Aralen (Chloroquine) – A Comprehensive Guide to Uses, Dosage, Side Effects, and Precautions


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Active ingredient: Chloroquine

Dosage: 250mg, 500mg

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Short general description of Aralen (chloroquine)

Chloroquine, commonly known as Aralen, is an antimalarial medication that has been widely used for decades. Being a member of the quinoline family, it exhibits potent antimalarial properties by targeting the parasites responsible for causing malaria.

Mechanism of Action:

Chloroquine works by preventing the growth and survival of the parasites within the body. It does this by interfering with their ability to break down and utilize hemoglobin, an essential protein found in red blood cells. By disrupting this process, chloroquine effectively inhibits the parasites’ ability to reproduce and spread.

Medical Uses:

Aside from its primary use in treating malaria, chloroquine has shown promise in various other medical conditions. According to CDC, it has been used in the treatment of rheumatoid arthritis, lupus erythematosus, and certain types of amebiasis.

For individuals suffering from these conditions, chloroquine can help reduce inflammation, suppress an overactive immune response, and alleviate symptoms associated with these diseases. Additionally, it is sometimes prescribed off-label to manage certain viral infections, such as Zika and COVID-19.


Chloroquine is available in tablet form for oral administration. The dosage usually depends on the specific condition being treated and the patient’s age and weight. It is crucial to follow the prescribed dosage and complete the entire course of treatment to ensure its effectiveness.

Potential Side Effects:

While chloroquine is generally well-tolerated, it may cause some side effects in certain individuals. These may include nausea, headache, stomach cramps, and visual disturbances. Severe adverse reactions are rare but can occur in individuals with a pre-existing sensitivity to chloroquine.


Before taking chloroquine, it is essential to consult with a healthcare professional, especially if you have a history of certain medical conditions, such as heart or liver problems. Additionally, inform your doctor about any medications you are currently taking to prevent potential interactions.


In summation, chloroquine (Aralen) is an effective antimalarial medication with potential benefits in the management of other medical conditions. By understanding its mechanism of action, appropriate administration, and potential side effects, individuals can utilize this drug safely and effectively under medical supervision.

2. Uses and benefits of Aralen (chloroquine)

Treatment of malaria

Aralen, also known as chloroquine, is primarily used for the treatment and prevention of malaria. Malaria is a mosquito-borne disease caused by a parasite that infects red blood cells. It is most commonly found in tropical and subtropical regions.

Chloroquine works by interfering with the growth and reproduction of the parasite in red blood cells, effectively preventing and treating the infection. It is especially effective against malaria caused by Plasmodium vivax and Plasmodium malariae parasites.

Rheumatoid arthritis and lupus

In addition to its anti-malarial properties, Aralen is also used for the treatment of rheumatoid arthritis and lupus erythematosus. Rheumatoid arthritis is an autoimmune disease that causes chronic inflammation and affects the joints, while lupus erythematosus is an autoimmune disorder that can affect various parts of the body, including the skin, joints, kidneys, heart, and lungs.

Chloroquine helps alleviate the symptoms of these conditions by reducing inflammation and suppressing the abnormal immune response. It can help relieve joint pain, swelling, and stiffness in rheumatoid arthritis, as well as skin rashes, fatigue, and systemic symptoms in lupus erythematosus.

COVID-19 potential treatment

Recently, Aralen has gained significant attention in the context of the COVID-19 pandemic. While it is not yet approved for this specific use, preliminary studies and anecdotal evidence suggest that chloroquine, including Aralen, may have potential as a treatment for COVID-19.

According to some studies, chloroquine has shown an inhibitory effect on the replication of the SARS-CoV-2 virus in vitro. In addition, it is believed to modulate the immune response and reduce the severity of lung inflammation associated with COVID-19. However, further research and clinical trials are needed to determine its safety and efficacy in treating COVID-19.

Potential side effects

While Aralen can be beneficial in treating various conditions, it is important to be aware of potential side effects. Common side effects of chloroquine include nausea, vomiting, abdominal pain, headaches, and blurred vision. In rare cases, it can cause more serious side effects such as cardiovascular issues, seizures, and psychiatric symptoms.

It is crucial to take Aralen under the supervision of a healthcare professional and follow the prescribed dosage. They will monitor for any adverse reactions and provide guidance on its use based on individual circumstances and medical history.


Aralen (chloroquine) is a versatile medication that serves various purposes. It is primarily used for the treatment and prevention of malaria, as it effectively targets the parasite responsible for the infection. Additionally, it is used in the management of rheumatoid arthritis and lupus erythematosus, providing relief from symptoms by reducing inflammation and modulating the immune system.

Furthermore, Aralen has shown potential as a treatment for COVID-19, although further research is needed to confirm its efficacy. Like any medication, Aralen does come with potential side effects, and it is important to use it under medical supervision.

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$0,6 per pill


Active ingredient: Chloroquine

Dosage: 250mg, 500mg

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3. Uses of Aralen (Chloroquine)

Aralen, also known by its generic name chloroquine, is a medication that is primarily used to treat and prevent malaria, a serious and potentially life-threatening mosquito-borne disease. It belongs to a class of drugs called antimalarials and has been used for decades to combat this infectious disease.

Treating Malaria

One of the main uses of Aralen is in the treatment of malaria. Malaria is caused by a parasite known as Plasmodium, which is transmitted to humans through the bite of infected mosquitoes. The disease affects millions of people worldwide, especially in regions with tropical and subtropical climates.

Chloroquine is highly effective in treating malaria caused by Plasmodium vivax, Plasmodium ovale, and Plasmodium malariae. It works by interfering with the growth and reproduction of the parasites within the red blood cells, ultimately killing them and stopping the progression of the disease.

It is important to note that Aralen may not be effective against certain strains of malaria, especially those that have developed resistance to the medication. Therefore, it is crucial to consult healthcare professionals or refer to reliable sources, such as the Centers for Disease Control and Prevention (CDC), for up-to-date information on the recommended treatment options and guidelines for specific regions or countries.

Preventing Malaria

In addition to treating malaria, Aralen is also utilized for preventive purposes. Individuals traveling to malaria-endemic areas are often prescribed this medication to reduce their risk of contracting the disease.

The prophylactic use of Aralen involves taking the medication before, during, and after the visit to the affected regions. It helps in preventing the parasites from establishing an infection within the body, providing a crucial preventative measure for travelers.

It is important to remember that Aralen is not a 100% guarantee against malaria, and it should be used in combination with other preventive measures such as mosquito netting, insect repellents, and protective clothing. The appropriate dosage and duration of prophylaxis should be determined by healthcare professionals based on factors like the individual’s medical history, destination, and the specific strains of malaria prevalent in the area.

Potential Unapproved Uses

While Aralen is primarily prescribed for malaria treatment and prevention, it may have potential benefits in certain unapproved uses. Studies have suggested that it could be effective in treating rheumatoid arthritis, lupus erythematosus, and other autoimmune disorders. However, more research is required to establish its safety and effectiveness in these conditions.

It is important to understand that the use of any medication for unapproved purposes should only be considered under the guidance and supervision of healthcare professionals. Off-label use of Aralen can present risks and potential side effects, and decisions regarding its usage should be made after careful evaluation of individual circumstances and consultation with medical experts.

Overall, Aralen (chloroquine) is a valuable medication for the treatment and prevention of malaria. Its long history of use and established efficacy make it an essential tool in the fight against this deadly disease. However, it is crucial to stay informed about the latest recommendations and guidelines related to its use to ensure optimal outcomes and minimize the development of drug resistance. Always consult healthcare professionals or reputable sources for accurate and up-to-date information on its uses, dosage, and potential side effects.

The Use of Aralen (Chloroquine) in Malaria Treatment

Malaria, a life-threatening disease caused by parasites transmitted through the bite of infected mosquitoes, remains a significant global health concern. While preventive measures such as insecticide-treated bed nets and indoor residual spraying are crucial in controlling the spread of malaria, effective treatment options are equally vital. Aralen, also known as chloroquine, has been a widely used antimalarial medication for decades.

1. History and Development

Aralen was developed in the 1930s and became commonly used for malaria treatment in the mid-20th century. Originally derived from quinine, a natural compound found in the bark of the South American cinchona tree, chloroquine proved to be more effective and less toxic, revolutionizing malaria therapy.

2. Mechanism of Action

Chloroquine exerts its antimalarial effects by accumulating in the acidic environment within the parasite’s digestive vacuole, preventing the breakdown of hemoglobin. This accumulation ultimately leads to the parasite’s death and the cessation of malaria symptoms. The precise mechanism of action is still not fully understood, but several hypotheses suggest interference with the parasite’s DNA replication and inhibition of critical enzymes involved in metabolic processes.

3. Efficacy and Resistance

For decades, Aralen has been a cornerstone in malaria treatment due to its high efficacy against various Plasmodium species, the parasites responsible for causing the disease. However, the emergence of drug-resistant malaria strains, particularly Plasmodium falciparum, poses a significant challenge. Drug resistance occurs when parasites develop genetic mutations that render them less susceptible to the effects of chloroquine. The World Health Organization (WHO) regularly updates treatment guidelines to address this challenge and ensure effective patient care.

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4. Current Role and Availability

Despite the emergence of resistance, Aralen continues to play a role in malaria treatment, especially in regions where drug-resistant strains are less prevalent. It remains affordable and widely available, making it a viable option in resource-constrained settings where alternative antimalarial drugs may not be easily accessible.

In recent years, Aralen has also gained attention for its potential use in treating other diseases. Research has shown its efficacy against certain viral infections, including the Zika and Ebola viruses. However, further studies are needed to determine the optimal dosages and safety profiles for these applications.

Due to its long-standing use, the safety of Aralen is well-established, with known side effects being generally mild and transient. However, individuals with pre-existing conditions such as liver disease or certain genetic conditions should exercise caution and consult their healthcare providers before using this medication.

5. Conclusion

Malaria continues to pose a significant public health burden, particularly in tropical and subtropical regions. While Aralen (chloroquine) has faced challenges with drug resistance, it remains an important tool in the fight against this deadly disease. Ongoing research and development of new antimalarials are necessary to combat the emerging resistance and ensure effective treatment for all individuals affected by malaria.

For more information about malaria, its prevention, and treatment, please visit the World Health Organization’s website on malaria.

The Efficacy and Side Effects of Aralen (Chloroquine)
Aralen, also known by its generic name chloroquine, is a medication primarily used for the prevention and treatment of malaria. It belongs to a class of drugs called antimalarials, which work by killing the malaria parasites or inhibiting their growth in the human body. This article will discuss the efficacy of Aralen in treating malaria and its potential side effects.
1. Efficacy of Aralen in Treating Malaria:
Aralen has been widely used for the treatment of malaria, particularly in areas where the disease is prevalent. Studies have shown that Aralen effectively kills the malaria parasites, thereby reducing the symptoms and duration of the infection. Additionally, Aralen has also been used as a prophylactic measure to prevent malaria in individuals traveling to endemic regions.
2. Mechanism of Action:
Aralen’s mechanism of action involves inhibiting the growth and replication of the malaria parasites in the human body. It does this by interfering with the parasite’s ability to break down and utilize the heme molecule, which is essential for its survival. Without the proper utilization of heme, the parasites are unable to survive and grow, leading to their death.
3. Dosage and Administration:
The dosage of Aralen may vary depending on the severity of the malaria infection and the patient’s age and weight. Typically, it is administered as a tablet, with the recommended dosage for adults being 500 mg once a week. However, the dosage may need to be adjusted in certain cases, such as in children or individuals with liver or kidney problems. It is important to follow the prescribed dosage and complete the full course of treatment to ensure effectiveness.
4. Potential Side Effects:
While Aralen is generally well-tolerated, it can cause some side effects in certain individuals. Common side effects include nausea, abdominal pain, headache, and dizziness. These side effects are usually mild and subside on their own. However, in rare cases, Aralen can cause more serious side effects such as retinopathy (damage to the retina of the eye), muscle weakness, and cardiac rhythm disturbances. It is crucial to report any unusual or severe side effects to a healthcare professional immediately.
5. Drug Interactions:
Aralen may interact with other medications, leading to potentially harmful effects. For example, concurrent use of Aralen with certain antibiotics, antacids, or cardiac medications can interfere with its absorption or increase the risk of side effects. It is essential to inform your healthcare provider about all the medications you are currently taking to avoid any drug interactions.
In conclusion, Aralen (chloroquine) is an effective antimalarial medication that has been widely used for the treatment and prevention of malaria. It works by inhibiting the growth of malaria parasites in the body. While generally well-tolerated, Aralen can have potential side effects, and it may interact with other medications. Therefore, it is crucial to follow the prescribed dosage, report any adverse effects, and inform your healthcare provider about all the medications you are taking. With proper use and monitoring, Aralen can significantly contribute to the management of malaria infections worldwide.


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Active ingredient: Chloroquine

Dosage: 250mg, 500mg

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6. Possible side effects of Aralen (chloroquine)

While Aralen (chloroquine) can be an effective medication for treating certain conditions, it is important to be aware of the potential side effects that may occur. Most side effects are usually mild and reversible, but some may require medical attention.

Common side effects

  • Headache: Some patients may experience mild to moderate headaches while taking Aralen. If the headache becomes severe or persistent, it is recommended to consult a healthcare professional.
  • Nausea and vomiting: These gastrointestinal symptoms are common side effects of chloroquine. If the symptoms persist or worsen, it is advised to seek medical help.
  • Diarrhea: Aralen can sometimes lead to loose or watery stools. In most cases, this side effect resolves on its own. However, if diarrhea becomes severe or prolonged, medical advice should be sought.
  • Skin rash: Some individuals may develop a skin rash while using Aralen. If the rash is accompanied by other symptoms such as itching or swelling, it is important to consult a healthcare professional.
  • Visual disturbances: Chloroquine has been known to cause changes in vision. If you notice any blurring, halos around lights, or any other visual disturbances, it is essential to inform your doctor immediately.
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Less common side effects

While less common, the following side effects may occur:

  • Loss of appetite
  • Dizziness or lightheadedness
  • Muscle weakness
  • Hair loss or changes in hair color
  • Abnormal heart rhythm
  • Low blood cell counts

If you experience any of these less common side effects, it is recommended to consult a healthcare professional for further evaluation.

Serious side effects (rare)

Although rare, Aralen can potentially cause serious side effects. Seek immediate medical attention if you experience any of the following:

  • Allergic reactions: Symptoms may include severe skin rashes, itching, swelling, difficulty breathing, or dizziness.
  • Mental or mood changes: Aralen can occasionally affect mental function and mood. If you notice any unusual changes in behavior, mood swings, or suicidal thoughts, it is important to seek medical help right away.
  • Severe stomach or abdominal pain: This may be a sign of a serious gastrointestinal condition, and medical assistance should be sought promptly.
  • Muscle weakness or stiffness
  • Hearing changes: If you experience any hearing loss or ringing in the ears, inform your healthcare provider immediately.
  • Signs of liver problems: Symptoms can include dark urine, yellowing of the skin or eyes (jaundice), persistent nausea or vomiting, or abdominal pain.
  • Signs of low blood sugar: This may include dizziness, excessive sweating, and difficulty concentrating.

It is important to note that this is not an exhaustive list of side effects. If you experience any unusual symptoms or concerns while taking Aralen, it is always best to consult with your healthcare provider for personalized advice.

The Potential Side Effects of Aralen (Chloroquine)

While Aralen (chloroquine) has been widely used as an antimalarial drug for decades, it is essential to understand the potential side effects that may arise from its usage. Although not everyone experiences these side effects, it is crucial to be aware of them and to consult a healthcare professional if any concerns arise.

1. Nausea, Vomiting, and Diarrhea

One of the most common side effects associated with Aralen is gastrointestinal discomfort, including nausea, vomiting, and diarrhea. These symptoms can be mild to moderate in nature and usually resolve on their own within a few days. However, if these symptoms persist or become severe, it is important to seek medical attention.

2. Vision Changes

Aralen can also affect the eyes, resulting in potential vision changes. This might include blurred vision, difficulty focusing, or even color vision problems. If any significant changes in vision occur while using Aralen, it is crucial to inform a healthcare provider promptly.

3. Skin Reactions

Some individuals may experience skin reactions while taking Aralen. These can range from mild rashes to more severe conditions like Stevens-Johnson syndrome or toxic epidermal necrolysis. If any skin abnormalities or allergic reactions develop, it is vital to discontinue the medication and seek immediate medical attention.

4. Mood and Behavior Changes

In rare cases, Aralen usage has been associated with mood swings and behavioral changes. This might include symptoms such as anxiety, depression, agitation, or even hallucinations. It is essential to monitor and report any significant shifts in mood or behavior to a healthcare professional.

5. Muscle Weakness and Tremors

Although infrequent, some individuals may experience muscle weakness or tremors while taking Aralen. These symptoms are generally temporary and resolve once the medication is discontinued. If muscle weakness or tremors become severe or persistent, consultation with a healthcare provider is recommended.

6. Blood Disorders

In rare cases, Aralen can lead to blood disorders, including changes in blood cell counts. This might manifest as unusual bleeding, bruising, or a prolonged decrease in the number of specific blood cells. Prompt medical attention is necessary if any symptoms of blood disorders occur.

7. Potential Cardiac Effects

There have been reports, albeit rare, of Aralen causing certain cardiac effects. These may include heart rhythm disturbances, such as prolonged QT interval, which can lead to serious complications. Individuals with pre-existing heart conditions should exercise caution and inform their healthcare provider before starting Aralen therapy.

It is important to note that this is not an exhaustive list of all possible side effects associated with Aralen. Therefore, seeking professional medical advice and reading the medication leaflet are essential steps to ensure optimal use and minimize the risk of adverse reactions.

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Tags: Aralen, Chloroquine


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