Tag Archives: biosimilar

Patients’ Safety, regulatory approval of Biosimilar Drugs in India and WHO Biosimilar guidelines

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Biopharmaceutical drugs are broadly defined as:

”Those medicines produced using a living system or genetically modified organism. These drugs are different from traditional chemical medicines in many ways. Size of the molecule is one of the most obvious distinctions: the molecules of a biopharmaceutical medicine are much larger, have far more complex spatial structures and are much more diverse (“heterogeneous”) than the chemical molecules which make up classical drugs.”

The Biosimilar drugs:

Biosimilar drugs are follow-on versions of original biopharmaceutical medicines. Biosimilar medicines are intended to have the same mechanism of action for the same diseases as the original biopharmaceutical drugs.

The term “bio generic” will be misleading for off patent biopharmaceutical products, as no two biopharmaceutical products could possibly be exactly identical. This is mainly because of the following reason:

“Whereas generics of chemistry based medicines are identical in the molecular structure and therefore copies of the original product, based on a strict definition of “sameness”, a corresponding definition cannot be established for biosimilar medicines because of their nature and the complexity of their manufacturing process. Here post-translational modifications are dependent of the host cell and the process.”

Thus the common terminologies used to describe such products when the original products go off-patent are follow-on biologics and biosimilars.

Manufacturing Conditions of biosimilars ultimately define the final product:

Unlike chemical drugs, the manufacturing conditions and the process followed to produce biopharmaceutical drugs largely define the final product and its quality. Any alteration to the manufacturing process may result in a completely different product. Additionally proteins are relatively unstable. Thus additional measures in their storage, formulation and delivery are very critical.

Key concerns with the existing regulatory approval process for Biosimilar drugs:

• Small changes in the manufacturing process of biosimilar drugs could significantly affect the safety and efficacy of the molecule.

• Due to the very nature of a biologic it is virtually impossible for two different manufacturers to manufacture two identical biopharmaceutical drugs. Identical host expression systems, processes and equivalent technologies need to be demonstrated in extensive comparability trials. Thus, as stated above, a ‘bio generic’ cannot exist.

• As against the situation applicable for generics of chemical molecules which can be replicated, biosimilar drugs cannot be replicated. At the most such biopharmaceuticals can be at the most “similar” but not “identical” to the original reference products. To ensure desired efficacy and safety of biosimilar products, these products should only be approved after charting out a formal and well validated regulatory pathway for the biosimilar drugs in India.

• Currently biosimilar drugs are given marketing approval by the regulator without such guidelines for large molecule biological and following just the bioequivalence model as specified in the Schedule Y of the Drugs and Cosmetics Act (D&CA) of India for small molecule chemical entities only, as the current Drugs and cosmetics Acts of India, very unfortunately, do not differentiate between large and small molecular drugs. This could, in turn, endanger patients’ safety with serious medical consequences.

Although, Central Drugs Standard Control Organization (CDSCO) and the Drugs Controller General of India (DCGI) are responsible for approvals of the new drug applications, health being a state subject, respective state regulatory authorities are responsible for granting manufacturing license to the pharmaceutical manufacturers.

Pharmaceutical manufacturers setting up facilities in the states, where regulatory oversight and incidences of weaker enforcement are common, will be able to market their products, including biosimilars, across the country. It is alleged that there are hardly any regulatory control over the mistakes or offences committed by the State Drug authorities who permit manufacture of drugs even unapproved by the DCGI. The existing issue of mushrooming of various irrational Fixed Dose Combinations (FDC) products in India will vindicate this point.

The Government’s response to this public health concern:

Express Pharma in its June 30, 2009 edition reported Dr M K Bhan, Secretary, Government of India, DBT, saying, “The first question is do we have written guidelines available to people? Currently, we have a large committee of about 30 people in the Review Committee on Genetic Manipulation (RCGM) which frequently discusses the current FDA and EMEA guidelines and makes sure that it is updated as per the guidelines in case by case approvals.”

He acknowledged, to make sure that the product is identical or original is harder for biological than for chemical entities and said, “So the next question is, what is the degree of difficulty you create to be sure that some of the products in the in vitro laboratories and the strength of the biomolecule, are to be characterized in details, and the other side is how expensive should the chemical evaluation be? At this moment, RCGM is seeing the issues and is in touch with both the FDA and the EMEA, and they are taking case by case decisions while trying to standardize the minimum information that is required to show how companies have characterized their products.”

“If we ask a big established company on this issue they will tell us to be strict, whereas a smaller company will suggest otherwise. What we are trying to do is being very scientific and come to a conclusion,” reported Express Pharma quoting Dr. Bhan.

The current practice:

Much water has flown down the bridge since the above interview was published. Nothing much has changed on ground regarding this critical issue, thus far. The industry sources allege that even today regulatory approval of biosimilar drugs (large molecules) are granted based on Phase III clinical trials, as specified in the schedule Y of the Drugs and Cosmetics Acts for the small molecules (chemicals) and that too conducted mostly on just 40 to 45 patients. At times the number of patients studied is even lesser. Immunogenicity study, which is so important for biosimilar drugs is, more often than not, overlooked. This could seriously compromise patients’ safety with such category of drugs.

Conclusion:

It is, indeed, quite surprising that in our country there is still no separate transparent and published guidelines for regulatory approval of Biosimilar drugs even when the World Health Organization (WHO) has come out with the same and India had actively participated in that exercise.
The question, therefore, comes to my mind whether the Biosimilar drugs manufactured in India would conform to international quality and safety standards, like in the U.K or what has been recently announced in the USA? If not, who will address the safety concerns of the patients administering these life saving medicines?

Such a concern gets vindicated by widely reported serious quality problems, detected by the drugs regulatory authorities, at some large and well known Biosimilar drug’s manufacturing units in India, in not too distant past and also from the condition of some vaccine manufacturing units in our country. The recent example of WHO cancelling the pre-qualification of ‘Shan 5’ (Shanta Biotech) vaccines for quality related problems, perhaps may help opening the eyes of our regulators, on the related patients’ safety issues arising out of regulatory laxity.

This issue assumes even greater importance considering the very recent development of the Department of Biotechnology (DBT) unfolding an interesting scheme to encourage development of biosimialr dugs in India by offering financial support to the domestic pharmaceutical and biopharmaceutical industry.

The proposed new regulatory pathway for the marketing approval of Biosimilar drugs in India will immensely help paving the way for the Biopharmaceuticals drugs manufacturers in India to adequately prepare themselves to grab a significant share of the fast emerging Biosimilar drugs markets, particularly, in Europe and the USA, in the years to come.

The Ministry of Health and the Department of Biotechnology of the Government of India should, therefore, urgently and jointly consider amending the Drugs & Cosmetics Acts of India accordingly and establish robust regulatory guidelines for marketing approval of biosimilar drugs in the country, acknowledging the widespread concern for patients’ safety.

By Tapan Ray

Disclaimer: The views/opinions expressed in this article are entirely my own, written in my individual and personal capacity. I do not represent any other person or organization for this opinion.

 

With significant competitive edge should Global Biotech Companies consider entry into high potential ‘Biosimilar drugs’ business?

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‘Biosimilar drugs’ – rapid future growth potential:
In most of the developed countries of the world, besides regulatory issues, ‘Biosimilar drugs’are considered a threat to the fast growing global biotech industry. However, many believe that innovative biotech companies can have a head start with all wherewithals at their disposal, compared to generic pharmaceutical companies, to convert this seemingly significant threat into a bright emerging opportunity and derive the best possible mileage out of such changing environment.

Sandoz (Novartis) – first to launch a ‘Biosimilar drug’ in the USA:

In mid 2006, US FDA approved its first ‘Biosimilar drug’; Omnitrope of Sandoz (Novartis) following a court directive in the U.S. Omnitrope is a copycat version of Pfizer’s human growth hormone, Genotropin. Interestingly, Sandoz (Novartis) had taken the U.S FDA to court as the regulatory approval of Omnitrope was kept pending by them, in absence of a defined regulatory pathway for ‘Biosimilar drugs’ in USA.

The CEO of Sandoz had then commented, “The FDA’s approval is a breakthrough in our goal of making high-quality and cost-effective follow-on biotechnology medicines like Omnitrope available for healthcare providers and patients worldwide.” Despite this event, no one at that time expected the U.S FDA to start commencing approval of other ‘Biosimilar drugs’ within the country.

‘Biosimilar drugs’ – emerging global interest:

Thereafter, many developments are fast taking place in the space of ‘Biosimilar drugs’, the world over. To fetch maximum benefits out of this emerging opportunity, India is also taking steps to tighten its regulatory reform process for ‘Biosimilar drugs’ to allay general fear and apprehensions regarding safety of such drugs, in absence of adequate clinical data for the specific protein substance.

Merck’s entry in ‘Biosimilar drugs’ business is through an acquisition:

In the west Merck announced its entry into the ‘Biosimilar drugs’ business on February 12, 2009, while announcing its acquisition of Insmed’s portfolio of ‘Biosimilar drugs’ for U.S$130 million in cash. Rich pipeline of follow-on biologics of Insmed is expected to help Merck to hasten its entry into global ‘Biosimilar drugs’ markets.

Current status of ‘Biosimilar drugs’ in the USA:

The new administration of President Barak Obama has expressed its strong intent to pave the way for regulatory guidelines for ‘Biosimilar drugs’ in the USA. To facilitate this process, the new draft legislation titled, “Promoting Innovation and Access to Life Saving Medicine Act” has already been introduced by the legislators of the country. This legislation, when will come into force would help define guidelines for approval of ‘Biosimilar drugs’ in the USA with just a five year exclusivity period to the innovative products, against a demand of 14 years by the global biotechnology industry.

Lucrative Global market potential for ‘Biosimilar drugs’:

It is estimated that only in the top two largest pharmaceutical markets of the world, USA and EU, sales of ‘Biosimilar drugs’ will record a turnover of U.S$ 16 billion in next two years and around U.S$ 60 billion by year 2010, when about 60 biotech products will go off-patent.

Opportunity for the Indian biotech companies:

Such a lucrative business opportunity in the west will obviously attract many Indian players, like, Biocon, Dr. Reddy’s Labs, Ranbaxy, Wockhardt etc, who have already acquired expertise in the development of ‘Biosimilar drugs’ in India like, erythropoietin, insulin, monoclonal antibodies, interferon-alfa. Domestic Indian biotech players are not only marketing these products in India but also exporting them to other non/less-regulated markets of the world.

Indian Companies are fast preparing to take a sizable share of the global pie of ‘Biosimilar drugs’ market:

Ranbaxy in collaboration with Zenotech Laboratories is engaged in global development of Granulocyte Colony-Stimulating Factor (GCSF) formulations. Wockhards is expected to enter into the Global ‘Biosimilar drugs’ market by 2010. Dr. Reddy’s Laboratories and Biocon are also preparing themselves for global development and marketing of insulin products, GCSF and streptokinase formulations.

Government of India funding for development of ‘Biosimilar drugs’ in India:

It has been reported that the Department of Biotechnology (DBT) of the Government of India has a proposal for funding of U.S$ 68 million through public private partnership (PPP) initiatives, where soft loans at the rate of interest of just 2% will be made available to the Indian biotech companies for development of ‘Biosimilar drugs’. Currently DBT spends around U.S$200 million annually towards biotechnology related initiatives.

Advantage India:

Experience in conforming to stringent U.S FDA manufacturing standards, having largest number of U.S FDA approved plant outside USA; India has acquired a great advantage in manufacturing similar high technology products in India. Significant improvement in conformance to Good Clinical Practices (GCP) standards in India offers additional advantages.

Two available choices for the innovator companies:

With increasing global cost-containment pressures within the healthcare space, emergence of a lucrative global ‘Biosimilar drugs’ market with appropriate defined regulatory pathway in place is inevitable now.

Major global research based companies will now have two clear choices in the fast evolving situation. The first choice is the conventional one of competing with the ‘Biosimilar drugs’ in all important markets of the world. However, the second choice of jumping into the fray of ‘Biosimilar drugs’ business keeping focus on R&D undiluted, appears to be more prudent to me and perhaps will also make a better business sense. Only future will tell us, which of these two business senses will prevail, in the long run for the global biotech companies.

By Tapan Ray

Disclaimer: The views/opinions expressed in this article are entirely my own, written in my individual and personal capacity. I do not represent any other person or organization for this opinion.

Biosimilar Drugs -A raging scientific debate with mounting global commercial interest

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On December 11, 2008, Reuters reported that two days after Merck & Co. announced a major push into generic versions of biotechnology medicines, Eli Lilly & Co. signaled similar aspirations. This report raised many eyebrows in the global pharmaceutical industry, in the midst of a raging scientific debate on this issue. Be that as it may, many felt that this announcement ushered in the beginning of a new era. An era of intense future competition with Biosimilar drugs in the world market with immense commercial interest.Globally, the scenario for generic versions of biotechnology medicines, which are called Biosimilars, Biogenerics or follow-on Biologics, started heating up when Merck announced that the company expects to have atleast 5 follow-on biologics in the late stage development by 2012. The announcement of both Merck and Eli Lilly surprised many, as the largest pharmaceutical market of the world – the U.S.A is yet to approve the regulatory pathway for generic biologic medicines. In the developed world, European Union (EU) has taken a lead towards this direction by already having a system in place for regulatory approval of Biosimilar drugs in 2003.What then prompts the research based global pharmaceutical companies like Merck and Eli Lilly to step into the arena of Biosimilar medicines? Is it gradual drying up research pipeline together with skyrocketing cost of global R&D initiatives?

The future business potential of Biosimilar medicines:

Currently, over 150 different biologic medicines are available in the Global Pharmaceutical market. However, the low cost Biosimilar drugs are available in just around 11 countries of the world, India being one of them. Supporters of Biosimilar medicines are indeed swelling as time passes by. At present, the key global players are Sandoz (Novartis), Teva, BioPartners, BioGenerix (Ratiopharm) and Bioceuticals (Stada). This market is expected to develop slowly because of regulatory hurdles in the major countries of the world.

Very recently, the EU has approved Sandoz’s (Novartis) Filgrastim (Neupogen brand of Amgen), which is prescribed for the treatment of Neutropenia. With Filgrastim, Sandoz will now have 3 Biosimilar products in its portfolio.

Raging debate on Biosimilar Drugs still continues:

The debate is centered on the argument that like small chemical molecules is it possible to replicate large biological molecule of the innovator? It is widely believed that a protein cannot be absolutely replicated. How could possibly then Biosimilar drugs be considered equivalent to the original product by a regulator and marketing approval be granted to them without full scale clinical trials ignoring safety concerns of the patients? In favor of this argument some refer to the problem of red cell aplasia that affected many patients administering Johnson & Johnson’s Exprex (Epoetin) after only a minor change made in its manufacturing procedure.

Hurdles to cross for future Market entry of Biosimilar Drugs:

Emergence of second generation branded biosimilar products such as PEGylated products Pegasys and PegIntron (peginterferon alpha) and Neulasta (pegfilgrastim), and insulin analogs etc. have the potential to reduce the market size for first generation Biosimilar drugs creating significant entry barrier.

Even otherwise, the barriers to market entry of Biosimilar drugs are much higher than any small molecule generic drug. In the markets within EU, many companies face the challenge of higher development costs for biosimilar drugs because of stringent regulatory requirements and greater lead time for product development. Navigating through such a tough regulatory environment will demand a different type of skill sets from the generic companies not only in areas of clinical trials and pharmacovigilance, but also in areas of manufacturing and marketing. Consequently, the investment needed to take Biosimilar drugs from clinical trials to launch in the developed markets, will indeed be quite significant.

Current Scenario in the U.S:

Recently in the U.S.A, the new, widely reported, biotechnology policy of President Barak Obama has become one of the most closely watched healthcare policy initiatives of the country. It is expected that such a policy will help facilitate regulatory approval process of Biosimilar drugs in the USA by end 2009. This new policy initiative could have a major impact on many biotech companies who will face new generic competition, rather quickly. On the other hand, it will prove to be a boon to the new entrants in this market like, Merck and Eli Lilly, besides the existing ones.

Global Market Potential of Biosimilar Drugs:

The biosimilar drug market in the world is estimated to be around U.S. $ 16 billion by 2011. Currently, off-patent biologic blockbusters including Erythropoietin offer an excellent commercial opportunity in this category of drugs. By 2013, about 10 branded biologics with a total turnover of around U.S. $ 15 billion will go off-patent.

Biosimilar Drugs in India:

Sales of biosimilar drugs in India are estimated to be around U.S. $ 4 billion by 2011.

Biosimilar drugs fall under high growth segment within Indian pharmaceutical Industry. Recombinant vaccines, erythropoietin, recombinant insulin, monoclonal antibody, interferon alpha, granulocyte cell stimulating factor like products are manufactured by a number of domestic biotech companies like Biocon, Panacea Biotech, Wockhardt, Emcure, Shantha Biotech, Bharat Biotech, Serum Institute of India, Dr. Reddy’s, Ranbaxy, etc. The ultimate objective of all these Indian companies, I am sure, will be to get regulatory approval of such products in the EU and then in the U.S. when the time comes.

It is worth mentioning here that to give a fillip to the Biotech Industry in India, the National Biotechnology Board was set up by the Government of India under the Ministry of Science and Technology in 1982 and the Department of Biotechnology (DBT) came into existence in 1986. The DBT now spends around US$ 200 million annually to develop biotech resources in the country and have been making reasonably good progress. The DBT is reported to have undertaken an initiative to prepare regulatory guidelines for Biosimilar Drugs, which is expected to conform to international quality and patients’ safety requirements.

The points to ponder with the Biosimilar Drugs in India:

It is, indeed, quite surprising that in India there is still no separate transparent and published guidelines for regulatory approval of Biosimilar drugs, although the Drug Controller General of India (DCGI) seems to have a different view in this matter. The Drugs and Cosmetics Acts of India have no separate provisions either, for Biosimilar Drugs. In a situation like this, we find that many Biosimilar Drugs are still getting regulatory approval in India.

Currently India supplies 30% by volume of the global requirements of generic drugs both in regulated and non-regulated markets. In the regulated markets like North America and EU, for small molecule generic products, Indian manufacturers conform to the global safety and efficacy standards by getting these products approved by the most stringent regulators of the world like, U.S. FDA, MHRA (Medicines and Healthcare products Regulatory Agency) etc. The very fact that none of the Biosimilar drugs developed in India could get approval in the EU as yet, may well suggest that the stringent regulatory requirements for both efficacy and patients’ safety followed in the EU for Biosimilar drugs, could not be met by the Indian manufacturers, as yet. The question, therefore, comes to my mind whether the Biosimilar drugs manufactured in India conform to international quality and safety standards? If not, who will address the safety concerns of the patients who are or will be administering these medicines?

Such a concern gets vindicated by widely reported serious quality problems, detected by the drug regulatory authorities, at some large and well known Biosimilar drugs manufacturing units in India and also from the condition of some vaccine manufacturing units in our country.

India needs to manufacture the world class Biosimilar drugs conforming to the highest efficacy and patients’ safety standards, just the way Indian pharmaceutical manufacturers have demonstrated with ‘made in India’ generic drugs, the world over. The Indian drug regulatory authority should now take some important initiative with the publication of world class Biosimilar drugs regulatory approval guidelines, may be following the similar process as what we see in the EU.

Currently, experts from India are participating towards preparation of ‘WHO Guidelines’ for Biosimilar Drugs. The progress made towards this direction is yet to be ascertained. Simultaneously, the DBT is reported to have under taken an independent initiative to prepare similar guidelines, the progress of which is also yet to be known.

Before other developed markets open up for Biosimilar drugs, if India can align itself with its own world class regulatory standards for the same, yet another significant export opportunity could be created for the country, competing with the best performers of the world in this category.

Meanwhile, it will only be good to know that like many other initiatives, India has taken one more important initiative to address this important issue, for the sake of humanity. As the existing process of granting regulatory approval for Biosimilar drugs continues in India, the lurking fear towards patients’ safety with such drugs will remain unabated with a large majority of experts in this field.

By Tapan Ray

Disclaimer: The views/opinions expressed in this article are entirely my own, written in my individual and personal capacity. I do not represent any other person or organization for this opinion.