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Phentermine hydrochloride is a drug whose generic name is Phentermine. Phentermine is a medicine that is used in the treatment of weight loss. phentermine is a doctor-approved medicine. The doctor prescribed this medicine to that person who is overweight and suffering from clinical obesity. The use of phentermine is very common in the USA and Australia. It helps to decrease appetite and helps you to weight lose after maintaining a low-calorie diet or doing doctor-prescribed exercise. Phentermine is also prescribed(off-label) sometimes to treat hyperactivity disorder(ADHD)

Phentermine prescription

Phentermine is online available for those people who have doctor prescriptions. If you buy it from other illegal sources for taking it, you put your life in danger because phentermine is highly effective so its side effect is also dangerous.

How to use Phentermine?

The use of phentermine is different for different patients. Always take the amount of dose according to your doctor. This information could be different from your dose always following your doctor’s dose. The dose which we take depends upon the strength of the medicine.

In the treatment of obesity we will follow this amount of dose-:

  • For adults or children who are 17 years of age, it can take 15 -30 mg once a day.

If we talking to the amount of disintegrating tablets-:

  • For adults or children who are 17 years of age, it can take one tablet once a day in the morning before taking breakfast.
  • Also, you can take 8 mg of phentermine three doses a day.

What do you need to know before taking Phentermine?

First of all, you need to know FDA-approved phentermine as a weight-loss drug.

Never take phentermine while you drink alcoholic products such as wine, rum, etc. if you are thinking to take Phentermine medicine you also need to  strictly

Follow doctor’s instructions like always following a diet chart, doing all doctor prescribed exercise, or some other things. Should not eat other medicine while you take phentermine.

What are the benefits of taking Phentermine?

Phentermine takes 3-4.4 hours to go to peak concentrations and you should start feeling the effects. Some reports say that phentermine takes only one week to lose one extra pound. If we are talking about the average percentage of weight loss, after taking phentermine is 2.5% of your initial body weight after 3 months and 6% after 6 months. After taking phentermine your heartbeat and pulse rate boost and you fully feel energetic due to you feeling motivated to complete your workout like for gym, running, or for another exercise.

The side effect of taking Phentermine pills

Phentermine is a powerful and effective medicine if we take phentermine pills without following precautions, we can face some acute or serious side effects. Some of the side effects are here-:

Acute side effects

  • Dry mouth
  • Headaches
  • Skin rash or itching
  • Stomach upset
  • Diarrhea and constipation
  • Swelling of the feet
  • Some mental issue also happens
  • Weakness in muscle

Serious side effects

  • High chest pain
  • Trouble breathing
  • Highly increment in a heartbeat
  • Tremors and restlessness

If you feel any of these side effects immediately inform your doctor.

Warning and precautions regarding phentermine

US FDA approved Phentemine only for short-term uses not up to 12 weeks. They mainly provided a dose for phentermine of around 15 – 37.5 mg once a day before taking breakfast.

Phentermine is only used after being suggested by the doctor. Never suddenly stop taking Phentermine otherwise you face symptoms like tiredness, depression, weakness. If you want to prevent these symptoms firstly take a consult from the doctor and slowly lower your dose. Phentermine helps many people to lose weight but for some people, it turns into cause addiction. Never do alertness work like driving cars or operating machinery while effects of phentermine are present on your body because phentermine makes you drowsy. Do not drink alcohol while you eat phentermine because alcohol can make the side effects of phentermine worse. If you are suffering from diabetes you need to lower your insulin dose while taking phentermine. If you feel medicine is not working call your doctor at once for a consultant.

How to store Phentermine?

Put this medicine into an airtight container and out of reach of children. Always store Phentermine at room temperature and away from humidity or high temperature. Not stored any expired pills always disposed of expiring or unneeded pills. Disposing of medicine in such ways to ensure that pets, children, and other people can not get it. If you want to know the safe way to dispose of medicine you can check FDA-safe disposal medicines websites.

Drugs interactions

Drug interactions can change the working of your medicine and increase the risk of serious side effects. We inform some of the drug interactions. Firstly make a list of all the things which you use(all drugs) and share with your doctor. If you have ever taken an appetite-suppressant drug-like diethylpropion, ephedra/ma huang, etc. inform your doctor.

Never take MAO inhibitors like metaxalone, methylene blue, moclobemide with Phentermine medicine. And also not take Phentermine within 2 weeks of stopping an MAO inhibitor. Because you can face some serious problems after using both medications several times.

Some common medications that may interact with Phentermine include:

  • Antacids like anteragel,Alka-seltzer.
  • Strattera(atomoxetine)
  • Lithium
  • Opioids
  • Phenylephrine
  • Venlafaxine
  • Isoproterenol
  • venlafaxine

What if you take an overdose of Phentermine?

mainly your dose depends on your age, what is your problem, and any other factors.

If you are an adult you can take 8 mg three times once a day before half-hour of your meal.

And you will also take 15mg to 37 mg according to your condition but once a day. If you take an extra dose without the permission of the doctor it can be an overdose. Overdose of Phentermine can be dangerous for health. If you take an overdose of phentermine and you feel these symptoms like confusion, stress, vomiting, cramps, high or low heartbeat, trouble breathing immediately inform your doctor. After taking a Phentermine overdose you feel any trouble call your doctor.

What happens if I miss a dose?

Inform your doctor and take a consult. If you miss a dose skip it and another time not tries to take two doses at one time. Because, if you take overdose you can face some health issues and sometimes it can be serious.

What are the common doses of phentermine?

Doses depend upon many factors like what is your health condition, how many doses are doctor prescribed you. But two common doses for adults is

  • 8 mg three at a day.
  • 15 – 37 mg once a day in the morning.


How long does it stay in our bodies?

The presence(half-life) of Phentermine in our body is approx 24 hours. We can say that Phentermine can stay in our system for around 4 days. But it also depends upon other factors like how urine is acidic if our urine is acidic so phentermine is eliminated fastly.

Is it legal to buy Phentermine?

Phentermine can be bought when you have a valid prescription.  If you buy phentermine without any prescription it is illegal. Phentermine can also be bought over the counter but with a doctor’s prescription. Phentermine is only used to get short-term solutions or in emergency cases. Phentermine is taken orally in the form of tablets and capsules.

Do you need a prescription for Phentermine?

Yes, you need a valid prescription to buy Phentermine because Phentermine is a strong medication so its side effects are serious. If you purchase Phentermine from other alternatives you put your life in danger. Giving or selling Phentermine without prescription is against the law.

Is it ok to drink coffee on Phentermine?

In coffee, the presence of caffeine is high. If you take caffeine or Phentermine at a time they both can cause insomnia, abnormal heartbeat. You should avoid drinking coffee while you are on Phentermine because it increases the chance of side effects.

What amount of water can I drink while taking Phentermine?

We all know that water is the most necessary thing for our existence. If we are talking about how much water we need to drink while taking Phentermine? You need to drink at least 8 to 10 glasses of water a day. Because of the good working of our body and staying hydrated.

Can I drink alcohol with Phentermine?

Never should drink alcohol while you are on Phentermine. Alcohol interacts with phentermine and becomes the cause of some major serious health problems.  You Should Avoid Drinking alcohol while you are on Phentermine. If you are addicted to alcohol you should inform the doctor first before taking Phentermine.

Can I drive on Phentermine?

Phentermine makes you drowsy or fully charged so do not drive a vehicle or not operate any machinery to avoid any accident or major injury. Phentermine works on your body and increases your heartbeat or pulse rate. Sometimes this medicine may cause some people abnormal behavior, irritability, or other side effects.