---
type: "Bill"
title: "Pharmacy; allowing a pharmacist to substitute interchangeable product for certain prescriptions; requiring certain communication. Effective date."
description: "Pharmacy; allowing a pharmacist to substitute interchangeable product for certain prescriptions; requiring certain communication. Effective date."
jurisdiction: "us/states/ok"
legislature: "Oklahoma Legislature"
session: "2021"
identifier: "SB 4"
citation: "Oklahoma SB 4 (2021)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Garvin", "Marti"]
version_count: 8
action_count: 21
vote_count: 0
first_action: "2021-02-01"
last_action: "2021-04-22"
source: "openstates"
source_identifier: "ocd-bill/2fca4c98-5e0b-4307-b7e9-da3c771bd654"
source_url: "http://www.oklegislature.gov/BillInfo.aspx?Bill=SB4&session=2100"
source_hash: "050694500bae363033ebd8fc4e1a33812389dfa2c7a9886c01ee12b4a51e95b9"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-ok"]
---

# Oklahoma SB 4 (2021) — Pharmacy; allowing a pharmacist to substitute interchangeable product for certain prescriptions; requiring certain communication. Effective date.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Introduced** (filed) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2021-22 INT/SB/SB4 INT.PDF)
2. **Engrossed** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2021-22 ENGR/SB/SB4 ENGR.PDF)
3. **Enrolled (final version)** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2021-22 ENR/SB/SB4 ENR.PDF)
4. **Floor (House)** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2021-22 FLR/HFLR/SB4 HFLR.PDF)
5. **Floor (Senate)** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2021-22 FLR/SFLR/SB4 SFLR.PDF)
6. **SB4 (2-25-21) (GARVIN) FS FA1.PDF** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2021-22 FLOOR AMENDMENTS/Senate/SB4 (2-25-21) (GARVIN) FS FA1.PDF)
7. **SB4 (2-25-21) (GARVIN) FS WDFA1.PDF** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2021-22 FLOOR AMENDMENTS/Senate/SB4 (2-25-21) (GARVIN) FS WDFA1.PDF)
8. **SB4 (3-09-21) (GARVIN) FS FA2.PDF** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2021-22 FLOOR AMENDMENTS/Senate/SB4 (3-09-21) (GARVIN) FS FA2.PDF)

## Sponsors

- Garvin — primary (person)
- Marti — primary (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2021-02-01** First Reading `introduction, reading-1`
- **2021-02-01** Authored by Senator McCortney
- **2021-02-01** Remove as author Senator McCortney; authored by Senator Garvin
- **2021-02-02** Second Reading referred to Health and Human Services `reading-2, referral-committee`
- **2021-02-03** Reported Do Pass Health and Human Services committee; CR filed `committee-passage`
- **2021-02-18** Coauthored by Representative Marti (principal House author)
- **2021-03-10** General Order, Amended by Floor Substitute
- **2021-03-10** Measure passed: Ayes: 44 Nays: 0 `passage`
- **2021-03-10** Referred for engrossment
- **2021-03-11** Engrossed to House `passage`
- **2021-03-11** First Reading `introduction, reading-1`
- **2021-03-22** Second Reading referred to Public Health `reading-2, referral-committee`
- **2021-03-31** CR; Do Pass Public Health Committee `committee-passage`
- **2021-04-15** General Order
- **2021-04-15** Third Reading, Measure passed: Ayes: 88 Nays: 0 `passage, reading-3`
- **2021-04-15** Signed, returned to Senate
- **2021-04-15** Referred for enrollment
- **2021-04-19** Enrolled, to House
- **2021-04-19** Signed, returned to Senate
- **2021-04-19** Sent to Governor `executive-receipt`
- **2021-04-22** Approved by Governor 04/22/2021 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/2fca4c98-5e0b-4307-b7e9-da3c771bd654`. Confidence: reported (aggregated from official Oklahoma legislature records).