‘Clinical Trial provides remedies for catarrh, colds and upper
Hidden among the lush greenery away from the hustle and bustle of
city life the Link Natural production facility rejuvenates the herbal
medicine industry by linking it with new technology while retaining its
roots. The manufacturing process of all generic ayurvedic
pharmaceuticals and herbal healthcare at Link is done with precision and
great care under hygienic standards. The production process of every
product is guided by a highly experienced team of professionals with the
contribution of the management team.
Packing Link Samahan into boxes manually at the Factory in Dompe
After it was established in 1982, the company has experienced immense
growth with over 200 items in their product line. Being a research
oriented company Link has given numerous products to both local and
international markets. In 1995 the company launched the herbal remedy
Samahan that became a well known brand in the country as well as beyond
local shores. Comprising of 14 herbal ingredients, Link Samahan has been
proved clinically and scientifically as a remedy to prevent and cure a
number of genral sicknesses.
Colds, cataarh and viral inflammations of the throat are far and away
the commonest ailments that afflict human beings. They give rise to a
large number of symptoms which interfere with our daily lives in several
In addition, some symptoms have important commercial considerations
and negative effects on the national economy.
They affect our life-styles in several ways. In adult men and women,
these symptoms adversely affect our office work, household tasks
(including parenting, helping with school homework, and spending quality
time with our children), and social activities. They may also affect our
leisure activities such as sports and hobbies.
If we have to frequently consult doctors, then out-of-pocket expenses
for consultations, laboratory tests and medications, will strain our
personal budgets, said chairman Link Natural Dr. Devapriya Nugawela.
In the context of the highly competitive examination system that
prevails in Sri Lanka, the effect of these troublesome symptoms by way
of lost students’ study time and concentration, acquires particular
At a higher level, staff absenteeism, their decreased efficiency and
productivity, and the resulting loss of man-hours can have deleterious
commercial outcomes for a particular company or institution, and
negative outcomes for the national economy.
At present, the only treatment available for these symptoms of colds,
cataarh and throat inflammation is to take prescribed or self-selected
medicines and rest at home for some days. There is no medicine to
prevent them or minimize their occurrence.
New scientific clinical research has provided the ideal remedy.
It is accepted world-wide that the three essential properties that
any medicinal product must have safety, efficacy and quality
And there is also world-wide agreement that for testing these
properties scientifically, the “ gold standard” is a “ randomized
controlled clinical trial”.
The remedy for the prevention of these 15 symptoms and reducing their
severity has emerged from a randomized controlled clinical trial done in
Sri Lanka, on a Sri Lankan medicinal product.
A trailblazer RCCT had been conducted by Professor Colvin Goonaratna,
a former Chairman of the State Pharmaceuticals Corporation (1994 to 2001
) and a Senior Professor of the Faculty of Medicine in the Colombo
University, together with Professor Roshini Sooriyarachchi of the
Department of Statistics of the same University, on the highly popular
herbal medicine product Link Samahan.
The results of their RCCT have been published in the prestigious
Ceylon Medical Journal ( CMJ 2012; 57 : 19 – 32), which conforms to the
highest international editorial standards, and is listed in and
abstracted by the Index Medicus, Biosis, Embase, CABI and Elsevier
Scopus. The professors recruited over 800 healthy volunteers for this
study, which lasted for 12 weeks.
A “ test group” which comprised 386 volunteers took one sachet of
Link Samahan daily during this period, dissolved in hot water and a “
control group” of 415 volunteers took a cup of plain tea daily at about
the same time. Allocation to the “ control group “ or the “ test group”
was by statistically acceptable randomization. During this period each
volunteer recorded daily on a specially designed and colour-coded form
whether or not they had any one or more than one of these 15 symptoms,
and if they had, the severity of the relevant symptom as mild, moderate
or severe. This is how Professor Colvin Goonaratna tells the rest of the
“We had to obtain approval from the Ethical Review Committee of the
Sri Lanka Medical Association ( SLMA) and register the approved trial
with the Sri Lanka Clinical Trials Registry ( SLCTR), a primary national
registry directly linked on-line to the World Health Organization ( WHO)
International Clinical Trials Registry Platform ( ICTRP). The SLCTR
provides on-line open access to the essential features of all registered
clinical trials in Sri Lanka” stated Professor Goonaratna.
“ With over 800 volunteer participants, recording daily the status of
15 symptoms and their severity over a period of 84 days, at the end of
our RCCT, several million bits of data had to be carefully entered by
trained data entry operators, and their entries had to be checked for
accuracy. The “cleaned” data were independently reviewed and
statistically analysed by a team of experts under the supervision and
guidance of Professor Roshini Sooriyarachchi, at the Statistics
Department of the Colombo University” he further stated."
“The results that emerged from the statistical operations were
startling. They may be summarized as follows-The average incidence of
all 15 symptoms were highly significantly reduced in the Link Samahan
group(ie. test group) when compared to the “ control group” Even the
symptoms that occurred ( much less frequently ) in the Link Samahan
group, as indicated above, were less severe than in the control group
that did not take Samahan.
There is no other medicinal product in either the allopathic ( ie. “
western” ) or in any other system of medicine, which has been shown by a
scientifically acceptable RCCT to prevent ( by reducing their incidence
) and reduce the severity of all the 15 symptoms simultaneously, except
Link Samahan. And our RCCT is the largest ever RCCT of any kind of
medicinal product in Sri Lanka, and the largest RCCT for a herbal
product in entire Australasia. The simple remedy for minimizing the 15
symptoms and their severity is to take one sachet of Link Smahan daily
in hot water, tea or coffee.
The Managing Director of Linea Aqua Sharinda Unamboowe, states that
the RCCT was conducted at their garment factory and that during the
trial and after that time, absenteeism was much lower and the
productivity was much higher among the employees who took Link Samahan
daily, than in those who did not take it. As a result, Unamboowe now
encourages his employees to take one sachet of Link Samahan daily.