Peginterferon alfa-2a

  • Part D specialty tier in 80% of formularies (2026Q3)
  • Biologic
  • Pegasys

Therapy management checklist

Screening, baseline and ongoing monitoring with the label's stated frequency, hold and discontinue criteria, and counseling points, each quoted from the FDA label.

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Storage and cold chain

Peginterferon alfa-2a: storage and handling

Refrigerate
Yes, as the label states
Label statement
Store in the refrigerator at 2°C to 8°C (36°F to 46°F).
Freezing
Do not freeze
Label statement
Do not freeze or shake.
Room temperature
up to 1 day
Label statement
Do not leave PEGASYS out of the refrigerator for more than 24 hours.
Back into the refrigerator
Not addressed
Light
Protect from light
Label statement
Protect from light.
Shaking
Not addressed

Temperature excursion helper

Answers only from this label's storage statements. It does not judge whether a product is still usable beyond what the label states.

Within the label's stated room-temperature allowance (up to 1 day). Follow the label's instructions for what to do next.

Entered: 1 day at up to 77°F (25°C).

Do not leave PEGASYS out of the refrigerator for more than 24 hours.
Discard any unused portion remaining in the vial, prefilled syringe.

If anything else happened to the product, or you are unsure, Contact the manufacturer at 1-800-593-2214 (the number printed on the label) about this product.

Where the label prints this number
Patients should be encouraged to register by calling 1-800-593-2214.
All storage statements on the label (7)
  • Store in the refrigerator at 2°C to 8°C (36°F to 46°F).
  • Do not leave PEGASYS out of the refrigerator for more than 24 hours.
  • Do not freeze or shake.
  • Protect from light.
  • Discard any unused portion remaining in the vial, prefilled syringe.
  • Store PEGASYS prefilled syringes in a refrigerator at 36°F to 46°F (2°C to 8°C).
  • Do not freeze or shake PEGASYS.

FDA label version 46, effective September 2, 2026. DailyMed

Dosing and titration calendar

Built only from the schedules the label states (loading, titration, day schedules, cycles and weight bands). Steps the label states in words the calendar cannot place are shown, not guessed.

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Medicare Part D coverage

100%of plans list it
78%of those: prior authorization
0%step therapy
34%quantity limit
97%specialty tier

5,496 Part D plans, CMS formulary files 2026Q3. Look up tier, PA, step therapy and quantity limits by plan

Patient assistance

No manufacturer program page is listed for this drug yet.

Independent foundations and the full directory (checked 2026-11-06). Eligibility and amounts are set by each program; open its page for them.

For licensed clinicians. Use with clinical judgment. Statements are quoted from the FDA label; confirm against the label for the product you are using.