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Adipex vs Vyvanse for Weight Loss and ADHD

Adipex vs Vyvanse

All over the world, people have to deal with various health conditions due to various reasons. Obesity is a health condition that occurs due to foods with high fat and sugar. The symptoms of this condition are high blood pressure, type 2 diabetes, osteoarthritis, gastro-oesophageal reflux disease (GORD), gestational diabetes, sleep apnea, etc. To treat this condition people use a medicine namely Adipex.

ADHD is a problem that causes hyperactivity and impulsivity in adults and children. It includes several symptoms such as trouble paying attention, lack of focus, disorganization, and so on.

Today we are going to describe the comparisons between Adipex and Vyvanse drugs, that is, ‘Adipex vs Vyvanse’ in this blog.

Comparison Between Adipex vs Vyvanse Drugs

Adipex and Vyvanse medicines can be compared depending on various factors.

What is Adipex?

Adipex is a medication drug that is used in the treatment of obesity in individuals. It is a branded drug that contains an active ingredient called Phentermine Hydrochloride.

The function of this medicine is to decrease appetite which helps in improving the health of those people who are unable to lose weight by regular exercises and a healthy diet. The half-life of this weight loss medicine is 20 hours.

What is Vyvanse?

Vyvanse is a medicine that is mainly used in treating ADHD symptoms in individuals. This branded drug contains an active ingredient called Lisdexamfetamine Dimesylate. It is also used to cure binge eating Disorder (BED) in people.

Vyvanse drug works by improving attentiveness and decreasing hyperactivity and impulsivity, which provides proper attention to individuals. It has a half-life of 1 hour in a person’s body.

Dosages of Vyvanse and Adderall Drug:

The forms and strengths of both these medication drugs are different as follows-


Adipex drugs consist of different dosages in treating obesity in adults and children above 16 years of age. It is in the form of an oral tablet only and the dosage strength of this form is Adipex-P 37.5 mg.

Adults and children can take the dosage strength of this drug 12 hours before or 1 or 2 hours after breakfast to maintain their weight.


The dosages of Vyvanse medicine can be used to treat ADHD symptoms in adults and children above 6 years of age. The forms of this drug are chewable tablets and capsules.

The dosage strengths of chewable tablets are 40 mg, 10 mg, 60 mg, 30 mg, 20 mg, and 50 mg, whereas oral capsule has dosage strengths of 50 mg, 20 mg, 30 mg, 10 mg, 70 mg, 40 mg, and Vyvanse 60 mg.

People can take the starting dose of Vyvanse 30 mg but they are not suggested to take more than 70 mg in a day when suffering from ADHD condition. Doctors increase this dosage strength by 10 mg or 20 mg in the duration of 1 week.

Those adults who are suffering from binge eating Disorder (BED) can take this medication drug for the treatment of this problem. The starting recommended dose of Vyvanse medicine is 30 mg a day. If this dosage strength is not able to treat BED symptoms properly, then it is increased by 20 mg for the duration of 1 week. The maximum dosage that can be taken in 24 hours is 70 mg.


The potency of the Adipex drug is low, whereas the Vyvanse medication drug has the highest potential in treating problems in individuals.

Color and shape

Both the medicine is in different colors and shapes. Read the following colors and shapes of Adipex and Vyvanse medicines:


Adipex medicine is white and blue in color. The shape of this medication drug is oval.


The colors of the Vyvanse drug are blue, white, green, beige, orange, and pink. This medicine is rounded in four-sided, six-sided, three-sided, and oblong shapes.

Drug Interactions: Adipex vs Vyvanse

The drug interactions of both these medication drugs are different. Below are the following drug interactions of Adipex and Vyvanse drugs:


Adipex drugs may interact with various medications and may increase the side effects. Some of these drugs are Milnacipran, Procarbazine, Vilazodone, Haloperidol, Ethanol, Fenfluramine, Diethylpropion etc.


There are various medicinal drugs that can interact with Vyvanse medicine. A few of them are Amisulpride, Bedaquiline, Casanthranol, Clozapine, Doxorubicin, Dexmethylphenidate, Maprotiline, Mobocertinib, Propoxyphene, Pseudoephedrine and so on.

Side Effects of Both Drugs

The overdose or improper use of Adipex and Vyvanse medicines causes side effects in individuals. Read the following side effects of these two medication drugs:


The side effects of Adipex drug are as follows:

  • Diarrhea
  • Headache
  • Swelling in feet or lower legs
  • Dryness in mouth
  • Bad or unpleasant taste
  • Redness or irritation in skin or eyes
  • Heart palpitations
  • Upset stomach (Indigestion)
  • Muscle tremor
  • Skin rashes, itching, hives or welts
  • Inability to maintain erection
  • Constipation
  • Sweating
  • Lower back pain
  • Overstimulation
  • Blurred vision
  • Sleeping problem (Insomnia)
  • Cardiac arrest
  • Agitation (severe anxiety)
  • Stomach pain


Vyvanse causes several side effects in people. These are the following:

  • Dizziness, lightheadedness or fainting
  • Drowsiness
  • Difficulty in breathing
  • Chest pain
  • Behavioral or mood change
  • Hallucinations
  • Bradycardia
  • Fast or irregular heartbeat
  • Nausea and vomiting
  • Abdominal pain
  • Fatigue
  • Euphoria
  • Shivering
  • Dysphoria
  • Speaking problem
  • Tachycardia
  • Weakness in muscle or muscle pain
  • Paranoia
  • Appetite or weight loss
  • Skin discoloration in fingers and toes

Precautions to be Taken During These Medicine Treatment

  • If an individual is suffering from breathing problems, asthma, stomach pain, allergy, etc after taking Adipex or Vyvanse medicine, then he or she must contact the doctor immediately.
  • Adipex or Vyvanse medicine should not be suggested for pregnant women and breastfeeding mothers. They must consult with the doctor during pregnancy and breastfeeding.
  • Avoid drinking grapefruit juice after taking any of these medication drugs as the effect of Adipex or Vyvanse medicine will get delayed in the human body.
  • Driving a vehicle or performing any other tasks is strictly prohibited after taking Adipex or Vyvanse drug. If a person drives a car or any other vehicle then it will be dangerous for him or her.
  • A person should not smoke or drink alcohol after taking any of these branded medication drugs since it causes dizziness and damages the liver which can be harmful to his or her health.
  • Taking more than one tablet of Adipex or Vyvanse drug is strictly prohibited for individuals since it causes severe problems that can harm their body health.


In conclusion, Adipex and Vyvanse are both used for different health conditions. Overweight people use Adipex medicine to reduce weight. On the other hand, Vyvanse is used for curing Attention Deficit Hyperactivity Disorder (ADHD). The working function of both medications is also different. It is important to consult with a doctor before using both the medications.

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