Quinine overdose: Not quite gin and tonic

Area of Science:

• Pharmacology
• Clinical Medicine
• Drug Safety

Background:

• Quinine has a long history of medicinal use, originating in South America and adopted by Western medicine in the 16th century.
• Despite regulatory warnings from agencies like the MHRA and FDA, quinine persists in use for leg cramp treatment.
• The drug's reputation for treating leg cramps is not supported by robust scientific evidence.

Purpose of the Study:

• To critically evaluate the efficacy of quinine in treating leg cramps.
• To review the adverse effects and overdose profile of quinine.
• To provide a scientific perspective on the historical use and current advocacy of quinine treatments.

Main Methods:

• Literature review of historical and contemporary uses of quinine.
• Analysis of regulatory warnings and safety data from the MHRA and FDA.
• Personal reflection on scientific investigations into quinine's therapeutic claims.

Main Results:

• Quinine's effectiveness for leg cramps is largely unsubstantiated.
• Significant risks associated with quinine use, particularly in overdose, are highlighted.
• The continued widespread use contradicts established safety and efficacy concerns.

Conclusions:

• Quinine's use for leg cramps is based on an undeserved reputation, not scientific validation.
• Healthcare providers and patients should be aware of the risks and lack of proven benefit.
• Regulatory guidance against its use should be heeded to ensure patient safety.