Page 31 - Pharmacognosy-I (02-06-06-102)

Contraindications Flaxseed is contraindicated in the following conditions:
In case of acute inflammatory illnesses of the intestine, of the esophagus and
of the stomach entrance.

Precautions and adverse reactions
General: No health hazards or side effects are known in conjunction with
the proper administration of designated therapeutic dosages.

Black Mustard Seed

Medicinal part: The dried ripe seed of Brassica nigra, family Cruciferae. It
yields not less than 0.7% allylisothiocyanate
Constituents:
1-Black mustard seeds contains about 4% of the thioglycoside, sinigrin and
the enzyme myrosin ; after maceration with water at 37 Cº, yields 0.7 –
1.3% volatile oil.
2-The volatile oil contain over 90% of allylisothiocyanate.
3-The seeds also contains about 27% of fixed oil and 10 % mucilage

Note: Breaking Brassica nigra seeds and mixing with water confers the

flavor to the mustard paste, similar to that of horseradish. This flavor is due
to allylisothiocyanate (volatile compound) released from the degradation of

sinigrin during a hydrolytic reaction called the
“mustard oil bomb”

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