Quinine is an oral medication used to treat malaria. It is in a class of medications called antimalarials. It works by killing the parasites that cause malaria. This medicine may also be used to treat other conditions as determined by your doctor.

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What does Quinine treat?

Quinine treats Malaria which is caused by a parasite that enters the red blood cells. It works by killing it and preventing growth of these parasites. Quinine is classified under the list of anti-malarials and is a highly effective drug.

what are the side effects of Quinine?

Quinine might have some side effects but it’s not possible to anticipate them. It does not have any major side effects and the minor ones that may occur are temporary. In rare cases, there might be major side effects and immediate medical attention must be sought.

Some of the side effects could be headache, unusual sweating, blurred vision, ringing in the ears, dizziness, nervousness, diarrhea, sweating, low blood sugar and stomach pain. Besides these, there could be other side effects too.

In case, there is a change in intensity of side effects or if any new side effects develop, make sure you consult your doctor.

Dosage Instructions

Follow the Quinine dosage prescribed by your physician. The dosage could vary based on individual patient requirements. Always follow your physician’s instructions or go by the directions on the prescription drug label. It’s to be taken along with food.


Missed a dose?

Take it immediately once you remember. In case, this time is closer to the next dosage, skip it and get back to the prescribed schedule. Never take a double dose unless your doctor specifically asks you to.


Don’t waste any time and seek immediate medical attention.

Drug Interactions

Drug interactions must be considered before starting to take any kind of drug. Drug interactions might happen either when Quinine is taken along with another drug or with particular foods. To prevent any kind of negative interaction, make sure you inform your doctor of any drugs you are taking including non-prescription medication, OTCs, health supplements like vitamins, minerals, herbal medicine and so on which may interfere with the effect of Quinine.

It may interact with:


  • Digoxin
  • Metoprolol
  • Ranitidine
  • Rifampin


It may also interact with blood thinners and antibiotics. This is not an exhaustive list though.

Appraise your doctor of any medical conditions that you are suffering from and your family history of medical ailments. It’s important that you do not stop or start taking any medicine without the consent of your physician.

What to ask your doctor before you start on Quinine?

  • Can I take Quinine along with other drugs?
  •  Are there certain foods, beverages and products to be avoided while on Quinine? 
  • What is the dosage of Quinine to be consumed?
  •  How should I use Quinine? 
  • How will Quinine work on my body? 
  • How can the drug interactions and side effects of Quinine be minimized or completely avoided?

Where can I buy Quinine over the counter?

Quinine over the counter medicine is available only by prescription for the treatment of malaria (which is as Qualaquin). In other countries, quinine without prescription might be available for leg cramps or over-the-counter.

Can I buy Quinine without a prescription?

The Food and Drug Administration (FDA) banned over-the-counter availability of quinine over the counter and marketing of quinine without prescription products for leg cramps. In early 2007, FDA banned all prescription quinine products other than this medicine.



The health and medical information that we have provided are meant to supplement and not substitute the advice of your physician, pharmacists or other health care professionals. This does not suggest that usage of Quinine is safe, appropriate or effective for you. Always ensure that you take this or any other drug only after consulting your physician.