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Best Coupons For Phentermine

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Best Coupons for Phentermine

Type Dosage Quantity
    • Phentermine

      30 Capsules
    • $9.74

      Discounted Price
    • Phentermine

      30 Capsules
    • $10.58

      Discounted Price
  • 3
    • Phentermine

      30 Capsules
    • $10.69

      Discounted Price
  • 4
    • Phentermine

      30 Capsules
    • $10.99

      Discounted Price
  • 5
    • Phentermine

      30 Capsules
    • $11.40

      Discounted Price

This article is not medical advice. Always seek the advice of your physician or use the medication guide.

Phentermine Information

What is Phentermine?

Phentermine is a prescription-only drug used to induce weight loss by suppressing appetite. Phentermine hcl is used alongside a low-calorie diet program and a doctor-approved exercise regimen to help overweight people who are at the risk of obesity.

It’s also prescribed to individuals prone to other weight-related medical problems, including diabetes, high blood pressure, and heart disease.

Generic Phentermine hydrochloride received the FDA approval for prescription in 1959. It belongs to a class of medicines called sympathomimetic amines or appetite suppressants. Phentermine has pharmacological effects similar to amphetamines. For that reason, it’s a controlled substance in most countries. In the USA, Phentermine is listed under the Controlled Substances Act as a Schedule IV substance.

Phentermine brand name

Phentermine is available as a generic drug, but you’ll also find it under the following brand names;

  • Adipex P.
  • Lomaira

Phentermine Forms and Strengths for Adults and Children

Phentermine drug is sold in different forms and strengths listed below;


  • 8mg
  • 15mg
  • 30mg
  • 37.5mg


  • 15mg
  • 30mg
  • 37.5mg

How to Take Phentermine (Proper use)

Your doctor will advise you on how to take Phentermine and the duration after analyzing your medical history, vitals, and weight status. This drug is effective for the first few weeks only, so it’s important to adhere to your doctor’s advice for excellent Phentermine results.

Phentermine weight loss pills are best taken in the morning 1 hour before or 2 hours after breakfast. As a stimulant, taking Phentermine 30mg in the hours leading to bedtime may cause trouble falling asleep.

The typical dosage for Phentermine is a single tablet a day. However, your doctor may recommend smaller doses taken orally for 2-3 times a day, depending on your condition. Do not adjust the dosage unless with instructions from a medical practitioner. Please, note that taking higher amounts of Phentermine doesn’t make it more effective. If anything, it only puts you at a higher risk of adverse effects.

If you’re using Phentermine diet tablets or pills, you should swallow them with a glass of water. You may split the tablets into 2 for easy swallowing, but you shouldn’t crush them in the mouth. However, Phentermine capsules may not be divided; they should be swallowed full.

Can you snort Phentermine?

Snorting Phentermine is common among drug abusers, and it’s not safe. If you’re using Phentermine legally to control weight or treat obesity, the best way to take it is by mouth. Crushing and snorting Phentermine tablets or capsules bypasses the gradual release and intake of the drug via the stomach lining. This means that the medication reaches your brain fast and may increase the risk of overdose and dependency.

Phentermine not working

Since this Phentermine is a short-term medication, consult your doctor if you think that it’s not working. Precisely, you should lose at least 4 lbs within 4 weeks after starting the medication.

If you’ve been taking Phentermine high doses for a prolonged time and want to stop, you’ll need to taper off the drug by lowering the dosage gradually. Stopping the medicine abruptly may cause Phentermine withdrawal symptoms, including;

  • Fatigue
  • Weight gain
  • Bad mood
  • Lightheadedness
  • Insomnia/sleep change
  • Cravings for Phentermine
  • Headache
  • Irritability
  • Tremor

Importantly, you should discontinue the drug if you’ve developed tolerance. Do not increase the dosage to overcome tolerance, as this may eventually lead to dependence and addiction.

Phentermine Dosage for Obesity


Adults and children 16 years and above

  • Take 15-37.5 mg Phentermine orally once per day. You can also divide the dose into two and take in intervals of 12 hours. Take Phentermine before breakfast or 1-2 hours after breakfast.


Adults and children 16 years and above

  • Take 8mg orally three times a day before meals.

Missed dose

If you’re taking a single dose of Phentermine every day, you may take the missed dose as soon as you remember during the day. However, since this drug causes sleep problems, you may want to skip the dosage if it’s too close to bedtime. Again, if you’re taking small doses of Phentermine pills 2-3 times a day, skip the missed dosage if it’s almost time for your next dose. Never take a double dose of Phentermine to make up for a missed dose.

Overdose- Is Phentermine safe?

Phentermine 37.5 mg is the maximum amount that you can take in a single day. Taking a higher amount of Phentermine weight loss drug may be fatal.

Phentermine overdose symptoms

  • Hallucination
  • Confusion
  • Extreme restlessness
  • Irregular heart rate
  • Nausea
  • Diarrhea
  • Vomiting
  • Slow breathing
  • Weak pulse

If you suspect Phentermine overdose, contact the Poison control center immediately at 1-800-222-1222. However, call 911 for emergency help if the patient has fallen and isn’t responding.

Phentermine uses

What is Phentermine used for? Phentermine is used to treat obesity and boost weight loss regimens. This prescription drug is structurally similar to amphetamine and works by suppressing appetite and making you feel full longer. It’s not a magic pill, though. It’s often prescribed alongside exercises and a low-calorie diet.

Before using Phentermine

  1. Don’t take Phentermine if you’re allergic to it. Also, talk to your doctor if you’ve had an allergic reaction to other diet pills.
  2. Don’t breastfeed while taking this medication. 3.Talk to your doctor first if you abuse or have a history of drug abuse.
  3. You should not take this drug if you’re pregnant. Tell your doctor if you get pregnant mid-therapy.
  4. Don’t take Phentermine if you have any of the following medical conditions;
  • Severe blood pressure
  • Nervousness or severe agitation
  • Glaucoma
  • Overactive thyroid
  • Heart-related disease
  • Talk to your doctor first before taking Phentermine if you have;
  • High blood pressure
  • Kidney disease
  • Heart valve disorder
  • Coronary artery disease
  • Diabetes

Phentermine and Allergies

An allergic reaction directly linked to Phentermine is rare. However, if you’ve ever developed an allergy after taking this drug, retaking it may cause severe Phentermine effects. Again, on rare occasions, Phentermine may cause a severe reaction with symptoms, such as;

  • Severe dizziness
  • Trouble breathing
  • Itching and swelling on the face, throat, and tongue
  • Rash

Phentermine drug interactions

There are over 160 prescription and over-the-counter drugs that have mild or severe interactions with Phentermine. The list below does not include all the drugs that interact with Phentermine. So, inquire from your doctor about any other medicines that you’re taking before mixing them with Phentermine.

Drugs with mild interactions with Phentermine

  • Metformin
  • Saxenda
  • Topamax
  • Synthroid
  • Desmopressin
  • Guarana
  • Eucalyptus
  • Sage
  • American ginseng
  • Amantadine
  • Yerba mate

Drugs with severe interactions with Phentermine

  • Contrave
  • Cymbalta
  • Effexor
  • Prozac
  • Lexapro
  • Wellbutrin
  • Wellbutrin XL
  • Zoloft

Phentermine and pregnancy

Phentermine (Adipex P. generic) is in US FDA pregnancy category X. Studies show that administration of this drug in animals and human beings leads to fetal abnormalities. That said, pregnant women should not use the drug.

Phentermine and Breastfeeding

There is currently insufficient data on the effects of taking Phentermine while lactating. However, considering its potential risks, most medical practitioners recommend not breastfeeding if you’re taking it.

Pediatric use

Phentermine diet pills are approved for use by patients 16 years old and above. There are very few diet pills that are considered safe for children. The most popular one is Orlistat, which is recommended for kids at least 12 years old.

Phentermine warnings

  • Phentermine is used as a short term diet pill. Prolonged usage may cause dependence and addiction.
  • This drug is not approved for use by patients below 16 years.
  • An overdose of Phentermine can be fatal. Always follow your doctor’s instructions and don’t adjust the dosage.
  • Phentermine is in the US FDA pregnancy category x. It has a high risk of causing fetal abnormalities if taken during pregnancy.
  • You should not take this drug if you’re allergic to it or other Phentermine ingredients.
  • You should not take Phentermine if you have glaucoma, uncontrolled high blood pressure, and history of heart-related disease.

Phentermine side effects dangers

What are the side effects of taking Phentermine 37.5 mg?

Common side effects (mild)

  • Dizziness
  • Headache
  • Itching
  • Unpleasant taste
  • Dry mouth
  • Constipation
  • Stomach pain
  • Diarrhea

Serious side effects

Consult your doctor if you experience any of the following side effects;

  • Uncontrolled muscle movement
  • Fast or irregular heartbeat
  • Mood changes (nervousness and uncontrolled anger)
  • Sexual dysfunction

Rare but severe Phentermine side effects

Stop the medication and seek emergency medical care in case of any of these symptoms;

  • Severe headache
  • Seizure
  • Slurred speech
  • Weakness
  • Changes in vision

Short-term Phentermine side effects

  • Increase in blood pressure

Phentermine long term side effects

Long term effects of Phentermine include heart and lung problems. These effects are rare and come with prolonged use of this drug. Combining Phentermine with other diet pills may also increase your risk of these conditions. Symptoms such as swollen legs and ankles, difficulty breathing, chest pain, and exercise intolerance are pointers of long term Phentermine effects. You should stop the medication and consult your doctor immediately.

Proper storage of Phentermine

This drug should remain in its original package and stored in a cool and dry place. Protect it from direct sunlight, heat, and moisture and keep it away from children’s reach. None of this drug’s forms should be refrigerated or frozen.

Phentermine cost

Phentermine 37.5 is generally inexpensive, but the price varies by a few dollars between different stores. Costco has the lowest price for a dose of 30 tablets (Phentermine 37.5 mg tablet) at around $23. On the pricier side is Rite Aid at $47 for the same dosage. Phentermine Walmart price is about $26. All the prices mentioned here are without a Phentermine coupon. The best price for Phentermine with a coupon ranges between $11 and $18. Consider the coupons at the top of this page for the best prices of Phentermine at a store near you.

How does Phentermine work- Mechanism of Action

At clinically approved doses, Phentermine works by releasing norepinephrine in neurons. It also leads to the secretion of serotonin and dopamine. Moreover, Phentermine is thought to trigger VMAT2 to release monoamines. All of these effects are known to constitute Phentermine’s ability to suppress hunger, which is crucial in weight management. In addition, Phentermine works outside the brain by triggering the release of adrenaline and noradrenaline, which causes fat cells to start breaking down stored fat.

Is Phentermine a narcotic?

Phentermine (Adipex P. generic) has chemical and structural similarities to amphetamine. This drug stimulates the central nervous system (CNS) as amphetamines do, and it’s, therefore, often abused. For that reason, Phentermine is classified as a controlled substance in most countries. Phentermine is categorized under narcotics in France and as a Schedule IV controlled substance in the US. Schedule IV drugs in the USA are accepted for medical use despite their potential risk of causing physical dependence when abused.

How long does Phentermine stay in your system?

Phentermine half life is around 20 hours. Half-life refers to how long the body takes to metabolize 50% of the medication. Lab experts have established that Phentermine is detectable for 5 to 6 half-lives on standard urinalysis tests. So theoretically, Phentermine stays in your system for 5 to 6 days.

How to flush Phentermine out of your system

Your body will gradually flush out Phentermine metabolites from your system in around 2 days after you stop the medication. Keep in mind that this drug is stored in your fats. So, your body may take longer to eliminate it. This happens, especially if you’ve taken the medicine for a long time and have a higher percentage of body fat.

For that reason, there’s no surefire way of speeding up the process of flushing out Phentermine, although exercising and drinking a lot of water may help. If you’re on a Phentermine prescription dosage, the chances are that you’ll take it for several weeks. So, you’ll need to plan if you’re scheduled for a Phentermine drug test.

Phentermine and Topiramate

Phentermine topiramate is a combination extended-release drug commonly marketed as Qsymia. This medication consists of Phentermine and Topiramate. Topiramate is also known as Topamax, and it’s an anticonvulsant drug also used to treat epilepsy. Phentermine topiramate extended-release capsules are used in combination with exercises and diet to manage obesity.

Qsymia vs Phentermine

Phentermine and Qsymia are prescribed to aid in weight loss, and they are among the most popular anti-obesity medications. Performance-wise, Phentermine 37.5 reviews suggest that it’s more effective. Phentermine is several folds cheaper than Qsymia, too. The other difference between Qsymia and Phentermine is in their half-lives. Qsymia has a half-life of around 65 hours, while that of Phentermine is about 20 hours.

Contrave vs Phentermine

Both of these are prescription-only drugs used alongside a low-calorie diet and exercises to help in weight loss. Contrave is a combination drug comprising of 8mg of Naltrexone and 90mg of Bupropion. Unlike Phentermine, Contrave is less likely to cause dependency, so it’s not a controlled substance in the US. However, both are in pregnancy category X, and shouldn’t be used during pregnancy.

Although these drugs are similarly effective in managing weight, Phentermine use is only recommended for a few weeks. On the other hand, Contrave is approved for long-term use in patients with a BMI of at least 30kg/m2. Patients with a BMI of at least 27kg/m2 and another medical condition, such as diabetes or high cholesterol, may use it too.

Another significant difference between these medications is that while Phentermine is a generic drug, Contrave is currently available as a brand drug only. That said, Contrave is often 3x pricier than Phentermine.

Phentermine vs Adderall

Phentermine and Adderall are generic medications available for prescription only. Although both of these drugs are classified as stimulants, they are recommended for entirely different purposes. Phentermine is mainly used as a weight loss aid. On the other hand, Adderall, a combination drug of Amphetamine and Dextroamphetamine, is prescribed for ADHD and narcolepsy. Enquire from your doctor on which of these two is ideal for your condition.

Belviq vs Phentermine

Phentermine and Belviq (Lorcaserin hydrochloride) are both recommended for weight loss. However, these drugs belong to different classes and will, therefore, cause varying side effects. While Phentermine (Adipex P. generic) is an appetite suppressant, Belviq is a serotonin receptor agonist. The other difference is that Belviq may be used for chronic weight loss management (up to 12 weeks), whereas Phentermine may only be used for short-term treatments of 3-6 weeks.

Phendimetrazine vs Phentermine

Phentermine and Phendimetrazine are used for weight loss and treating obesity. Both are prescription-only generic drugs and are recommended for short-term use due to their potential risk of dependence.

One of the differences between Phentermine and Phendimetrazine is in the recommended age limit. While Phentermine is prescribed for patients 16 years old and above, Phendimetrazine may only be used by patients who are at least 17 years old.

In terms of performance, many studies on Phendimetrazine (Bontril PDM) show that its weight effects are visible only for the first few weeks.

Adipex vs Phentermine

Phentermine and Adipex are similar in that the active ingredient in both is Phentermine hydrochloride. That’s to say that they are used for the same medical problems. Also, they have similar side effects and interactions with other substances (drugs and food).

The significant difference between them is that Phentermine is the generic version of Adiplex, which is branded. This explains why Phentermine is the most commonly prescribed of the two drugs.

Adipex and Phentermine differ in terms of strengths, too. While Adipex is available as a 37.5 formulation only, Phentermine comes in 8mg, 15mg, 30mg, and 37.5mg.

Phentermine and Prozac

Prozac is the brand name for Fluoxetine- an antidepressant used to treat the major depressive disorder (depression), obsessive-compulsive disorder, and panic disorder, among other conditions. Fluoxetine has the potential to increase the effects of Phentermine when the two drugs are taken together. This combination may also lead to adverse side effects, including restlessness, jitteriness, racing thoughts, and nervousness. Severe cases may lead to serotonin syndrome, which causes hallucinations, seizures, increased heart rate, or even death. Talk to your doctor before mixing these two medications.

Phentermine and anesthesia

The interaction between Phentermine and anesthetic agents used for inpatient and outpatient surgery have a serious medical warning. Sympathomimetics, such as Phentermine, have the potential to increase heart rate and blood pressure. This could increase anesthetic agents’ ability to alter the rhythm of the heart. If you’re scheduled for surgery, you may have to postpone Phentermine use for at least 7 days.

Can I buy Phentermine online safely?

Phentermine (Adipex P. generic) is a controlled substance. This makes over the counter Phentermine practically illegal and dangerous. So, can you buy Phentermine online? Well, the short answer is yes, but there are a few hurdles to jump.

In 2008, the Ryan Haight Online Pharmacy Consumer Protection Act of 2008 made it illegal to prescribe or distribute Phentermine online. However, in March 2010, a few changes were introduced that made it possible to buy real Phentermine online if you have a valid prescription. To obtain the prescription, you need to make at least one in-person visit to the doctor. Here’s how to order Phentermine online legally.

How to order Phentermine online

Step 1: Have an appointment with a DEA-registered practitioner

If you want to buy Phentermine 37.5 online, you first need to arrange for a one-on-one appointment with a qualified medical practitioner. Your primary care doctor may be the best option since he/she already understands your medical history and weight status. But there are other practitioners from other fields who may prescribe the drug, too, including gynecologists. You may also try searching for weight loss clinics that prescribe Phentermine near me or doctors who prescribe Phentermine near me.

Step 2: Inquire about Phentermine

At the doctor’s office, inquire as to whether you can get a Phentermine prescription for your weight loss goals. Due to the stigma and potential dangers of Phentermine uses, most medical practitioners may suggest a Phentermine alternative for your weight loss regimen instead.

Otherwise, the doctor will evaluate your weight status, medical history, and vitals. If you’re a suitable candidate, he/she will explain the potential risks and benefits of this drug and then hand you a prescription to fill at your retail pharmacy or mail-order pharmacy of choice.

Step 3: Filling your prescription

If you wish to buy Phentermine 37.5 online, your best option will be to fill the prescription at a DEA-accredited pharmacy and have the dosage delivered via mail. The only caveat is that the drug has to be covered by insurance, which is practically impossible.

Your next best option is to walk into a DEA-registered store and fill the valid prescription in-person. Remember to carry your ID as the store has to remain in compliance with DEA requirements.

Step 4: Online refills

After filling the prescription in-person at the store, most pharmacies, including Walmart, Walgreens, CVS, Kroger, and Kaiser Permanente, allow online refills. Inquire from your favorite pharmacy whether this option is available beforehand.

Can you buy Phentermine without dr prescription?

There are lots of online stores that purport to sell Phentermine without prescription. Buying and selling this drug without a valid Phentermine prescription from a DEA-registered medical practitioner is illegal and dangerous. Most of these sites that allow you to buy real Phentermine 37.5 mg online are likely to be operating illegally or are selling fake Phentermine.