Terfamex is a Mexican brand of phentermine weight loss pills. Available in both capsule and orally disintegrating tablet (ODT) form, this medication helps suppress appetite and boost energy so that patients can lose weight more quickly and easily. It is only sold under a doctor’s prescription and should not be used for more than 12 weeks at a time.
Terfamex is available in Mexico, Venezuela, Peru, Colombia, Panama and Argentina.
What is Terfamex?
Terfamex is a Mexican brand of phentermine weight loss pills that are sold in Latin America. It’s a branded preparation of the popular prescription appetite suppressant, phentermine hydrochloride (phentermine HCL).
This medication helps overweight patients eat less and move more to lose weight faster by suppressing appetite and giving users an extra boost of energy.
Given its strength and addictive potential, the compound is classified as a class IV controlled substance. As a result, Terfamex (phentermine) is a short-term medication and only available under a doctor’s prescription.
Who Can Take Terfamex?
This medication is an option for people with a body mass index (BMI) greater than 30, who are considered medically obese. It is also available for overweight patients with a BMI greater than 27 if the individual also struggles with a weight-related condition like type 2 diabetes or high blood pressure.
However, a patient’s level of obesity is not the only factor to consider. It is also important to asses why a patient is overweight, as well as their current health status, other medications and medical history.
Terfamex (phentermine) should not be used in the presence of some medical conditions or in combination with some medications (1).
Learn more here: Phentermine Contraindications
Terfamex is currently available in two different presentations and three different doses. At your prescribing appointment, your doctor will work with you to determine which dose and presentation is correct for you.
Fifteen milligrams is the lowest dose of this medication. It is the only dose that is sold in both capsule and ODT form.
Terfamex 15 mg pills can be taken one or two times per day, depending on doctor’s orders.
People who struggle with nighttime cravings or binging sometimes prefer to take two smaller doses of phentermine throughout the day so that the medication’s effects last longer. However, if you struggle with insomnia this may not be the best option.
Terfamex 30 mg
Terfamex 30 mg is the highest dose of Terfamex available in capsule form. It should only be taken once a day.
Most patients take this pill before breakfast (first thing in the morning) with a full glass of water.
Terfamex 37.5 mg
In Latin America, 37.5 mg is the maximum daily dose of phentermine. Terfamex offers this dose as an ODT.
Terfamex OD should only be taken once a day, preferably in the early morning.
However, since it dissolves on your tongue, Terfamex 37.5 can be taken with or without water. ODTs are a good option for people that have trouble swallowing pills, but they tend to cost more than traditional capsules or tablets (2,3).
How To Take Terfamex
Since this is a prescription medicine, your doctor and pharmacist will give you clear directions about how to take Terfamex. Follow these instructions.
Always take this medication EXACTLY as prescribed.
Given the medication’s addictive potential, as well as its progressive loss of efficacy, Terfamex should only be taken for 12 weeks at a time. The United States FDA only approved phentermine for this short course of treatment and research has not assessed the safety of taking the medication for longer periods of time (1).
If you and your doctor feel that you need more than three months of treatment to reach a healthy weight, your prescribing physician may choose to prescribe you multiple rounds of phentermine punctuated by regular breaks.
When to Take Terfamex
Your doctor will talk to you about specific dosing instructions to accommodate your individual schedule, but phentermine is usually taken:
- First thing in the morning (before breakfast), or
- 1-2 hours after breakfast.
Given the simulant properties of phentermine HCL, do not take Terfamex within 8 hours of bedtime. This should be easy if you are only taking one pill per day, but if you take 15 mg twice per day, take your second dose relatively early in the afternoon so that you can to sleep at night.
Terfamex Side Effects
Phentermine is a phenomenally effective weight loss medication, but it can also cause some serious side effects. While most patients experience only mild reactions – such as dry mouth, headache or insomnia – others are forced to deal with more severe effects.
Severe Side Effects
A severe reaction to Terfamex may be evidenced by one or more of the following symptoms:
- Chest pain
- Trouble breathing
- Swelling of feet or lower legs
- Difficulty in carrying-out day to day activities
Go to the hospital or seek immediate medical attention if you experience any of the above symptoms while taking Terfamex (phentermine).
Common Side Effects
While it is important to remain aware of serious potential side effects, most patients only experience mild reactions to this medication. Common side effects of phentermine include:
- Dry mouth (xerostomia)
- Trouble sleeping (insomnia)
- Rapid heart rate
- Mood changes (e.g. “phen rage”)
- Changes in sex drive
Read more here: Phentermine Side Effects
While taking Terfamex, or before pursuing a prescription for this weight loss medication, consider the following factors:
Terfamex and Alcohol
Phentermine is an “upper” while alcohol is a “downer”. The combination of these two substances increases patients’ risk of cardiovascular and other side effects, like dizziness, racing heart and high blood pressure.
Since both phentermine and alcohol affect each person differently, it’s risky and potentially dangerous to combine the two substances. Do NOT drink alcohol while taking Terfamex (4).
Terfamex and Pregnancy
You should not take Terfamex if you are pregnant or trying to conceive. In the US, phentermine is classified as pregnancy category X.
Given these recommendations, many female patients ask specifically about Terfamex and birth control.
While many people use birth control successfully alongside phentermine, some sources indicate that taking a birth control pill with phentermine can increase the risk of thrombosis. As a result, it’s important totalk to your prescribing doctor, pharmacist and gynecologist about Terfamex and birth controlbefore starting treatment.
Terfamex and Other Medications
It is especially important to tell your prescribing doctor if you take, or have recently taken any:
- Antidepressant medications, including monoamine oxidase inhibitors (MAOIs) or selective serotonin reuptake inhibitors (SSRIs)
- Blood pressure medications,such as guanadrel o guanethidine (3)
However, these are not the only pills that interact with phentermine. For this reason, it’s important to tell your doctor and pharmacist about all recent medications (prescription and OTC) and supplements before starting phentermine.
Read more here: Medications and Other Phentermine Contraindications
Where to Buy Terfamex
If you are interested in taking phentermine for weight loss, speak to your doctor about a prescription. He or she will evaluate the appropriateness of this medication in your specific case and then assess whether this medication is right for you.
After obtaining a valid prescription, you can buy Terfamex at most major pharmacies in:
Read more here: How to Get a Prescription for Phentermine
Terfamex Without a Prescription
This medication is NOT available without a prescription.
The main ingredient (phentermine HCL) is a controlled substance, so distribution and sale of these prescription weight loss pills is tightly controlled. It is illegal and dangerous to purchase this medication without a prescription.
Price of Terfamex
Terfamex costs about 180-460 Mexican pesos (or 9-25 US dollars) for 30 pills, which typically equates to a one-month supply of medication.
The table below shows the average price of Terfamex at major Mexican pharmacies:
|Capsules||Average Cost of 30 Pills|
|15 mg||$179 (MXN)-$260 (MXN) |
$9 (USD)-$14 (USD)
|30 mg||$298 MXN (MXN)-$425 (MXN) |
$15 (USD)-$22 (USD)
|ODT||Average Cost of 30 Pills|
|15 mg||$327 (MXN)-$367 (MXN) |
$17 (USD)-$19 (USD)
|37.5 mg||$399 MXN (MXN)-$464 (MXN) |
$21 (USD)-$25 (USD)
NOTE: These prices are only estimates and do not represent any type of guarantee or coupon. Last updated July 2018 [6,7,8,9].
Terfamex vs. Other Weight Loss Pills
Interested in prescription weight loss medications, but not sure if Terfamex is right for you? Here’s a comparison of this brand of phentermine to other medications and supplements on the market.
Terfamex vs. Acxion
Terfamex and Acxion are two brands of phentermine weight loss pills available in Mexico.
Both pills contain the same active ingredient and come in a variety of doses, but the presentations are different. Both brands have capsules, but Terfamex also comes in an ODT while Acxion offers extended-release tablets.
The two brands cost about the same.
Terfamex vs. Orlistat
Terfamex and Orlistat are both prescription weight loss medications, but they contain different active ingredients. While Terfamex contains phentermine HCL as its active ingredient, orlistat is the generic name (and active ingredient) of weight loss medications like Xenical and Alli.
Unlike phentermine which acts as a stimulant, orlistat decreases fat absorption to help patients lose weight (10). It does not affect appetite or energy, so eating proper portions and staying active is left up to you and your willpower while taking orlistat.
Orlistat is legal in most countries, including many that have banned phentermine. It is sold under various brand names, including: Andanza, Lindeza, Redustat, Orlistat MK, Xenical and Alli.
Terfamex vs. Redotex
Redotex is often called the “Mexican Miracle Diet Drug”, but actual reviews of the prescription-only weight loss medication are very mixed. In fact, Redotex is banned in the USA due to safety concerns.
Unlike Terfamex which contains phentermine HCL as its active ingredient, Redotex relies on a cocktail of potentially-dangerous stimulant ingredients, including: norpseudoephedrine, atropine sulfate, diazepam, aloin, and triiodothyronine.
Does Terfamex actually help them lose weight? Are the side effects worth it? Recent reviewers indicate that the pills work well, but often cause a myriad of uncomfortable side effects.
Terfamex has an average user rating of 4.3/5:
Here are some recent Terfamex reviews:
Isabella – Positive Results
Today is my last day taking Terfamex 30mg. I’ve seen a lot of positive results in my body and my health and I’m happy that I haven’t had side effects like other people I’ve read about. I took Redotex NF before and even though I lost weight the side effects were too much.
Maribell – Deception
I tried this medicine because my girlfriends insisted that it was the best thing to lose weight, but it’s not… The side effects are too much. The constipation was the worst and the headaches were unbearable and it made my mouth taste bad too. I lost 21 pounds, but that’s not enough given how miserable I felt.
Nathy – Incredible!
I think this pill is better than the original USA one. I’ve lost 32 pounds so far and still going strong.
Who Makes Terfamex?
Terfamex was developed by KVK-TECH, but it is currently manufactured and distributed by Medix S.A. The two companies reached this agreement in 2017, in an effort to expand KVK-TECH’s business into Central America.
Productos Medix S.A. de C.V.
Calzada del Hueso No. 39, Ex Ejido de Santa Ursula Coapa, Deleg. Coyoacán, 04650, México, D.F.
IPPA Code: KEAR-06330022080212/RM2008
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