Welcome to Phentermine.com!

Want to Buy Phentermine Online?

It is not possible to buy phentermine online or without a prescription.

If you’re interested in a prescription for this medication, make an appointment with your primary care doctor or a local weight loss clinic to discuss weight loss options.

Don't want to spend precious time, effort and money finding a local doctor that prescribes phentermine? Try Phen Caps: an effective, OTC alternative trusted by over 30,000 customers!

1. How It Works

Phentermine signals the adrenal glands to release norepinephrine: a neurotransmitter that triggers a response similar to “fight-or-flight”. This reaction temporarily boosts energy and reduces hunger.

2. Prescriptions

Phentermine has a pharmacology similar to amphetamine, so it is classified as a controlled substance and only available under a doctor’s prescription.

3. Combinations

The two most commonly encountered phentermine combinations are: Phen-Pro, phentermine plus a low dose of an anti-depressant (such as Prozac), and Qsymia, phentermine plus topiramate (an anticonvulsant with weight loss side effects).

4. Withdrawal Symptoms

Most people do not experience phentermine withdrawal. However, the most common symptoms in those that do experience withdrawal are fatigue, weight gain, insomnia, and low mood.

5. Leading OTC Alternative

If you cannot get a prescription for phentermine, or find the Rx medication’s side effects intolerable, Phen Caps is a great solution.

8 mg

Doses per day:

x 1-3

8mg is the lowest dose of phentermine currently available. It can be taken up to three times per day. 

This dose is especially intended for patients that struggle with nighttime snacking, or those who are highly sensitive to the effects of phentermine.

15 mg

Doses per day:

x 1-2

This a lower dose of phentermine that can be taken either once or twice per day. Multiple companies produce 15mg capsules. 

Since the goal is to find the lowest effective dosage, doctors may start patients on 15mg and then increase dosage if needed.

18.75 mg

Doses per day:

x 1-2

People most often find themselves taking 18.5mg when they split a 37.5mg tablet in half.

Some doctors recommend this dosage at the start or end of phentermine treatment. It is also taken as a twice-per-day dosage to spread out the medication.

37.5 mg

Doses per day:

x 1

This is the maximum dose of phentermine. The most popular US brand. Adipex is sold in 37.5mg pills.

This dose is only taken once per day, consider speaking with your doctor about stopping phentermine if this dose is no longer effective.

The most commonly reported side effects of phentermine are:

Dry Mouth





Phentermine is only suitable for those over 18 years old.

It should not be taken by anyone who is pregnant, expecting to become pregnant, or breastfeeding.

You should not take phentermine if you have a history of heart disease, uncontrolled blood pressure, overactive thyroid, glaucoma, a history of pulmonary hypertension, or if you have a history of drug or alcohol abuse.

Like phentermine, Phen Caps help you lose weight by suppressing appetite, stimulating your metabolism and increasing energy. However, unlike phentermine, Phen Caps do not contain phentermine (or any other controlled substance), so they are available online and without a prescription. Plus, since Phen Caps contain only natural ingredients, they do not have any known side effects!

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