HCQS 400 mg Tablet (Hydroxychloroquine )

What is HCQS 400 mg (Hydroxychloroquine)?

HCQS 400 mg Tablet is a prescription medication that contains Hydroxychloroquine Sulfate, widely used for the treatment of malaria, rheumatoid arthritis, and systemic lupus erythematosus (SLE). It belongs to the DMARD (Disease-Modifying Anti-Rheumatic Drug) class and works by reducing inflammation, regulating immune system activity, and controlling overactive immune responses in autoimmune conditions, while also helping eliminate malaria-causing parasites.

Manufactured by Ipca Laboratories Ltd., HCQS 400mg (Hydroxychloroquine Tablet) is trusted for its proven effectiveness in managing long-term inflammatory and immune-related disorders. It is commonly prescribed by doctors to improve symptoms, prevent disease progression, and support overall health when used under proper medical supervision.

Use of HCQS 400 mg

For the Treatment of Rheumatoid Arthritis

Rheumatoid arthritis is an autoimmune disease in which the body’s immune system (which usually fights bacteria and viruses) attacks the body’s cells.

The HCQS 400 mg tablet (Hydroxychloroquine) can prevent this from happening and relieve symptoms of this condition such as joint pain, swelling and stiffness.

It also delays joint damage, reduces disability and keeps you active for as long as possible. It may take weeks or months before you notice the effects of the drug.

Treatment of Systemic Lupus Erythematosus (SLE).

Systemic lupus erythematosus (SLE) is a chronic autoimmune condition in which the immune system becomes overactive and starts attacking the body’s own healthy tissues, leading to inflammation and damage in various organs.

It can affect the skin, joints, kidneys, brain, and other organs. HCQS 400 tablets prevent the release of substances in the body that cause inflammation.

Additionally, It can be used to treat many different inflammatory and allergic conditions.

Furthermore, It reduces the immune system’s response to these conditions and reduces symptoms such as swelling, pain, itching and other allergic-type reactions.

Thus, You should always take it as it prescribed for you.

Malaria

Malaria is a disease caused by infected mosquito bites. Symptoms include high fever, chills, discomfort, vomiting, and body aches. 400 mg Hcqs tablets are used to treat or prevent malaria.

It is not effective against all types of malaria and may prove ineffective in regions where the parasite has developed resistance to drugs such as chloroquine.

How Does HCQS 400 mg (Hydroxychloroquine) works?

HCQS 400 mg (hydroxychloroquine sulfate) is a widely prescribed medication used to treat rheumatoid arthritis, systemic lupus erythematosus (SLE), and malaria. It belongs to the class of DMARDs (disease-modifying antirheumatic drugs) and works by modulating the immune system, thereby helping to reduce the inflammation, pain, and long-term tissue damage associated with autoimmune diseases.

In addition to its immunoregulatory effects, HCQS 400 tablet also acts as an antimalarial agent by interfering with the growth of the parasite within red blood cells. This dual-action mechanism makes it a reliable and effective treatment—for both chronic autoimmune conditions and parasitic infections—when used under appropriate medical supervision.

How to Take HCQS 400 mg?

• Take the Hcqs 400mg tablet at the dose and for the duration precisely indicated by your doctor.
• It is generally taken once or twice daily, with a meal, to minimize stomach upset.
• Swallow the tablet with water; do not chew or crush it.
• For best results, take it at the same time each day.
• Do not exceed the recommended dose.

Hydroxychloroquine Side Effects (HCQS 400 mg Tablet)

As with any medication, HCQS 400 mg tablets may cause side effects, although these do not occur in every patient.

Serious Side Effects:

• Allergic reactions
• Retinal toxicity
• Liver or kidney problems
• Heart rhythm abnormalities (arrhythmias)
• Aplastic anemia or agranulocytosis (reduction in the number of red blood cells, white blood cells, or platelets)

Common Side Effects:

• Nausea and vomiting
• Diarrhea
• Dizziness
• Headache
• Loss of appetite
• Skin rash or itching
• Abdominal cramps
• Hair loss or changes in hair color

Hydroxychloroquine Dosage

Depending on the condition being treated, different doses of HCQS 400 mg may be required.

• Rheumatoid Arthritis: At the start of treatment, patients take 400 to 600 mg per day; the dose is subsequently reduced—generally to 200–400 mg—for the continuation of therapy.
• Systemic Lupus Erythematosus: The usual dose is 400 mg, administered once or twice daily, while the maintenance dose is approximately 200–400 mg per day.
• Malaria Prophylaxis: Begin with a weekly dose of 400 mg, starting 14 days prior to returning from the at-risk area, and continue treatment for an additional 8 weeks thereafter.
• Some patients may require a different dosing regimen based on their response to the medication, body weight, and renal function. Physicians and other healthcare professionals determine the appropriate therapeutic regimen for each individual patient.

Missed dose

Avoid skipping the planned dose of Hcqs 400 mg tablets. If you miss your dose, take it as soon as you remember.

However, if it is the next regular dose, do not take the missed dose. Do not double to make up for what you have forgotten.

Overdose

Do not exceed the prescribed dose of Hydroxychloroquine 400mg tablets. Seek medical attention immediately if overdose.

Interaction with Medicine

• Thioridazine
• Aluminium Hydroxide/Magnesium Hydroxide
• Insulin
• Atorvastatin
• Mefloquine
• Neostigmina
• Praziquantel
• Pyridostigmine
• Tamoxifen

Who should not take HCQS 400 mg tablets if:

Inform your doctor if:

• You have previously experienced an allergic reaction or hypersensitivity.
• You suffer from liver disease.
• You suffer from heart disease.
• You suffer from kidney failure.
• You are pregnant, planning a pregnancy, or breastfeeding.

What to avoid while taking Hydroxychloroquine tablets:

• You should avoid consuming alcohol.
• You should avoid driving vehicles.
• You should avoid taking over-the-counter medications.

When not to use HCQS 400 mg (Hydroxychloroquine) tablets:

• You are allergic to this medication.
• You consume alcohol or other substances.
• You suffer from liver or kidney disease.
• You are pregnant or trying to conceive.
• You are breastfeeding.

Safety Warnings for HCQS 400 mg Tablets (Hydroxychloroquine)

Breastfeeding

Women who are breastfeeding should consult a doctor before taking HCQS 400 mg tablets.

Alcohol

Alcohol may interact with HCQS 400mg tablets in various ways, including increasing the risk of side effects, reducing the medication’s effectiveness, or causing other harmful interactions.

Liver

Individuals with pre-existing liver conditions, such as cirrhosis or hepatitis, should consult a doctor before taking tablets.

Lungs

If you suffer from a pre-existing lung condition, such as Chronic Obstructive Pulmonary Disease (COPD) or asthma, it is important to consult your doctor or a specialist before taking this tablets.

Driving

Patients should constantly monitor their reaction to treatment with HCQS 400mg online and exercise caution when driving or operating machinery, should they experience side effects that could impair their ability to perform these activities safely.

Pregnancy

Buy Hydroxychloroquine USA are generally considered safe during pregnancy. However, it is always important to consult a doctor or a specialist before taking any medication while pregnant.

Storage

Store Hcqs 400 tablets at room temperature, in a dry place, and away from light. Ensure that the tablets remain intact and do not sustain damage during storage.

FAQs.

Are HCQS 400mg tablets steroids?

No, it belongs to the class of antimalarial drugs and does not fall into the category of steroids.

Do 400mg HCQS Tablets Suppress Your Immune System?

HCQS has immunomodulatory effects that support its use in the treatment of autoimmune diseases. The relationship between the use of Hydroxychloroquine 400 mg and its effects has not yet been described.

Who should take HCQS 400 mg?

Patients who are allergic to this medication should not take it. Apart from this, patients with liver dysfunction, gastrointestinal dysfunction, neuropathy, retinal disorders, liver or kidney problems should also avoid taking this drug.

Are HCQS 400 tablets safe for long-term use?

Provided there is adequate monitoring and the medication is taken exactly as directed, HCQS 400 tablets can be used safely for extended periods. Patients are required to undergo regular eye examinations, blood tests, and general medical check-ups.

Where can HCQS 400 tablets be purchased in the United States?

HCQS 400 can be ordered online, but only upon presentation of a valid and compliant prescription, from a licensed pharmacy. It is a priority to purchase products from reputable sources and to ensure you consult your doctor regularly.

Can HCQS 400 mg tablets be used in children?

HCQS 400mg tablets can be used in children for the treatment of certain conditions, such as juvenile idiopathic arthritis or lupus. However, the dosage and precautions for use may vary based on the child’s age and weight. It is advisable to consult a healthcare professional specializing in pediatrics to receive appropriate guidance.

How long can HCQS 400mg be taken?

It can be used for extended periods in the treatment of autoimmune diseases, but strictly under the supervision of a physician.

Medical Disclaimer

The content of this page is provided for informational purposes only and should not be considered a substitute for professional medical advice, diagnosis, or treatment. If you have any questions about your health, please consult your doctor or another qualified healthcare professional before self-treating. For any questions or concerns regarding the content of our website, please contact us by email at support@royalpharmacart.com.

Medically Reviewed by:

Dr. Vineet Agraval, (Medical Expert)

Reviewed for accuracy on: March,2026,

Last updated: March 2026

References

• https://medlineplus.gov/druginfo/meds/a601240.html
• https://my.clevelandclinic.org/health/drugs/19772-hydroxychloroquine-tablets
• https://go.drugbank.com/salts/DBSALT000096