Rez-Q 300mg

What is Rez-Q 300mg?

Rez-Q 300mg is an Indian brand of quinine sulfate, an antimalarial medicine. Each tablet contains quinine sulfate 300 mg. It is made in India by Shreya Life Sciences Pvt Ltd.

What it is used for

According to the UK SmPC for quinine sulfate 300 mg tablets (emc), quinine sulfate is used for falciparum malaria, and treating and preventing night time leg cramps in adults and older people when the cramps regularly disturb sleep. The US label for quinine sulfate capsules carries a boxed warning that using quinine for night time leg cramps can cause serious and life threatening blood reactions, and the FDA has not approved it for that use. Your doctor decides whether it suits you.

Packs and price

Rez-Q 300mg comes in packs of 50, 100 and 200 tablets. The lowest price works out at about $0.42 per tablet on the 200 tablet pack, as of October 2026; the pack selector shows the current price. Shipping is $25 on orders under $149 and free from $149.

Prescription status

Quinine is a prescription medicine in the US and UK. The 300 mg tablet is a UK form; in the US quinine sulfate comes as 324 mg capsules, approved only for malaria. Quinine also needs a prescription in Australia and Canada. Rez-Q 300mg itself is an India made pack and is not approved by the FDA, MHRA, TGA or Health Canada. The FDA says that importing unapproved medicines for personal use is illegal in most circumstances, so check the rules where you live.

Before you order

Read the patient leaflet that comes with the pack. Tell your doctor or pharmacist about any other medicines you take and any health conditions you have. Get urgent medical help if you notice signs of an allergic reaction, such as swelling of the face, lips, tongue or throat, trouble breathing, or a widespread rash.

Delivery

Orders usually arrive in 7 to 14 business days in plain packaging, with a tracking number.