Acxion: The Mexican Brand of Phentermine

Acxion is a brand of prescription-only weight loss pills that are sold in Mexico.

The active ingredient in Acxion is phentermine, which is called Fentermina in Mexico. The phentermine in Acxion boosts the user’s weight loss efforts by suppressing the appetite and increasing energy levels.

Acxion is available to purchase in tablets, capsules, and extended-release tablets. It is manufactured by IFA Celtics, a Mexican pharmaceutical company that aims to meet the diverse needs of doctors and patients. IFA Celtics laboratory is based in Mexico City, Mexico ( 1 ).

What is Acxion used for?

thin woman measuring her waist
Acxion is a popular brand of Mexican phentermine used for weight loss

Acxion pills are prescribed to aid short-term weight management in overweight and obese patients. Doctors use the body mass index (BMI) calculation to assess if a patient is overweight or obese.

To be eligible for Acxion weight loss pills, a patient must have a:

  • BMI ≥ 30 kg/m2, or
  • BMI ≥ 27 kg/m2 with one or more weight-related medical conditions.

Weight-related medical conditions that could make an overweight patient eligible for treatment with Acxion include:

  • Type 2 diabetes mellitus
  • Hypertension (high blood pressure) that is well controlled with medication
  • Hyperlipidemia (high cholesterol levels)
  • Sleep apnea (a disorder in which regular breathing is disrupted when you sleep).
phentermine hydrochloride (chemical structure)
Acxion active ingredient

Your doctor should also review your medical history, other pre-existing medical conditions, and recent medications to determine whether Acxion is an appropriate and safe option for you. Acxion has a long list of contraindications, so it is important that you are honest with your prescribing doctor at your initial appointment.

Acxion is approved for 12 weeks of continuous use or 36 weeks of intermittent use following the pattern of 4 weeks on and 4 weeks off.

The active ingredient in Acxion, phentermine hydrochloride, has been shown to support individuals in losing weight. However, for best results, these weight loss pills should be combined with a healthy diet and doctor-approved physical activity.


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When and How to Take Acxion

Unless your doctor or pharmacist has advised you otherwise, you should take Acxion first thing in the morning. This is because the body absorbs the medication most effectively when it is taken on an empty stomach. You should therefore take Acxion at least 30 to 50 minutes before breakfast, with a full glass of water ( 2 ).

Acxion is available in three strengths, 6.4mg, 15mg, and 30mg. It can therefore be taken in one of the following ways:

  • 6.4mg taken up to three times daily
  • 15mg taken once or twice daily, or
  • 30mg taken once daily in the morning.

The maximum dose of Acxion is 30mg per day.

If you are unsure how to take Acxion, you should ask your doctor or pharmacist for further advice. He or she can help determine the best schedule for you while considering any other medications you take, and your work and sleep patterns.

Understanding the Different Doses of Acxion – 6.4mg, 15mg, and 30mg

Acxion is currently available in three different strengths: 6.4mg, 15mg, and 30mg. It is also available in three different forms:

  • Acxion – tablet
  • Acxion C – capsule
  • Acxion AP – extended-release tablet.

Acxion 6.4mg

Acxion 6.4mg Fentermina box with pill
Acxion 6.4mg tablets

Acxion 6.4mg is only available as a tablet.

This new dosage contains 6.4mg of phentermine hydrochloride. One tablet can be taken up to three times daily. This low dose of Acxion can also be used to slowly increase the dose you take, allowing you to start at 6.4mg and gradually increase to 15mg and up to 30mg if required.

Acxion 6.4mg is comparable to Lomaira, which is only sold in the USA ( 3 ).

Acxion 15mg

Acxion 15mg Fentermina tablets
Acxion 15mg tabletas (tablets)

Acxion 15mg is available as a tablet and capsule.

The guidelines for prescribing phentermine dictate that doctors start their patients on a low dose of the drug, and only increase the amount if weight loss is not achieved and the patient has not experienced side effects.

This reduces the risk of unnecessary side effects and avoidable adverse events.

It is, therefore, common for doctors to start patients on Acxion 15mg once daily. If the desired weight loss is not achieved after 1 to 3 months, the daily dosage can be increased to 30mg.

One 30mg tablet can be taken in the morning, or a 15mg tablet can be taken twice daily. Some people prefer to split the daily dosage to avoid side effects.

Acxion 30mg

Acxion 30mg Fentermina tablets
Acxion 30mg tablets

Acxion 30mg is available as a tablet, capsule, or as an extended-release tablet.

30mg is the most commonly prescribed dose of this medication. Patients can take 30mg of Acxion as a single tablet before breakfast.

If side effects are experienced when taking the maximum dose of 30mg, your doctor may recommend taking a 15mg tablet twice daily.

If your dose is split this way, it is wise to take one 15mg tablet early in the morning and another after midday. Breaking the maximum dose this way is also helpful for those struggling with nighttime cravings or evening binges.

Acxion 30mg AP

Acxion ap - tablets 30mg Extended release (liberación prolongada)
Acxion ap Tablets 30 mg

Acxion AP is an extended-release tablet. It is ideal for patients who only want to take one pill in the morning but also want to benefit from appetite suppression and energy-boosting effects that last all day.

What Are the Side Effects of Acxion?

woman with her forehead pressed into her fist experiencing Acxion side effects
Headache and dry mouth are common Acxion side effect

Acxion is an effective and affordable weight loss medication. However, like all medications, it can cause a range of undesirable side effects and reactions, which range from mild to severe.

Although some people may experience a range of side effects, others will take the medication for months without any adverse effects. You should speak to your doctor if you are concerned about a potential side effect.

Common Side Effects

The phentermine hydrochloride in Acxion is a central nervous system stimulant. This means that Acxion can cause a range of side effects.

The most commonly reported reactions to Acxion include:

These side effects are generally manageable and will settle within 1 to 2 weeks as your body adjusts to the new medication.

Other side effects associated with Acxion include

  • Diarrhea
  • Dizziness (mild to moderate)
  • Heart palpitations (racing heart)
  • Hives or rashes
  • Hyperactivity or restlessness
  • Impotence or a change in sex drive
  • Increased blood pressure
  • Mood changes (for example, worsened anxiety, depression, anger, or irritability)
  • Nausea or vomiting
  • Tremors or shaking
  • An unpleasant taste in the mouth
  • Upset stomach.

You should contact your doctor or seek medical advice immediately if you notice any side effect that persists, worsens, or interferes with your daily life.

Serious Side Effects

Phentermine weight loss pills are associated with severe, potentially fatal heart and lung problems.

If you experience any of the following symptoms while taking Acxion, you must go to the hospital or contact a doctor immediately:

  • Blurred vision
  • Chest pain
  • Decreased ability to exercise
  • Difficulty breathing
  • Fainting
  • Seizure
  • Severe headache
  • Slurred speech
  • Swelling of the legs, ankles, or feet
  • Weakness on one side of the body.

Allergic Reaction

Allergic reactions to phentermine are rare, but you should be aware of the following symptoms of an allergic reaction:

  • Rashes or hives
  • Itching or swelling, primarily affecting the face, tongue, or throat.
  • Severe dizziness
  • Difficulty breathing, feeling wheezy, or having a tight chest

If any of these symptoms occur, you must stop taking Acxion and seek immediate medical attention.


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What Should I Avoid When Taking Acxion?

As with all medications, it is important to know the precautions and interactions associated with Acxion and its active ingredient, phentermine.


Acxion is not suitable for those with:

  • Diabetes
  • Thyroid disease
  • A history of psychosis or a diagnosed psychotic disorder
  • Glaucoma
  • Heart disease, including heart failure or a previous heart attack
  • Heart valve disease
  • Hypertension (high blood pressure) that is not controlled by medication
  • A past medical history of stroke
  • A previous or current drug addiction or dependency disorder
  • An allergy to diet pills or another medication.

Acxion is also unsuitable for those already taking another weight loss or diet pill.

Acxion may not be suitable for those with kidney disease or impairment and should be used cautiously in the elderly.

Acxion must not be taken by pregnant women and is not advisable for nursing mothers. Acxion is not suitable for anyone under the age of 18.


If you take any other medications, you must seek advice from your doctor or pharmacist before you start taking Acxion.

Drug interactions may occur with monoamine oxidase inhibitors (MAOIs), insulin or oral medications taken for diabetes, and adrenergic neuron-blocking drugs. To avoid adverse reactions, you must also abstain from drinking alcohol while taking Acxion.

Where Can I Buy Acxion?

male doctor writing a prescription
Acxion diet pills are widely-available at Mexican pharmacies but remain a prescription-only medication

Most major Mexican pharmacies sell Acxion. However, the distribution and sale of phentermine are carefully controlled. You can only buy Acxion with a valid doctor’s prescription in Mexico.

How Much Does Acxion Cost?

Depending on the dose and preparation, a one-month supply of Acxion costs from $99 MXN to over $400 MXN ($7 to over $19 USD). The price varies between vendors, so you may find it worthwhile to shop around for a lower price.

Some major Mexican pharmacies that sell this medication include:

  • Farmacia San Pablo
  • FarmaTodo
  • Walmart
  • Superama

The following table provides the estimated prices for Acxion (tablets), Acxion C (capsules), and Acxion AP (extended-release tablets).

ProductPrice for 30 Pills​
Acxion 15mg$199 (MXN)-$230 (MXN)
$9.70 (USD)-$11.20 (USD)
Acxion 30mg$310 (MXN)-$400 (MXN)
$15.10 (USD)-$19.50 (USD)
Acxion C 15mg$140 (MXN)-$199 (MXN)
$6.80 (USD)-$9.70 (USD)
Acxion C 30mg$195 (MXN)-$330 (MXN)
$9.50 (USD)-$16.08 (USD)
Acxion AP 30mg$350 (MXN)-$470 (MXN)
$17.10 (USD)-$23.90 (USD)
prices updated 15th March 2022

When calculating costs, remember that a pack of Acxion containing 30 pills will last for one month if you only take one tablet daily. However, if you take two 15mg tablets per day, a 30-pill pack will only last 15 days.

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Acxion Reviews

Based on recent user reviews, Acxion is a popular choice for its effect on weight loss. However, some patients complain about the side effects of the medication. Patients have said the following about Acxion:

Acxion has an average user rating of 4.5/5 stars: (20 votes)

Greta – 6 Kilos

“I take Acxion tabs, chromium, and metformin to lose weight. Since starting, I got sick and took many medications, and it was hard to keep on track, but I lost 6 kilos in 1 month. The headaches are better now, so I’ll keep taking it.”

Caro – No appetite

“I’ve lost 25 kilos with Acxion. I took a daily dose for four months and then rested for a month, and then for the last four months, I’ve been taking it every other day or once every three days.”

Reyna – Super Effective

“I’ve lost 25 kilos with Acxion. I took a daily dose for 4 months and then rested for a month, and then for the last 4 months, I’ve been taking it every other day or once every three days.”

How Does Acxion Compare to Other Weight Loss Pills?

Acxion is well-known and commonly requested but is not the only weight-loss option. Terfamex, another brand of phentermine, and Redotex, a weight loss supplement, are also popular in Mexico.

Acxion vs. Terfamex

Terfamex 15 mg box

Both Acxion and Terfamex are brand names for phentermine weight loss pills.

Although the active ingredient in both medications is Phentermine Hydrochloride, the forms, and dosages differ.

Medication FormsCapsules
Normal and extended-release tablets
Orally disintegrating tablets (ODT)
Available Doses6.4mg
Acxion vs. Terfamex

Learn more here: Terfamex

Acxion vs. Redotex

box of Redotex NF

Acxion and Redotex are both prescription-only weight-loss medications sold in Mexico. Whereas Acxion contains phentermine hydrochloride, Redotex contains a combination of stimulants, including d-norpseudoephedrine, atropine, diazepam, aloin, and tri-iodothyronine.

You must speak to your doctor to assess the risk of taking Redotex. Concerns about the link between Redotex and thyrotoxicosis, a severe thyroid overactivity, have been raised. It is important to be aware that this Mexican weight loss supplement is not approved by the US Food and Drug Administration due to widespread safety concerns ( 8 ).

Acxion vs. PhenQ

PhenQ is a popular weight loss supplement. PhenQ contains natural ingredients that suppress appetite, boost energy levels, and promote weight loss.

Unlike Acxion, this supplement does not contain phentermine. The natural ingredients, therefore, assist individuals in meeting their weight loss goals without the side effects associated with phentermine.

PhenQ is made in the USA and consistently receives positive customer reviews from individuals who have been helped to lose weight naturally.

Learn more here: PhenQ

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How can I buy Acxion in Mexico?

Acxion can be purchased at Mexican pharmacies only with a valid prescription.

Is Acxion the same as phentermine?

Acxion is a branded version of phentermine. Like other phentermine brands, it is available in different strengths and preparations, including an extended-release preparation.

How long does Acxion stay in your system?

The phentermine contained within Acxion will stay in your system for around four days.

What is Acxion used for?

Acxion is a weight loss aid. It can help to suppress the appetite and increase energy levels to help you lose weight more easily. It is suitable for those who are obese or those with a BMI of 27 or over who also have medical complications associated with their weight.

How are Acxion pills taken?

Acxion pills should be swallowed whole with some water. The maximum daily dosage is 30mg, which may be broken down into smaller doses throughout the day to reduce the risk of side effects or offer longer-lasting appetite suppression. You should take Acxion as prescribed by your doctor.

How much weight can you lose with Acxion?

In a study of participants taking phentermine (the active ingredient in Acxion) for 12 weeks, an average weight loss of 3.8kg was noted. At least 45% of participants lost more than 5% of their baseline body weight. Phentermine has therefore been deemed a significantly effective treatment for weight loss.

Is Acxion FDA approved?

No, Acxion is not approved by the US Food and Drug Administration (FDA).

What is the difference between Acxion and Acxion AP?

Acxion is a standard-release pill, whereas Acxion AP is an extended-release tablet. Acxion AP is often favored by those who only want to take one pill per day, or want longer-lasting appetite suppression. Extended-release tablets can be beneficial for those who experience late-night cravings.

Are Acxion pills dangerous?

In rare cases, Acxion pills have caused fatal heart and lung diseases. This is why speaking to your doctor to check that Acxion is the right choice for you is crucial. Your doctor can also monitor your health while you take the pills, to check for no adverse health events or side effects.

Does Acxion show up on a drug test?

Acxion contains phentermine, which shares some similarities with amphetamine. For this reason, taking Acxion may show up as a positive reading for amphetamine on a drug test. Suppose you have been prescribed Acxion or another phentermine-containing medication. In that case, a positive result should be declared negative, but for transparency, it is advisable to state that you take Acxion or phentermine before taking the test.

How does Acxion Work?

Acxion contains Phentermine Hydrochloride. Phentermine has similarities with amphetamine and therefore suppresses the appetite and boosts energy levels. In combination with a healthy diet and exercise, taking Acxion can aid weight loss.

Is Acxion legal in the USA?

Acxion is widely prescribed in Mexico but not legal in the USA. Various online platforms and pharmacies may sell Acxion to those outside Mexico. Still, due to the potential adverse events, you should not take it without consulting your doctor first. In the US, other forms of phentermine can be obtained legally with a prescription.

Is Acxion a controlled substance?

Yes. The phentermine contained within Acxion is a Schedule IV controlled substance.

Can you drink when taking Acxion?

You should not drink alcohol when taking Acxion. Combining alcohol and Acxion may increase your risk of side effects and adverse drug reactions. Alcohol is also a source of empty calories, so abstaining from alcohol will likely aid your weight loss journey.

Can you take Acxion with birth control?

Yes, you can take birth control when taking Acxion. Pregnant women should not take Acxion, so it is essential that you take steps to prevent pregnancy when taking this weight loss aid. You should speak to your doctor to check that the form of birth control you use is suitable for use with Acxion.

Do you take Acxion around the same time every day?

Yes, you should take Acxion at the same time every day. Morning doses of Acxion should be taken on an empty stomach 30 to 50 minutes before breakfast. If you take a second dose, this should be taken in the early afternoon to aid appetite suppression later in the day.


Acxion is manufactured by IFA Celtics, a Mexican pharmaceutical company dedicated to producing high-quality products that improve quality of life by meeting the diverse needs of doctors and patients ( 1 ).

Below is the contact information for IFA Celtics laboratory in Mexico City, Mexico:

Av. Insurgentes Sur No. 2453
Piso 9, Oficina 902
Colonia Tizapán, Del. Alvaro Obregón
01090 México, Distrito Federal

1-800-719-9604 / 1-800-719-9605

  1. (2023) IFA Celtics.
  2. IFA Acxion (2023) P.R. Vademecum.
  3. (2023) Lomaira.
  4. Members of “Losing Weight with Phentermine” Support Group on Facebook & Forum. (2019, March 13). [User Report of Common Phentermine Side Effects]. Unpublished raw data.
  5. Han Tony Gao et al. Two Cases of Thyrotoxicosis due to Redotex Ingestion, a Mexican Weight Loss Drug. Journal of Emergency Medicine. 2021; 60(4): 495-497.
  6. (Elimination from Body).
  7. Hyun Ok Kim et al. Postmarketing Surveillance Study of the Efficacy and Safety of Phentermine in Patients with Obesity. Korean Journal of Family Medicine. 2013; 34(5): 298-306.
  8. (2018) Phentermine Approval.