Phentermine vs Adderall | Effectiveness

Learn From Doctor Team
Learn From Doctor Team is made up of well-qualified doctors of different fields with brilliant academic results and professional careers. The article is written and reviewed by doctors of this specialty.

Phentermine vs Adderall

Phentermine vs Adderall are prescribed for treating different conditions. However, they both are stimulant drugs. 

Phentermine is available as Adipex-P, Lomaira, Suprenza. FDA approves it as a weight loss medication. 

Adderall contains amphetamine and dextroamphetamine. It is used to treat attention deficit hyperactivity disorder (ADHD) and narcolepsy. 

The common side effect of Adderall is weight loss. So that’s why sometimes doctors prescribe this medication for weight loss. 

Though these two medications are different in nature, still using for a single purpose weight loss. 

Our article is focused on differentiating these two drugs, their function, side effects, and effectiveness. 

Let’s dive deep into Phentermine vs Adderall.

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Phentermine

Phentermine stimulates the CNS (central nervous system) and that causes;

  • Increase heart rate
  • Increase blood pressure
  • Decrease appetite

Phentermine is mainly used to treat high-risk obese patients suffering from high cholesterol, high blood pressure, diabetes, etc. 

Phentermine tablet
Phentermine tablet

Uses

Phentermine is a prescription drug. 

Take this medication by mouth 1 hour before the meal or 1 to 2 hours after breakfast.  

Your doctor may recommend you take this medication 1 to 3 times (usually once) a day. 

Do not miss the medication. Taking late may cause difficulty in sleeping. 

This medication is recommended to take 10 to 14 hours before bedtime. Your doctor may make some small dosages and recommend you to take small doses multiple times a day. 

Take the tablet or capsule as the doctor recommended. 

Side Effects

There are some side effects of Phentermine. The common side effects of Phentermine may include;

  • Dizziness
  • Dry mouth
  • Difficulty sleeping
  • Nausea
  • Vomiting
  • Diarrhea 
  • Irritability
  • Constipation

A drug is prescribed when the doctor thinks the benefits are greater than the side effects. 

This medication may increase your blood pressure progressively. So, check your blood pressure regularly, and if you notice anything unusual, then talk to your doctor. 

If you face any serious side effects such as hallucination, serious irritability, headache, then stop the medication and talk to your doctor immediately. 

This drug very rarely can cause serious conditions such as heart problems, breathing difficulty, etc. However, if you experience any of this, talk to your doctor. 

Warnings

Make sure before taking this medication, you have consulted with your doctor about every medical history of yours. 

Talk to your doctor if you are allergic to any medication. For example, Phentermine may cause an allergic reaction to some users. 

Make sure your doctor knows your’s

  • Drug history
  • Family history of disease and conditions
  • High blood pressure
  • Diabetes
  • Glaucoma
  • Addiction to drug or alcohol
  • Smoking history
  • Lung conditions
  • Stoke or any hemorrhage history
  • Kidney disease
  • Seizures

This medication may cause vision disturbance and dizziness. Do not work in danger while you are experiencing these side effects. 

Talk to your doctor frankly if you are a drug addict. 

Drug Interactions

Phentermine does not interact with other drugs. 

phentermine molecular model
phentermine molecular model

If you are taking other drugs with Phentermine, make sure your doctor knows it. 

Don’t forget to mention any herbal products if you are using any. 

Overdose And Missed Dose

Overdose

Overdose of Phentermine may cause difficulty breathing, unconsciousness, and other conditions. If you have overdosed, call the emergency health service right away. 

Missed Dose

If you have missed any of the phentermine doses, skip the dose and take the next pill at the regular time. 

Do not try to cover or add the missed dose with the regular dose. It’ll cause overdose effects. 

Adderall

Adderall contains amphetamine and dextroamphetamine, which work on certain brain substances and treat attention deficit hyperactivity disorder (ADHD). 

Adderall is a stimulant drug that helps you keep attention, increases your focusing capacity, and helps you stay stable. 

It’s also used to treat some sleeping disorders such as narcolepsy. 

adderall capsule 20mg
adderall capsule 20mg

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Uses

Take this medication by mouth with or without food. Usually, doctors prescribe this drug three times a day at 4 to 6 hours intervals. 

Take this medication as the doctor recommended. 

Overdose can cause sleep disturbance. Do not overdose on this medication. 

The doctor will ask you for a follow-up to observe the improvement and adjust the doses. 

Take this medication at the same time each day and regularly to get the best result out of it. 

Side Effects

The common side effects of Adderall may include;

  • Loss of appetite
  • Weight loss
  • Stomach upset
  • Dry mouth
  • Dizziness
  • Headache
  • Nausea and vomiting
  • Diarrhea 
  • Difficulty sleeping

This drug can raise your blood pressure progressively. Check up your blood pressure regularly. If you notice anything unusual, then talk to your doctor. 

If you experience any serious side effects such as; abnormal heartbeat, difficulty breathing, severe headache, etc., talk to your doctor right away. 

Adderall very rarely increases the serotonin level such high to cause serotonin toxicity. However, during the follow-ups, the doctor will diagnose it and change the dosage if it occurs. 

So, it’s important to visit the doctor for follow-ups. 

Warnings

Talk to your doctor if you are allergic to any medication. For example, Adderall may cause an allergic reaction to some users. 

Make sure your doctor knows your’s

  • Drug history
  • Family history of disease and conditions
  • High blood pressure
  • Diabetes
  • Glaucoma
  • Addiction to drug or alcohol
  • Smoking history
  • Lung conditions
  • Stoke or any hemorrhage history
  • Kidney disease
  • Seizures

This medication may cause vision disturbance and dizziness. Do not work in danger while you are experiencing these side effects. 

Talk to your doctor frankly if you are a drug addict. 

Drug Interactions

Adderall does not interact with other drugs. 

Adderall - amphetamine molecular model
Adderall – amphetamine molecular model

If you are taking other drugs with Adderall, make sure your doctor knows it. 

Don’t forget to mention any herbal products if you are using any. 

Overdose And Missed Dose

Overdose

Overdose of Adderall may cause difficulty breathing, unconsciousness, and other conditions. If you have overdosed, call the emergency health service right away. 

Missed Dose

If you have missed any of the Adderall doses, skip the dose and take the next pill at the regular time. 

Do not try to cover or add the missed dose with the regular dose. It’ll cause overdose effects. 

 

Phentermine Vs Adderall Effectiveness

Phentermine is a specific weight loss drug, which acts better with exercise, a balanced diet, and a healthy lifestyle. 

On the other hand, Adderall is a stimulating drug for ADHD, and its side effect leads to weight loss. 

According to a study, 11% of Adderall users experienced weight loss. 

As Phentermine is a specific weight loss drug, the doctor usually prescribes this medication for weight loss. 

However, it depends on your medical history, obesity condition, and other factors that would act better on you. 

Phentermine helps you in the best way to lose weight while you are exercising and maintaining a proper diet. 

 

Phentermine Vs Adderall Side Effects

Both Phentermine and Adderall have some side effects. However, if you take medicine at the same time each day and take it as the doctor recommended, you may not experience any side effects. 

You can avoid most of the side effects if you take medicine properly. Read the instruction provided with the medication.

Overdose and missed doses should be avoided. 

Taking pills late should also be avoided. 

 

Phentermine Vs Adderall Consideration

Phentermine is prescribed as it is a specific drug for weight loss. On the other hand, Adderall is prescribed when the patient is not suitable for Phentermine. 

Adderall can change your behavior and cause many complications. 

If someone has only a weight problem, then the first choice is always Phentermine. 

Therefore, if somebody has Attention Deficit Hyperactivity Disorder (ADHD) and obesity, Adderall can be a suitable option. 

Please consult with your doctor; he will evaluate your health status and other condition and choose the best one for you. 

 

Phentermine Vs Adderall Summery

Phentermine is a weight-loss drug, and Adderall is a drug for treating ADHD. 

Adderall is also prescribed sometimes for weight loss as its principal side effect is weight loss. 

Both drugs are stimulants and have some side effects. The doctor evaluates the conditions and chooses the best one between them. 

Last Updated on April 9, 2022 by Learn From Doctor Team

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