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Short description


Soma is the trade name for the drug. The drug Soma compound, also known as Duoflex in Mexico, is an effective means of relieving pain and muscle spasm. The main components of this drug are aspirin (200 mg) and carisoprodol (50 mg). Together, they create a strong analgesic and relaxing effect.

Duoflex tabletas para que sirve?

Duoflex tablets are used to relieve pain and muscle spasms, especially for conditions related to osteochondrosis, injuries or post-surgery. Duoflex medication is recommended as a pain reliever for short-term use.

Duoflex 200 mg: This denotes the aspirin content of the drug. Aspirin is a non-steroidal anti-inflammatory drug that helps reduce inflammation and pain.

Mechanism of Action

Carisoprodol acts on the central nervous system to cause muscle relaxation, while aspirin reduces inflammation and acts as an analgesic.

Soma compound dosage

The dosage of the Soma compound aspirin-carisoprodol depends on the specific medical needs of the patient and should always be determined by the attending physician. It is important to keep in mind that the drug is intended for short-term use, usually no more than 2-3 weeks.

  • Standard Dosage: The usual recommended dosage for adults is one Duoflex tablet three times a day. However, the dosage can be adjusted depending on individual patient characteristics such as age, weight, general health and the presence of comorbidities.

  • Duration of Treatment: The duration of treatment should be as short as possible, given the potential dependence on carisoprodol and the side effects of aspirin.

  • Patients with Renal or Hepatic Insufficiency: In patients with impaired renal or hepatic function, dose adjustment may be necessary, as these conditions may affect the metabolism and excretion of the drug.

  • For Elderly Patients: In elderly patients, dose reduction may be necessary due to a slower metabolism and increased risk of side effects.

How long does the effect of the medicine Duoflex last?

The effect of the drug usually lasts for several hours, but this may vary depending on the individual characteristics of the body.

Side effects

  • Headache

  • Dizziness

  • Drowsiness

  • Nausea

  •  Stomach upset

  • Allergic reactions, including skin rash, itching, swelling of the face or tongue

  • Difficulty breathing

  • Increased risk of bleeding due to aspirin

  • Stomach ulcers or bleeding, especially with long-term use

  • Seizures or loss of consciousness

  • Carisoprodol may be addictive, especially with long-term use or in individuals with a history of alcohol or drug dependence.


  • Allergy to Components: Do not take this if you are allergic to carisoprodol, aspirin, or other NSAIDs (nonsteroidal anti-inflammatory drugs).

  • Gastrointestinal Diseases: Due to the aspirin content, which may irritate the gastric mucosa and increase the risk of ulcers and bleeding.

  • Porphyria: Carisoprodol may cause seizures in people with this condition.

  •  Liver or Kidney Disease: Dosage adjustment or alternative treatments will be required.

  • Pregnancy and Lactation: The drug may adversely affect the fetus and newborn.

  • Age Limitations: Not recommended for children or the elderly due to the increased risk of side effects.

How long does Duoflex stay in the body?

The medicine Duoflex, also known as Soma compound aspirin-carisoprodol in some countries, is a combination of two active ingredients: aspirin and carisoprodol. The half-lives of these components determine how quickly they are metabolized and eliminated from the body, which affects how often the drug is taken and its safety.

Carisoprodol Half-Life

Carisoprodol, the central component of Duoflex, has a relatively short half-life.

  • Duration: The half-life of carisoprodol is approximately 2-3 hours. This means that 2-3 hours after taking the drug, the concentration of carisoprodol in the blood is halved.

  •  Metabolism: Carisoprodol is metabolized in the liver and converted into meprobamate, which also has a medicinal effect and has a longer half-life (about 10 hours).

  • Excretion: Carisoprodol metabolites are eliminated from the body, mainly through the kidneys, with urine.

Aspirin half-life

  • Aspirin, the second component of Duoflex, also has its own half-life:

  • Duration: The half-life of aspirin in the body is approximately 15-20 minutes, but its metabolites may remain active longer.

  • Metabolism and Excretion: Aspirin is rapidly metabolized in the liver and excreted by the kidneys. Depending on the dosage, complete elimination of aspirin metabolites may take 3 to 5 hours.

Interaction of Soma (Duoflex) with other medicines

  • Sedatives and Tranquilizers: Carisoprodol, as a central muscle relaxant, may increase the depressant effect on the CNS caused by sedatives, tranquilizers and alcohol. This may result in increased drowsiness and slower reactions.

  • Opioid Analgesics: Combinations with opioids can significantly increase respiratory depression, which is particularly dangerous and can lead to respiratory depression.

  • Other Nonsteroidal Anti-inflammatory Drugs (NSAIDs): Using Soma compound with other NSAIDs may increase the risk of gastrointestinal ulcers and bleeding.

  • Anticoagulants: The aspirin in the Soma compound may increase the effects of anticoagulants such as warfarin, increasing the risk of bleeding.

  • Hepatotoxic Agents: Since carisoprodol is metabolized in the liver, concomitant administration with other hepatotoxic drugs may increase the burden on the liver and the risk of liver failure.

  • Antidepressants: Especially selective serotonin reuptake inhibitors (SSRIs), may interact with aspirin, increasing the risk of bleeding.

  • Gout medications: Drugs such as methotrexate may interact with aspirin, increasing their side effects.

Soma (Duoflex in Mexico) reviews

Patient reviews of Duoflex are mostly positive, especially in terms of its effectiveness in relieving pain and muscle tension. However, it is important to remember that the perception of the medication may vary from person to person.

The drug Duoflex, which is the Soma equivalent of the Compound aspirin-carisoprodol, is an effective medication for the relief of pain and muscle spasms. Based on the available information, the following conclusions can be drawn about Duoflex:

Duoflex tablets combine the effects of aspirin (an analgesic and anti-inflammatory agent) and carisoprodol (a central muscle relaxant), making them particularly effective in treating muscle pain and spasms associated with a variety of conditions.

The drug is recommended for short-term use and should be used strictly as prescribed by a doctor, taking into account possible side effects and contraindications.

It is important to take into account the individual characteristics of each patient, including susceptibility to the drug, health status and the presence of other medical conditions.

Most patient reviews of Duoflex are positive, especially in terms of its effectiveness in relieving pain and muscle tension.

Overall, Duoflex is a powerful and effective treatment for pain and muscle spasms, but its use requires a careful approach and adherence to dosage.

What shipping methods do you offer?
Currently there is only one shipping method available: regular airmail delivery (10-12 business days) via Mexican postal service, USPS, CANADA POST, and PARCEL FORCE.

Regular airmail is an inexpensive and reliable option.

Tracking information:
Please note that while regular airmail can also be tracked in most cases, the tracking information is available only on delivery (or attempted delivery) of the order. This allows us to see if your order was delivered successfully, but does not provide real-time delivery details.

What are your shipping rates and policies?
At the moment we offer 1 shipping option:

Regular Airmail Delivery (10-12 business days)
Once your order has been shipped, we will send you an email to notify you that your product has left our facilities. From this point on, your product is only 15-24 business days.

Please note that orders are shipped on business days only (Monday through Friday, excluding holidays).

You can view our shipping rate and other information after selecting a particular product.

Do you ship internationally?
In what currency is my purchase transaction received?
The currency used will be the US dollar.

How will my medication be packaged?
Your order will be properly packaged for your protection in transit to destination.

Where are the medications shipped from?
We ship from our office in Acapulco, Gro. Mexico

Where are the drugs you have to sell made?
Most of the drugs we offer are manufactured in Mexico, some are manufactured in countries such as Germany, England, France and others, all manufactured by large multinational laboratories legally established in Mexico.

What is the expiration date of the medications I receive?
We offer the guarantee that your product will have at least 10 months of use at the time of sale, however most of the drugs we sell have an expiration date greater than 1 to 2 years

What is your return policy?
Read the refund and cancellation policy

We are unable to accept credit or debit card payments as VISA and Mastercard policies (do not allow pharmacies established outside the US to sell drugs to US customers).
How do I place an order?
When you click on an ADD TO CART link, you will be directed to our secure server where you will be registered as our customer. After selecting the required product and its quantity, you will be sent an email with the information of your purchase and the information to make the payment.

What happens once I send my order?
If your payment is received and identified, you will immediately receive an order confirmation email and another email once your order has been shipped.

How do I check the status of my order?
After making your purchase, you will receive an email with your order tracking information. This email contains information about the purchase and a link to the official pages of SEPOMEX, USPS, CANADA POST and PARCEL FORCE.

What is your security and privacy policy?
We are committed to protecting your privacy with the highest level of security possible. All your personal information, including name and address, is encrypted so that it cannot be read as it is transmitted from your computer to our server. We use the Secure Socket Layer (SSL) protocol which enables end-to-end data protection.

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