If you’re finding it difficult to lose weight on your own with diet and exercise, then the two widely used medicines are Contrave and Fentermina (well-known as Phentermine). It is used to suppress appetite in the body. Both are prescription medicines approved by the FDA for weight loss, but they function differently and have distinct advantages. Fentermina is a short-term medication that has a quick action to decrease weight. Whereas Contrave has been utilized as a long-term behavioral control. Understanding the difference between Contrave vs Fentermina is essential for your weight loss journey.
In this article, we will discuss the mechanisms of action for both Contrave and Fentermina. So that you can better understand how they affect your body, appetite, and metabolism. And also, we compare its ingredients, effectiveness, side effects, safety precautions, and which medication is best suited for you, so you can make significant decisions with your healthcare provider.
Difference Between Contrave and Fentermina
Understanding Contrave and Fentermina
Both Contrave and Fentermina work differently to reduce weight. It is due to its mechanism of action, onset of action, addiction, and dependence. Contrave has dual action and helps to control both hunger and food addiction. Fentermina activates the brain to suppress appetite and boost energy.
What is Contrave?
The Contrave pill is designed for weight loss to help adults with obesity or those who are overweight with weight-related medical issues. It comes with the combination of two medications: naltrexone and bupropion to reduce appetite and control cravings. It is not a controlled substance, but it works by targeting the brain involved in hunger and reward, making it easier for food intake, emotional resistance, or compulsive eating. Contrave is not habit-forming; you can use it for long periods as part of a comprehensive weight loss plan that comprises a healthy diet, exercise, and behavioral changes.
What is Fentermina?
Fentermina is a Schedule IV controlled substance and is used to help manage weight loss. It is classified as a sympathomimetic amine (similar to amphetamines), which stimulates the central nervous system resting on suppressing appetite, allowing individuals to decrease the number of calories consumed to promote weight loss. It is indicated for short-term use (up to 12 weeks) in conjunction with diet and exercise, and is recommended for most patients at a health risk related to weight.
Due to its stimulant properties, it can cause serious side effects such as increased heart rate, dry mouth, daytime sleepiness ( insomnia), restlessness, and it is NOT a substance to be used by individuals with certain heart issues or anxiety.
Major Differences
Contrave and Fentermina are two effective medications used to promote weight loss in adult patients with obesity, but the two differ in formulation, mechanism of action, adverse events, and route of administration. Understanding these differences can help you and your doctors make the best choice for your weight management therapy.
Active ingredients and Drug class
Contrave is the combination of bupropion (an antidepressant) and naltrexone (for treating addiction) to act in synergy to influence the brain hunger and reward center to lower cravings and emotional eating. Whereas Fentermina is a stimulant drug acts by the suppression of appetite by simulation of the CNS.
Mechanism of Action
Contrave primarily acts on both hypothalamus (suppresses hunger) and reward system, whereas Fentermina stimulates the release of norepinephrine to lower appetite.
Effectiveness
Contrave assists patients in losing 5-10 % of body weight within 12 months when used with exercise and diet. Though Fentermina results in quicker weight loss within 3 months, it is prescribed as a short-term treatment for up to 12 weeks.
Which is better: Contrave or Fentermina?
There is no research about comparing which medication is best, but drug selection is an important thing that contains a variety of factors such as your medical conditions, how your body responds to medication, drug interactions, and insurance coverage.
Contrave is a non-stimulant medication better options for long-term weight management due to the combination of bupropion and naltrexone, they reduce both appetite and food craving, while Fentermina is advised for short-term weight loss , producing faster result by caring a risk of different side effects.
Drug Interactions
Contrave and Fentermina both have drug interaction risk profiles that should be used carefully under the supervision of a licensed healthcare provider before starting treatment.
Contrave Interaction
- If Contrave interacts with other medications, it can increase the risk of seizures, and it should not be used with monoamine oxidase inhibitors (MAOIs) due to the risk of high blood pressure.
- While using any opioid pain medications (Oxycodone or Hydrocodone) it causes sudden withdrawal or reduced pain control.
- When Contrave interacts with SSRIs, SNRIs, and other antidepressants, it increases the risk of serotonin syndrome.
Fentermina Interaction
- Fentermina has significant drug interaction risks, It shouldn’t be used with MAOIs that cause a life-threatening hypertensive crisis.
- Combining with any ADHD medications can increase the risks of heart failure, anxiety, or insomnia.
Side Effects of Contrave vs Fentermina
When discussing the two weight loss medications like Contrave and Fentermina, it’s essential to understand the potential side effects. Both drugs can support weight loss control, but each has its own risk profile.
Common Side Effects of Contrave
Contrave combines bupropion and naltrexone to target the nervous system and digestive tract and produce some common side effects; these are
- Increased sweating
- Insomnia
- Dry mouth
- Dizziness
- Headache
Severe Side Effects of Contrave
Contrave also produces some serious side effects that are listed below.
- Allergic reactions
- Increased blood pressure
- Liver damage
- Suicidal thoughts
- Seizures
Common Side Effects of Fentermina
Fentermina is a stimulant medication and it is used for short-term weight loss purposes, due to this, it produces common side effects that are listed below.
- Sleep problems
- Constipation
- Increased heart rate
- Nervousness or anxiety
- Restlessness
Severe Side Effects of Fentermina
Fentermina also produces some severe side effects due to potential risk of abuse, addiction and dependence.
- Chest pain or shortness of breath
- High blood pressure
- Withdrawal symptoms
- Heart palpitations
- Tremors or restlessness
Frequently Asked Questions (FAQs)
Can I take Contrave and Fentermina together?
Both medications are very effective for reducing weight loss. Taking together is generally not recommended by any healthcare provider. Because it contains potential side effects such as high blood pressure, anxiety, heart problem, and insomnia. So before you take any weight loss medications, first consult your healthcare provider for appropriate medications.
Which works faster for weight loss: Contrave or Fentermina?
Fentermina works faster for weight loss than Contrave, especially in the short-term. Many users reported that it starts their work in the first week of taking and produces quicker results.As it has the potential for side effects due to being fast-acting, these are Nervousness or anxiety, withdrawal symptoms and High blood pressure.
What should I do if I miss a dose of Contrave or Fentermina?
If you forget to take a dose of Contrave or Fentermina, you should consult and adhere to the particular rules that are delivered by your physician. If you miss a dose simply skip it and take your next dose at the regular time and don’t take an extra dose can increase risk of having different side effects.
Final Word
Both Contrave and Fentermina are very useful prescription weight-loss aids—but they are different in their mechanism and indication in patients. Contrave has a more complicated drug interaction profile with its multiple ingredients, particularly for opioid or antidepressant users. On the other hand, Fentermina has to be used with caution to stimulant and cardiovascular medications. Understanding how both medications work, their advantages, their drawbacks, may help you to work with your doctor to come up with a strategy that affords you a higher chance at achieving lasting results.