The strengths of tinctures vary widely; for instance, aconite and veratrum viride have extremely small doses due to their toxicity. In contrast, ipecac and opium tincture has larger doses because it is made from less potent drugs. Tinctures are prepared using alcohol or diluted alcohol as the menstruum, while medicated wines use wine fortified with additional alcohol. Fluid extracts represent one gram of drug per cubic centimeter and vary greatly in strength and practicality. Solid extracts are made by separating soluble matter through maceration or percolation followed by solvent elimination. Oleoresins are ethereal extracts prepared using ether as the menstruum, such as male fern oleoresin.
<Callout type="important" title="Uniform Standards">Fluid extracts have a uniform standard of strength but this does not mean all fluid extracts will have the same dose; some may be less than a drop while others could be over five hundred times larger.</Callout>
Pharmacopoeias are authoritative books containing definitions, descriptions, and standards for medicinal substances. The American Pharmacopoeia is revised every ten years by a committee appointed by the Pharmacopoeial Convention.
Key Takeaways
- Tinctures and fluid extracts vary widely in strength, making it crucial to understand the specific dose for each.
- Solid extracts are made by separating soluble matter through maceration or percolation followed by solvent elimination.
- Oleoresins are ethereal extracts prepared using ether as the menstruum.
Practical Tips
- Always refer to the pharmacopoeia for accurate dosages and preparation methods of medicinal substances.
- Understand that fluid extract strengths can vary widely, so it's important to know specific doses for each type.
Warnings & Risks
- Tinctures made from extremely poisonous drugs like aconite require very small doses due to their toxicity.
- Medicinal preparations must be prepared according to precise standards to ensure safety and efficacy.
Modern Application
While the specific preparation methods described here are outdated, understanding the principles of medicinal extract strengths and dosages remains crucial. Modern survival medicine relies on similar concepts but uses more standardized and regulated products.
Frequently Asked Questions
Q: What is the difference between a tincture and a fluid extract?
A tincture is made using alcohol or diluted alcohol as the menstruum, while a fluid extract represents one gram of drug per cubic centimeter.
Q: How are solid extracts prepared?
Solid extracts are prepared by separating soluble matter through maceration or percolation followed by solvent elimination to achieve a pilular consistency.
Q: What is an oleoresin and how is it made?
An oleoresin is an ethereal extract prepared using ether as the menstruum, such as in the case of male fern oleoresin which involves percolation through a stopcocked glass percolator.