In the ongoing debate between branded-generics and generic drugs without brand names, the concern about drug quality is occupying the center stage, with the former generally being painted in white, and the later in black – with no shades of gray in-between. Interestingly, many large domestic companies manufacture and sell both these genres of generic medicines, and the marketing approval process of both is no different, in a relative yardstick. The degree of difficulty in testing their quality standards, across the country, is no different, either.
On February 25, 2017, even the USFDA, reportedly, raised concerns, for the first time, on the quality and efficacy of medicines, in general, being sold within India. The news report further highlighted: ‘Over the past two years, many domestic majors, including Sun Pharma, Dr. Reddy’s, Cipla and Zydus Cadila have faced regulatory ire over quality of medicines exported from here and sold in the US and other overseas markets’.
It is undeniable, if prescriptions in generic names are made mandatory, there could be direct job losses within the industry, just as loss of significant business clientele of many professional service providers for branded generic business, directly or indirectly. Its net impact needs to be factored-in too, while taking a final decision on this subject.
Lack of enough credible scientific data establishing superiority of branded-generics over their non-branded equivalents are also striking, so are few instances of doctors filing Pharmacovigilance reports with the DCGI on the inferior quality of non-branded generic drugs. Neither is the most competent body in this area – the Central Drugs Standard Control Organization (CDSCO), has concurred with any such claims, so far. Without these, the whole debate based on seemingly over the top claims of superiority of branded generics as a class, is based no more than a matter of conjecture.
I discussed most of these points in one of my earlier articles published in this blog on April 24, 2017. Thus, in this article, I shall focus mostly on an important generic-drug-quality related amendment, very recently made in the Drugs and Cosmetics Act of India, which hasn’t received as much attention as it deserves. This finer note in the drug regulatory playbook, in fact, got nearly masked in the high-decibel cacophony of arguments and counterarguments on Prime Minister Modi’s recent hint on making prescriptions in generic drug names mandatory.
The core issue remains the same, both for non-branded and branded generics:
In the marketing approval process of any branded generic or a non-branded generic drug, Bioequivalence (BE) studies hold immense scientific importance. It ascertains whether the generic equivalent possesses similar efficacy and safety profile as the original molecule for interchangeability. Which is why, in most countries, including Europe and the United States, BE testing is mandatory for approval of any generic drug. Even the large buyers of these drugs, such as the World Health Organization, buy only those generics with proven BE.
Nonetheless, like many other nations, in India, as well, the marketing approval standards for all generic drugs, with or without a brand name, are exactly the same. However, this approval process gets alarmingly relaxed, for both these generic types, with the passage of time, which is the core issue.
New drug definition in India:
According to section 122-E of Drugs and Cosmetics Rules, 1945 (D&C Rules) new drugs will include unapproved drugs, modified or new claims, such as, indications, dosage forms (including sustained release dosage form) and route of administration of already approved drugs and combination of two or more drugs. A new drug shall continue to be considered as new for a period of four years from the date of its first approval or its inclusion in the Indian Pharmacopoeia, whichever is earlier.
BE studies necessary only for ‘New Drugs’:
For all such new drugs and their Fixed Dose Combinations (FDC), including those which are not covered by a patent, if introduced for the first time in India, would necessarily require its applicant to submit the marketing approval documents well-supported by phase III clinical trial data, which includes BE studies against the original molecules. BE of a drug product is achieved if its extent and rate of absorption do not show statistically significant differences from those of the reference product when administered at the same molar dose.
After the 4-year period BE tests not necessary:
Interestingly, after the 4-year period, D&C rules allow subsequent manufacturers of similar drugs to generally rely on the data generated by other pharma companies to obtain marketing approvals for their drugs. In other words, after this 4-year period, manufacturers of branded or non-branded generic drugs are not required to establish comparable safety and efficacy of their formulations with the original molecule through BE and other studies. It is worth noting here, unlike India, BE tests are mandatory for approval of all generic drugs at any time, in most countries across the world.
How would a doctor select only those branded-generics with BE studies?
As there isn’t any easy way to know and identify, both by the doctors and also the patients, which branded or non-branded generics were introduced without BE studies, both these categories pose equal risks to patients – not just the cheaper generic drugs sans brand names.
Changes recommended:
This laxity in the regulatory framework in India did create a lot of uneasiness about the quality of branded and non-branded generic medicines approved by the drug regulators and sold in the country. Responding to this issue, Professor Ranjit Roy Chowdhury Committee Report recommended in July 2013 to make BE and bioavailability studies mandatory for all types of generic drugs, even after the 4-year period.
Cacophony masks an important note:
The good news is, on April 3, 2017, by a Gazette Notification, Indian Government enacted amendments to the Drug and Cosmetics Act (1940) requiring mandatory BE studies for marketing approval of all generic drugs even beyond the 4-year period of the ‘new drug’ definition. It says, “The applicant shall submit the result of bioequivalence study referred to in Schedule Y, along with the application for the grant of a license of the oral dosage form of drugs specified under category II and category IV of the biopharmaceutical classification system.”
Biopharmaceutics Classification System:
The Biopharmaceutics Classification System (BCS) is a scientific framework to differentiate the drug formulations based on their aqueous solubility and intestinal permeability, and mainly depends on two factors:............
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