SOPALGIN
-Paracetamol is a para-aminophenol derivative, it is a non-Opioid
non-salicylate. It has analgesic, antipyretic properties and weak
anti-inflammatory Activity.
-Paracetamol produces central and peripheral analgesia by
elevation of the pain threshold and inhibition of prostaglandin
biosynthesis, and antipyretic action through the effect on the
hypothalamic heat-regulating center, resulting in peripheral
vasodilatation, increased blood flow through the skin, sweating
and heat loss.
-Paracetamol is readily absorbed from the gastro-intestinal tract
with beak plasma concentration occurring about 10 to 60 minutes
after oral administration.
-Paracetamol is distributed into most body tissues. It crosses the
placenta and is presents in breast milk .
-Paracetamol is metabolised predominantly in the liver and
excreted in the urine mainly as the glucuronide and sulphate
conjugates. Less than 5% is excreted as unchanged Paracetamol
-The elimination half-life of Paracetamol varies form about
1to3 hours.
-Caffeine is absorbed readily after oral does and is widely
distributed in the body. It is also absorbed through the skin.
-Caffeine passes really in to the CNS. Appears in low
concentration in breast milk and it crosses the placenta.
-Caffeine is metabolised almost Completely in the liver and
excreted in urine.
-The elimination half- life of Caffeine are about 3 to 7 hours.
-Codeine phosphate is absorbed from the gastrointestinal tract,
ingestion of Codeine phosphate produces peak plasma- codeine
concentrations in about one hour ,crosses the placenta and is
present in breast milk.
- The elimination half life of Codeine phosphate about 3- 7hours.
Codeine phosphate is metabolised by O- and N-demethylation in
the liver to morphine, nor-codeine, and other metabolites including
normorphine and hydrocodone. Codeine and its metabolites are
excreted almost entirely by the kidney, mainly as conjugates with
glucuronic acid.