Pharmaceutical Tinctures Overview

Questions and Answers

What is the primary function of alcohol in tinctures?

To improve the color of the solution

To increase the viscosity of the tincture

To act as a preservative and prevent microbial growth (correct)

To enhance the flavor of the tincture

Which of the following statements about tinctures is true?

Tinctures prepared from chemical agents require a simple solution with a solvent. (correct)

Tinctures can only be made using ethanol as a solvent.

Tinctures generally contain alcohol levels from 5% to 10%.

Tinctures can be mixed with any liquid without affecting the solute.

What is the effect of ethanol denaturing organic compounds in tincture preparation?

It has no impact on the extraction process.

It only affects the alcohol-soluble principles.

It enhances the effectiveness of all substances extracted.

It can make some compounds ineffective. (correct)

Which solvent is best known for extracting alkaloids and is suitable for tincture preparation?

Vinegar Signup and view all the answers

Which of the following solvents used in tinctures is considered safer for internal use?

Glycerin Signup and view all the answers

What is the primary chemical reaction involved in the preparation of iodine tincture?

NaI + I2 → NaI3 Signup and view all the answers

What is a key property of tincture iodine when applied to the skin?

It is reddish brown and can stain the skin. Signup and view all the answers

What is the main purpose of compound benzoin tincture?

To protect and toughen skin against various conditions. Signup and view all the answers

Which of the following statements about storage of tinctures is correct?

They should be kept in light-resistant containers to avoid photochemical changes. Signup and view all the answers

How is compound benzoin tincture typically used for respiratory conditions?

Added to boiling water for inhalation of steam vapors. Signup and view all the answers

Study Notes

Characteristics of Tinctures

Tinctures are alcoholic or hydro-alcoholic solutions derived from vegetable or chemical substances.
They vary in preparation methods, active ingredient strength, alcohol content (15% to 80%), and medicinal use.
Alcohol serves as a preservative, preventing microbial growth and maintaining the solubility of extracts.
Mixing tinctures with liquids of diverse solvent characteristics can lead to solute precipitation.

Solvents Used in Tinctures

Ethanol: Acts as an excellent solvent for both acidic and basic substances; also has antibacterial properties.
Glycerin: Used for preparations called glycerites, suitable for individuals avoiding alcohol, and ideal for internal use.
Vinegar: Acidic nature effectively extracts alkaloids.
Ether and Propylene Glycol: Often utilized in externally applied preparations like creams and ointments.

Examples of Tinctures

Tincture Iodine:
- Prepared by dissolving 2% iodine crystals and 2.4% sodium iodide in alcohol and diluted with purified water.
- Functions as a local anti-infective agent, recognized for its reddish-brown color and staining effect on the skin.
- Storage: Must be kept in tight containers to prevent alcohol loss.
Compound Benzoin Tincture:
- Made through the maceration of benzoin, aloe, storax, and tolu balsam in alcohol, including some water and hydrochloric acid.
- Uses include treating bedsores, ulcers, and respiratory conditions via steam inhalation.
- Storage: Requires tightly stoppered containers away from excessive temperatures and light to prevent degradation of constituents.

Description

This quiz explores the characteristics and preparation methods of tinctures used in medicine and pharmacy. Learn about the variations in alcohol content, the role of active ingredients, and different preparation techniques. Suitable for those interested in pharmacology and herbal medicine.