Macrogol as Excipient
Polyethylene glycol (PEG), as pharmaceutical substance well known under the name Macrogol, is used as an osmotic-type laxative to treat constipation or to clear the colon before coloscopy.
Polyethylene glycols are polymers of ethylene oxide with the following chemical structure:
HOCH2-[CH2-CH2 -O]n-CH2OH (n: average number of EO-units).
Within the pharmaceutical industry the number included in the names of polyethylene glycols
indicates the average molecular weight.
PEGs with a molecular weight up to 400 are non-volatile, clear, viscous, colourless or almost colourless hygroscopic liquids at 25C. They are used as drops, parenterals and fillings for gelatin capsules.
Polyethylene glycols with a molecular weight above 3000 are white or almost white solids with a waxy or paraffin like appearance and available as powder. They are used as ointment bases, tablet bindings, film coatings and lubricants.
Macrogol 3350 & Macrogol 4000, widely used as active ingredients, have the ability to bind a
defined amount of water, which is transmitted immediately into the large intestine.
There it softens the stool and increases the stool volume, which leads to a stimulation of
intestinal peristalsis and increases the number of bowel movements.
|Macrogol 200||Polyethylene glycol, PEG||NF|
|Macrogol 400||Polyethylene glycol, PEG||EP/NF|
|Macrogol 3350||Polyethylene glycol, PEG||BP/EP/NF Certificate of suitability (CEP)|
|Macrogol 4000||Polyethylene glycol, PEG||BP/EP/NF Certificate of suitability (CEP)|
|Macrogol 6000||Polyethylene glycol, PEG||BP/EP/NF|
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