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Buy Phentermine Online

What is Phentermine?

Phentermine is a prescription drug that comes as an oral tablet, oral capsule, and an orally disintegrating tablet. The oral capsule of Phentermine is available with the brand name Adipex-P that helps treat obesity for the short term (for a few weeks). 

Phentermine aids in weight loss in overweight and obese people with specific health risk factors, including high cholesterol, high blood pressure, and diabetes. Doctors recommend taking Phentermine with a whole treatment program that consists of a low-calorie diet, exercise, and other behavior changes to lose weight. 

Phentermine belongs to the anorectics category of drugs that works to help you lose weight. It functions by increasing chemical release in your brain that helps reduce your appetite. This way, it enables you to eat less and results in weight loss. 

Important Information

Phentermine may cause allergic reactions, and symptoms can include: trouble breathing, swelling in your face, throat, lips, or tongue. If these signs persist or worsen with time, call 911 or go to the nearest medical emergency center. 

Do not use this drug again if you have ever had an allergic reaction to it or phendimetrazine tartrate. Retaking it can cause dangerous side effects or death. 

Please do not use it during pregnancy. It can pass through the milk and prove harmful to a nursing baby. So, avoid taking Phentermine while breastfeeding.

What to know before taking Phentermine?

Before taking Phentermine, you must know that it can interact with alcohol, and it is unsafe to take it if you have certain health conditions, including people with:

  • A history of PPH (primary pulmonary hypertension)
  • A past of heart disease to the individual or in the family
  • A past of hyperthyroidism or overactive thyroid
  • Diabetes 
  • Any individual or family history of any substance use disorder, including drug abuse, misuse, or alcohol addiction
  • Anger and agitation issues

How to take Phentermine?

Take Phentermine precisely as per your doctor’s directions, usually one time a day, one hour before breakfast, or an hour or two after breakfast. According to your medical requirements, your doctor may adjust your dosage to a small dose up to three times a day. Taking Phentermine late in the day may lead to trouble sleeping (insomnia).

If you are taking sustained-release capsules, you may need to take your dose one time a day before breakfast or about 10 to 14 hours before bedtime. Swallow the whole medicine rather than crushing or chewing it. Doing so with a sustained-release tablet can increase the risks of side effects. 

Phentermine dosage

Phentermine is an oral capsule available in the strengths of 15 mg, 30 mg, and 37.5 mg. 

Usual adult dosage (ages 18 to 64 years) for obesity:

  • Phentermine 15 mg and 30 mg capsules: Usual initial dose- one 15 mg or 30 mg capsule every day. Take it two hours after breakfast in the morning.
  • Maintenance amount- if your doctor gave you a 15 mg dose initially, they may increase it depending upon your weight loss and how you tolerate the drug.
  • Maximum quantity- 30 mg per day

Usual child dosage (age 16 to 17 years):

  • Generic Phentermine 37.5 mg capsule: typical initial dose- one 37.5 mg capsule every day. Take it an hour or two after breakfast in the morning. The maximum amount is 37.5 mg per day.
  • Phentermine 15 mg and 30 mg capsules: Usual initial dose- one 15 mg or 30 mg capsule every day. Take it two hours after breakfast in the morning.
  • Maintenance amount- if your doctor gave you a 15 mg dose initially, they may increase it depending upon your weight loss and how you tolerate the drug.
  • Maximum quantity- 30 mg per day

Phentermine is not under the recommendation for use by anyone younger than 16 years old and older than 64 years old.


In case of an overdose of Phentermine, take medical help or call the Poison helpline at 1-800-222-1222. An overdose of any form of Phentermine can be fatal. Overdose symptoms may include panic, confusion, extreme restlessness, hallucinations, vomiting, nausea, stomach cramps, diarrhea, irregular heartbeats, feeling tired or depressed, seizure, weak pulse, or slow breathing that may stop. 

What to avoid while using Phentermine?

Avoid consuming alcohol in any form while taking this medicine because it can result in dangerous side effects or death.

Do not take other medications before adequately consulting with your doctor. It includes prescription and nonprescription (over-the-counter) medications, herbal remedies, dietary supplements, or medicines for asthma, appetite control, cough, colds, sinus problems, and hay fever. 

Phentermine side effects

Phentermine oral capsules rarely cause drowsiness, but they may cause trouble sleeping. Phentermine’s more common side effects can include vomiting, dry mouth, headache, diarrhea, constipation, and bad taste in your mouth. These signs may vanish after a few days or a couple of weeks. If it persists or worsens, contact your medical healthcare provider. 

Immediately call your doctor if you have severe side effects. Call 911 if you feel your signs are life-threatening or you think you have a medical emergency. Severe side effects to Phentermine may include:

  • Primary pulmonary hypertension, a blood pressure type that affects the arteries in your lungs and the right side of your heart. Symptoms can include dizziness, chest pain, tiredness, cyanosis, shortness of breath, heart palpitations, swelling of your ankles and legs;
  • Valvular heart disease including fainting or lightheadedness, heart murmur, heart palpitations, irregular heartbeat, edema, chest pain (angina), chest tightness or discomfort that get worse frequently during exercise, shortness of breath, weakness, and fatigue, significantly when you increase the activity level;
  • High blood pressure;
  • Erectile dysfunction in men;
  • Restlessness;
  • Trouble sleeping; or
  • Uncontrollable rhythmic movement in a specific part of the body

What drugs can interact with Phentermine?

Phentermine oral capsules can have interaction with other medications, herbs, or vitamins you may be taking. Interaction of a substance with Phentermine can change the working of a drug. 

To avoid such drug interactions, do not take the following drugs or class of drugs with Phentermine:

  • Monoamine oxidase inhibitors such as selegiline, rasagiline, isocarboxazid, phenelzine, and tranylcypromine
  • Other medications for weight loss such as benzphetamine, amphetamine, diethylpropion, dextroamphetamine, and phendimetrazine
  • Serotonin reuptake inhibitors include sertraline, fluoxetine, paroxetine, fluvoxamine, escitalopram, citalopram, and nefazodone.