NDC 44523-053-01 HUMAN PRESCRIPTION DRUG

Drug Status:  Active

Proprietary Name: Tiopronin

Drug Overview

The NDC Code 44523-053-01 is assigned to “Tiopronin ” (also known as: “Tiopronin”), a human prescription drug labeled by “BioComp Pharma, Inc.”. The product's dosage form is tablet, sugar coated, and is administered via oral form.

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Drug Information
NDC Package Code	44523-053-01
	The labeler code, product code, and package code segments of the National Drug Code number, separated by hyphens. Asterisks are no longer used or included within the product and package code segments to indicate certain configurations of the NDC.
Product NDC	44523-053
	The labeler code and product code segments of the National Drug Code number, separated by a hyphen. Asterisks are no longer used or included within the product code segment to indicate certain configurations of the NDC.
11 Digit NDC Code	44523-0053-01
	It should be noted that many NDCs are displayed on drug packaging in a 10-digit format. Proper billing of an NDC requires an 11-digit number in a 5-4-2 format. Converting NDCs from a 10-digit to 11-digit format requires a strategically placed zero, dependent upon the 10-digit format.
Proprietary Name	Tiopronin
	Also known as the trade name. It is the name of the product chosen by the labeler.
Non Proprietary Name	Tiopronin
	Sometimes called the generic name, this is usually the active ingredient(s) of the product.
Product Type Name	HUMAN PRESCRIPTION DRUG
	Indicates the type of product, such as Human Prescription Drug or Human OTC Drug. This data element corresponds to the “Document Type” of the SPL submission for the listing. The complete list of codes and translations can be found at www.fda.gov/edrls under Structured Product Labeling Resources.
Labeler Name	BioComp Pharma, Inc.
	Name of Company corresponding to the labeler code segment of the ProductNDC.
Status	Active
	Possible status values: Active Active NDC Code Deprecated Deprecated NDC Code Unfinished (Unapproved) The following status describes submitted unfinished drugs, including the marketing categories of Active Pharmaceutical Ingredient (API), Drug for Further Processing, Bulk for Human Drug Compounding, and Bulk for Animal Drug Compounding. FDA does not review and approve unfinished products. Therefore, all products having "unfinished" status are considered unapproved.
Description	Tiopronin immediate-release tablets are a reducing and cystine-binding thiol drug (CBTD) for oral use. Tiopronin is N-(2-Mercaptopropionyl) glycine and has the following structure:. Adverse reactions occurring at an incidence of ≥5% in an uncontrolled trial in 66 patients with cystinuria age 9 to 68 years are shown in the table below. Patients in group 1 had previously been treated with d-penicillamine; those in group 2 had not. Of those patients who had stopped taking d-penicillamine due to toxicity (34 out of 49 patients in group 1), 22 were able to continue treatment with Tiopronin Tablets. In those without prior history of d-penicillamine treatment, 6% developed reactions of sufficient severity to require Tiopronin Tablets withdrawal. Table 1 presents adverse reactions ≥5% in either treatment group occurring in this trial. Taste Disturbance A reduction in taste perception may develop. It is believed to be the result of chelation of trace metals by tiopronin. Hypogeusia is often self-limited. Tiopronin has the empirical formula C 5H 9NO 3S and a molecular weight of 163.20. In this drug product tiopronin exists as a dl racemic mixture. Tiopronin is a white crystalline powder, which is freely soluble in water. Each Tiopronin Tablet contains 100 mg of tiopronin. The inactive ingredients in Tiopronin Tablets include calcium carbonate, carnauba wax, ethyl cellulose, dimethylaminoethyl methacrylate: butyl methacrylate: methyl methacrylate copolymer (Eudragit E 100), hydroxy-propyl cellulose, lactose monohydrate, magnesium stearate, povidone, sugar, talc, titanium dioxide.
	General information about the drug product, including the proprietary and established name of the drug, the type of dosage form and route of administration to which the label applies, qualitative and quantitative ingredient information, the pharmacologic or therapeutic class of the drug, and the chemical name and structural formula of the drug.
Indication And Usage	Tiopronin Tablets are indicated, in combination with high fluid intake, alkali, and diet modification, for the prevention of cystine stone formation in adults and pediatric patients 20 kg and greater with severe homozygous cystinuria, who are not responsive to these measures alone.
	A statement of each of the drug productÕs indications for use, such as for the treatment, prevention, mitigation, cure, or diagnosis of a disease or condition, or of a manifestation of a recognized disease or condition, or for the relief of symptoms associated with a recognized disease or condition.This field may also describe any relevant limitations of use.

Route & Dosage
Dosage Form Name	TABLET, SUGAR COATED
	The translation of the DosageForm Code submitted by the firm. The complete list of codes and translations can be found www.fda.gov/edrls under Structured Product Labeling Resources.
Route Name	ORAL
	The translation of the Route Code submitted by the firm, indicating route of administration. The complete list of codes and translations can be found at www.fda.gov/edrls under Structured Product Labeling Resources.
Pharmaceutical Classes	CYSTINE DISULFIDE REDUCTION [MOA], N-SUBSTITUTED GLYCINES [CS], REDUCING AND COMPLEXING THIOL [EPC]
	These are the reported pharmaceutical class categories corresponding to the SubstanceNames listed above.

Substance & Strength
Substance Name	TIOPRONIN (Substance Adverse Reports) - 100 mg/1
	This is the active ingredient list. Each ingredient name is the preferred term of the UNII code submitted.

Drug Package Information
NDC Package Code	44523-053-01
	The labeler code, product code, and package code segments of the National Drug Code number, separated by hyphens. Asterisks are no longer used or included within the product and package code segments to indicate certain configurations of the NDC.
Package Description	100 TABLET, SUGAR COATED IN 1 BOTTLE (44523-053-01)
	A description of the size and type of packaging in sentence form. Multilevel packages will have the descriptions concatenated together. For example: 4 BOTTLES in 1 CARTON/100 TABLETS in 1 BOTTLE.
Sample Package	N
	Defines whether given package serves sample purposes.
Package NDC Exclude Flag	N
	This indicates whether the package has been removed/excluded from the NDC Directory for failure to respond to FDA’s requests for correction to deficient or non-compliant submissions.
Package Start Marketing Date	20260901
	This is the date that the labeler indicates was the start of its marketing of the drug package.
Package End Marketing Date	N/S (NOT SPECIFIED)
	This is the date the package will no longer be available on the market. If a package is no longer being manufactured, in most cases, the FDA recommends firms use the expiration date of the last lot produced as the EndMarketingDate, to reflect the potential for drug product to remain available after manufacturing has ceased. Packages that are the subject of ongoing manufacturing will not ordinarily have any EndMarketingDate. Packages with a value in the EndMarketingDate will be removed from the NDC Directory when the EndMarketingDate is reached.

Product Application & Marketing Information
Product NDC	44523-053
	The labeler code and product code segments of the National Drug Code number, separated by a hyphen. Asterisks are no longer used or included within the product code segment to indicate certain configurations of the NDC.
Application Number	NDA019569
	This corresponds to the NDA, ANDA, or BLA number reported by the labeler for products which have the corresponding Marketing Category designated. If the designated Marketing Category is OTC Monograph Final or OTC Monograph Not Final, then the Application number will be the CFR citation corresponding to the appropriate Monograph (e.g. “part 341”). For unapproved drugs, this field will be null.
Marketing Category Name	NDA AUTHORIZED GENERIC
	Product types are broken down into several potential Marketing Categories, such as NDA/ANDA/BLA, OTC Monograph, or Unapproved Drug. One and only one Marketing Category may be chosen for a product, not all marketing categories are available to all product types. Currently, only final marketed product categories are included. The complete list of codes and translations can be found at www.fda.gov/edrls under Structured Product Labeling Resources.
Listing Record Certified Through	20271231
	This is the date when the listing record will expire if not updated or certified by the firm.
Product Marketing Start Date	20260901
	This is the date that the labeler indicates was the start of its marketing of the drug product.
Product Marketing End Date	N/S (NOT SPECIFIED)
	This is the date the product will no longer be available on the market. If a product is no longer being manufactured, in most cases, the FDA recommends firms use the expiration date of the last lot produced as the EndMarketingDate, to reflect the potential for drug product to remain available after manufacturing has ceased. Products that are the subject of ongoing manufacturing will not ordinarily have any EndMarketingDate. Products with a value in the EndMarketingDate will be removed from the NDC Directory when the EndMarketingDate is reached.
Product NDC Exclude Flag	N
	This indicates whether the product has been removed/excluded from the NDC Directory for failure to respond to FDA’s requests for correction to deficient or non-compliant submissions.

Tracking Information
Last Update Date	2026-09-01
	The date that a record was last updated or changed.