under medical supervision and follow the healthcare provider.
Vyvanse is the brand name of Lisdexamfetamine, that used for attention deficit hyperactivity disorder (ADHD) in children and adults and binge eating disorders in adults (BED). Also, the drug improves focus and attention, as well as hyperactivity and impulsiveness, and reduces appetite as a secondary effect. It comes from different formulations, including Capsule, Tablet, and Chewable, and its dosage depends on patients’ age, weight, and response to the treatment.
Key Difference Between Phentermine And Vyvanse
Understanding the difference between Phentermine and Vyvanse helps you make informed decisions about treatment options, whether you’re looking to manage weight or improve focus and behavior. Their comparison based on various factors includes their purposes, effectiveness, safety profiles, and potential side effects.
Effectiveness for Weight Loss/ADHD:
- Phentermine: It is more effective for weight loss because it is designed to suppress appetite, and it’s effective for short-term weight loss when combined with diet and exercise.
- Vyvanse: Weight loss is a secondary effect due to reduced appetite. It’s mainly designed for people with ADHD or binge eating disorder who happen to lose weight.
Mechanism of Action
- Phentermine: Phentermine works on the sympathetic nervous system and increases the release of certain neurotransmitters (Norepinephrine) in the brain. Norepinephrine acts like a fight-or-flight response and controls appetite (hypothalamus), creating a feeling of satiety or reduced hunger.
- Vyvanse: Vyvanse is a form of dextroamphetamine. It affects the brain by altering the neurotransmitter activity and increasing dopamine and norepinephrine. Dopamine helps to improve attention, focus, impulse control, and working memory. Norepinephrine helps to increase alertness, energy, mood regulation, and stress response.
Duration of Use
- Phentermine: Most healthcare providers recommend Phentermine for short-term use up to 12 weeks, and sometimes that prescribed for longer use in off-label uses.
- Vyvanse: It is a long-acting stimulant and is also used for long-term treatment for both ADHD and BED. But its duration depends on dosage, metabolism, age, and tolerance.
Duration Of Effect
- Phentermine: its half-life is 20 hours and is completely cleared from the body about 4-6 days. But its duration of effect is based on dosage, individual metabolism, age, and tolerance.
- Vyvanse: It stays in the system about 10 to 14 hours, but its duration of effect is based on dosage, individual metabolism, age, and tolerance.
Side Effects
- Phentermine: Common side effects include dry mouth, trouble sleeping, headache, tremor, dizziness, restlessness, constipation, diarrhea, increased heart rate, or blood pressure. But serious side effects are pulmonary hypertension, damage to the heart valves, misuse and dependence, and impaired functioning
- Vyvanse: common side effects include loss of appetite, weight loss, anxiety, diarrhea, constipation, dizziness, dry Mouth, irritability, insomnia, nausea, vomiting, and stomach pain. Serious side effects, such as serotonin syndrome, heart problems, decreased growth in children, mood changes, hallucinations, and allergic reactions
Potential for Abuse
- Phentermine: It is a highly abused drug, especially for its active ingredient, amphetamines. It is classified as a Schedule IV controlled substance. Thus, it can only be bought with a valid prescription in most countries.
- Vyvanse: it lowers abuse potential because it prodrug. It is classified as a Schedule II controlled substance. It has more effects than immediate-release stimulants.
Similarities Of Phentermine And Vyvanse
Both drug belongs to stimulant medications and affect the central nervous system, increasing alertness, focus, and energy. These drugs are used for different conditions, but they affect appetite, such as weight loss is a side effect of Vyvanse. They contain a risk of abuse and dependence and have some side effects that overlap, such as increased heart rate, elevated blood pressure, insomnia, dry mouth, and anxiety. Due to the risk of abuse, dependence, and side effects, both medications should be used only under a doctor’s supervision.
Which is better, Phentermine or Vyvanse?
For Weight Loss, Phentermine is a better choice because its primary purpose is appetite suppression and weight loss. But, it is not recommended for longer-term use. If you are using it along with a healthy diet and exercise, it provides better results. For ADHD, Vyvanse is a better choice for long-term treatment of ADHD, as it is designed to manage ADHD symptoms, improve focus, and reduce appetite as a side effect.
Frequently Asked Questions
Can you take Phentermine and vyvanse at the same time?
It is not recommended to take Phentermine and vyvanse together. Because both are stimulant medications, if you are taking them together, it leads risk of overdose, abuse, dependency, or tolerance, such as high blood pressure, rapid heart rate, anxiety, insomnia, and risk of serotonin syndrome.
Why would a doctor prescribe Vyvanse over Phentermine?
A doctor might prescribe Vyvanse over Phentermine for several reasons, depending on diagnosis, treatment goals, and health history. Some people with ADHD need to lose weight; in this case, the doctor can prescribe Vyvanse to treat ADHD and indirectly help with weight loss.
Can I switch from Phentermine to Vyvanse?
Yes, you can switch from Phentermine to Vyvanse only under your doctor’s supervision. Don’t switch medications on your own, because both are stimulants and carry various risks. This switch is beneficial when you need a longer-term treatment plan, treating ADHD or binge eating, and not tolerating Phentermine well.
Conclusion
Always choose between Phentermine and Vyvanse, should discuss with your doctor for your weight loss, mental health, or long-term management. Your healthcare provider helps to choose the right options, balancing benefits with potential risks. It’s important to maintain a healthy diet, exercise, and lifestyle changes while taking them.