Pharmacognosy - medicinal plants (herbs)

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Theme VI: Extraction methods


Defining the infusion method. What is an infusion? How to infuse?

What is an infusion?

An infusion is a dilute solution of easily soluble constituents of the raw drug.

Is suitable for the aromatic drugs, to prevent volatile oils evaporate at other temperatures.

How to make an infusion?

The infusion is carried out by immersing the plants parts to use in an amount of boiling water, allowed to stand 15 minutes and then filtered through a filter or filter paper.

There are in the market many herbal drugs properly packed in filter paper envelopes suitable for this process without using additional utensils.

Overall doses are approximately one gram of plant per 10 cc of water.

Examples of beneficial infusions

Here are some examples of infusions of medicinal plants with healing properties or health benefits. Click on the plant to see more details of this.

Tea - Medicinal plants


Tea consumption it´s prescribed in psychophysical asthenia, diarrhea, bronchitis, asthma and as adjunct in the treatment of overweight, arteriosclerosis and hyperlipidemia. Prepare the infusion by adding one teaspoon of tea leaves or the powdered tea equivalent, on a boiling water cup and let stand for 10 min...


Medicinal PlantsTea

Medicinal Herbs

Basil - Medicinal plants


The infusion of the basil leaves is use for the gonorrhea. A basil light infusion is used to fight vomiting...


Medicinal PlantsBasil

Medicinal Herbs

Guava - Medicinal plants


Antibiotic properties are attributed to the decoction or infusion of guava leaves...


Medicinal Plants - Guava

Medicinal Herbs

Papaya - Medicinal plants


The infusion of the flowers is emmenagogue, febrifuge and expectorant...


Medicinal PlantsPapaya

Medicinal Herbs

Passion flower - Medicinal plants

Passiflora or Passion flower

Infusion of Passiflora: Add 130 ml of boiling water over a teaspoon of the plant, wait 10 minutes and strain. Take 2 or 3 times a day and half an hour before bedtime...


Medicinal PlantsPassiflora

Medicinal Herbs

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