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These two packaging configurations are not regarded as pharmaceutically equivalent; thus, they are not designated as therapeutically equivalent.Preservatives and other inactive ingredients may differ among some therapeutically equivalent drug products.
For 505(b)(2) pathway, the Orange Book uses the term Listed Drug.
In those circumstances where the characteristics of a specific product, other than its active ingredient, are important in the therapy of a particular patient, the practitioner's prescribing of that product may be appropriate. 105 of a drug is a distinct drug product and, therefore, a distinct listed drug. If you are a frequent reader of our blog, you know that the 505(b)(2) pathway can facilitate a cheaper, faster drug approval route. When such differences are important in the care of a particular patient, it may be appropriate for the prescribing physician to require that a specific product be dispensed as a medical necessity. FDA notes that under Section 506I(a) of the FD&C Act, applicants must notify the Agency in writing 180 days prior to withdrawing a drug product from sale, or if 180 days is not practicable, not later than the date of withdrawal from sale. These differences do not affect FDA's evaluation of therapeutic equivalence except in cases where these components may influence bioequivalence or routes of administration.The specific sub-codes for those drugs evaluated as therapeutically equivalent and the policies underlying these sub-codes follow: Multisource drug products listed under the same heading (i.e., identical active ingredients(s), dosage form, and route(s) of administration) and having the same strength (see Section 1.2, In certain instances, a number is added to the end of the Uncertainty regarding the therapeutic equivalence of aerosolized products arises primarily because of differences in the drug delivery system. FDA’s determination that such products are therapeutically equivalent is applicable only when each product is reconstituted, stored, and used under the conditions specified in its labeling.The Agency may use notes in this publication to point out special situations, such as potential differences between two drug products that have been evaluated as bioequivalent and otherwise therapeutically equivalent, when they should be brought to the attention of health professionals. Camargo recently worked with a sponsor developing a product with an API that was part of a class of drugs with a long history of use. These notes are contained in Section 1.8, For example, occasionally a situation may arise in which changes in a listed drug product after its approval (for example, a change in dosing interval) may have an impact on the substitutability of already approved generic versions of that product that were rated by the Agency as therapeutically equivalent to the listed product. To the extent that conventions for describing product identification information (i.e., active ingredients, dosage forms, routes of administration, product names, applicants, strengths) evolve over time, the Agency generally does not intend to revise such information for drug products already listed in the Orange Book, but rather intends to apply the change prospectively to drug products as they are added to the Orange Book. If an applicant has a question related to the appropriate reference standard, it is recommended that an applicant planning to conduct an The Orange Book contains public information and advice.
These procedures will be used when a change in therapeutic equivalence code is under consideration for all drug products found in the Prescription Drug Product List under a specific active ingredient and dosage form.
Extended-release products for which such bioequivalence data have not been submitted are coded Where the drug may be destroyed or inactivated by the gastric juice or where it may irritate the gastric mucosa, the use of “enteric” coatings is indicated.
Therapeutic equivalence evaluations are a scientific judgment based upon evidence, while generic substitution may involve social and economic policy administered by the states, e.g., reducing the cost of drugs to consumers. Injectable oil solutions are therefore considered to be pharmaceutically and therapeutically equivalent only when the active ingredient, its concentration, and the type of oil used as a vehicle are all identical.It should be noted that even though injectable (parenteral) products under a specific listing may be evaluated as therapeutically equivalent, there may be important differences among the products in the general category, Injectable; Injection. For example, historically some injectable products that are rated therapeutically equivalent are labeled for different routes of administration. You can contact the Orange Book Staff by email at The Annual Edition and current monthly Cumulative Supplement are available in a Portable Document Format (PDF) at the In addition, some products evaluated as therapeutically equivalent may have different preservatives or no preservatives at all.
An explanation of the codes appears in the A complete discussion of the background and basis of FDA's therapeutic equivalence evaluation policy was published in the On September 24, 1984, the President signed into law the Drug Price Competition and Patent Term Restoration Act of 1984 (Hatch-Waxman Amendments).
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