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Links to Topic of Interest March 2023 We have published instructions for the synthesis of 52 pterins Oct 2020 Jan. 2016 New address Nov. 2014 New email address Feb. 2014 New Compound June 2013 Products listed as an Excel file with CAS numbers. March 2013 We have to adjust Pteridine prices. October 2011 Tetrahydrobiopterin tablets 10 mg and 50 mg are sold out. April 2010 Diminishing stocks of Tetrahydrobiopterin tablets January 2010 Biomarin and Merck Serono main suppliers of Tetrahydrobiopterin (Sapropterin dihydrochloride)... Nov. 2009 Merck Serono expands Kuvan market in Europe. Dec. 2008
We have published instructions We have published instructions for the synthesis of 52 pterins on the website of Schircks Laboratories.
These instructions do not meet the requirements for publication in scientific journals and these instructions are not written in correct English, but with these detailed instructions a skilled chemist can prepare the substance described.
These instructions may be used free of charge, but copyright applies.
We only sell
Schircks Laboratories now only has two staff members, Ms Zingg and myself.
I am 74 years old and no longer produces any substances.
We still have sufficient amounts of many substances in storage to supply you. Retests are carried out regularly with all substances.
Ms Zingg will reach her pension age spring 2021. However, she will continue to manage the sale of substances of Schircks Laboratories.
New address Schircks Laboratories, Postfach, 8494 Bauma, Switzerland New email address The company Dotster has suspended our domain name. From now one you can contact us under the following email address: firstname.lastname@example.org New Compound February 2014 Please note that the compound product number 16.500 7-Hydroxymethotrexate is again available. Products listed as an Excel file
Our new price list can be found on our website presented alphabetically or numerically as pdf files with links to our data sheets or numerically as an Excel file with CAS numbers. We have to adjust Pteridine prices
We have to adjust Pteridine prices. The prices will automatically change April 1, 2013. Tetrahydrobiopterin tablets are sold out
Tetrahydrobiopterin tablets 10 mg and 50 mg are sold out. Unfortunately there is nothing we can do to change this dissatisfactory situation.
Although Schircks Laboratories sold tetrahydrobiopterin tablets on a compassionate use basis over 25 years, we did not have a marketing authorization. Orphan drug law only came into effect in 2002. Biomarin and Merck Serono could take advantage of these new laws and because they had adequate financial assets to support the clinical trials. Schircks Laboratories had no chance to compete. Biomarin and Merck Serono performed all clinical trials required to get approval for a new drug. They received marketing authorizations as an orphan drug in the USA, Japan and Europe. As a result no other company can legally sell medication containing tetrahydrobiopterin in the USA, Japan and Europe over the next 10 years.
Although we applied for a marketing authorization in Switzerland and had not much missing to receive approval here, the loss of the US, Japanese and European markets to Biomarin and Merck Serono made it impossible to remain viable.
We never and in no way whatsoever cooperated with Biomarin and Merck Serono.
We would like to thank you for the pleasant co-operation over the years.
We now only have a limited stock of Tetrahydrobiopterin tablets remaining. We are only accepting orders from existing customers from low income developing countries until our stock is depleted. We cannot accept orders from any new patients from any country. Taking into account that tablets from Merck Serono will be about three times more expensive than our tablets, we urge you not to start treatment of new patients with Tetrahydrobiopterin tablets until the financial side of the treatment is examined. Otherwise the relief of the strain of the diet will be replaced with bigger financial strain. Biomarin and Merck Serono
Biomarin and Merck Serono have taken over the Tetrahydrobiopterin tablet market. We have had to cease production of tetrahydrobiopterin. We now only have a limited stock of Tetrahydrobiopterin tablets remaining. We can only accept orders from low income developing countries until our stock is depleted. Unfortunately there is nothing we can do to change this situation. We would like to thank you for the pleasant cooperation through many years. Please note that the active substance (Sapropterin dihydrochloride) in Biomarin/Merck Serono`s tablets Kuvan is the same as that in Schircks Laboratories Tetrahydrobiopterin tablets. Sapropterin dihydrochloride is another name for Tetrahydrobiopterin (BH4). Please contact Biomarin/Merck Serono to ensure a continuous supply of tablets.
Merck Serono expands Kuvan market
In November 2009 Merck Serono (www.merckserono.com) took over the market in Great Britain, France, Germany, Spain, Austria, Greek, Denmark, Hungary, Italy and Netherlands.
Doctors, clinics, health authorities and ethic commissions depended on the supply of tetrahydrobiopterin provided on a compassionate use / named patient basis from Schircks Laboratories over the last 28 years. Because tetrahydrobiopterin deficiency is a very rare disorder it was impossible to perform organized clinical trials.
In 1999 it was found that a larger group of PKU/HPA patients also responded to treatment with Schircks Laboratories tetrahydrobiopterin. Clinical trials were organized and data was collected by Biomarin and after FDA approval in 2007, they started to supply the US Market 2008. Tetrahydrobiopterin is an orphan drug. Special regulations apply to the sale of this product. Merck Serono received marketing authorization for the sale of tetrahyrobiopterin (sapropterin) in Europe December 2, 2008. Schircks Laboratories is legally obliged to discontinue the sale of tetrahydrobiopterin to Europe as soon as Merck Serono brings their product Kuvan on the market. We will keep you informed of changes as they come about.
Biomarin and Merck Serono will only sell unscored 100 mg sapropterin tablets.
Because there have been extensive clinical trials for their product on large groups of patients, the cost of the tablets is expected to be higher than those supplied by Schircks Laboratories.
However, it is expected that health funds are more likely to cover a product, which has a marketing authorization.
We will keep you informed of changes on our website. For updates, please check this website regularly.
We would appreciate if you could correct your records and inform any additional members of your institutes of the changes.