21 CFR Part 312 · Investigational New Drug Application

21 CFR 312.33

Annual reports

21 CFR 312.33 is the regulation titled “Annual reports” in 21 CFR Part 312, Investigational New Drug Application. Since 2021, 1 FDA warning letter has cited it.

Letters citing it
1 since 2021
Jan 1 to Oct 30, 2026
0 against 0 on the same dates in 2025
Most often cited with
21 CFR 312.305, in 1 letter
Closed out
0% of these letters have a published close-out
See the letter citing 21 CFR 312.33 →

Letters citing it, by year issued

It is a drug letter. 2026 runs to Oct 30, 2026. Pick a year to see its letters.

  1. 02021
  2. 02022
  3. 02023
  4. 12024
  5. 02025
  6. 02026

The regulation

Read the text of 21 CFR 312.33 (eCFR, as of Sep 1, 2026)

A sponsor shall within 60 days of the anniversary date that the IND went into effect, submit a brief report of the progress of the investigation that includes:

(a) Individual study information. A brief summary of the status of each study in progress and each study completed during the previous year. The summary is required to include the following information for each study:

(1) The title of the study (with any appropriate study identifiers such as protocol number), its purpose, a brief statement identifying the patient population, and a statement as to whether the study is completed.

(2) The total number of subjects initially planned for inclusion in the study; the number entered into the study to date, tabulated by age group, gender, and race; the number whose participation in the study was completed as planned; and the number who dropped out of the study for any reason.

(3) If the study has been completed, or if interim results are known, a brief description of any available study results.

(b) Summary information. Information obtained during the previous year's clinical and nonclinical investigations, including:

(1) A narrative or tabular summary showing the most frequent and most serious adverse experiences by body system.

(2) A summary of all IND safety reports submitted during the past year.

(3) A list of subjects who died during participation in the investigation, with the cause of death for each subject.

(4) A list of subjects who dropped out during the course of the investigation in association with any adverse experience, whether or not thought to be drug related.

(5) A brief description of what, if anything, was obtained that is pertinent to an understanding of the drug's actions, including, for example, information about dose response, information from controlled trials, and information about bioavailability.

(6) A list of the preclinical studies (including animal studies) completed or in progress during the past year and a summary of the major preclinical findings.

(7) A summary of any significant manufacturing or microbiological changes made during the past year.

(c) A description of the general investigational plan for the coming year to replace that submitted 1 year earlier. The general investigational plan shall contain the information required under § 312.23(a)(3)(iv).

(d) If the investigator brochure has been revised, a description of the revision and a copy of the new brochure.

(e) A description of any significant Phase 1 protocol modifications made during the previous year and not previously reported to the IND in a protocol amendment.

(f) A brief summary of significant foreign marketing developments with the drug during the past year, such as approval of marketing in any country or withdrawal or suspension from marketing in any country.

(g) If desired by the sponsor, a log of any outstanding business with respect to the IND for which the sponsor requests or expects a reply, comment, or meeting.

[52 FR 8831, Mar. 19, 1987, as amended at 52 FR 23031, June 17, 1987; 63 FR 6862, Feb. 11, 1998; 67 FR 9585, Mar. 4, 2002]

Text from eCFR as of Sep 1, 2026.

Cited alongside it

Regulations that appear in the same letters as 21 CFR 312.33.

Latest letters citing it

The letter citing 21 CFR 312.33 that FDA posted most recently.

See the letter citing 21 CFR 312.33 →
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