Independent register of U.S. FDA drug recalls · updated Oct 10, 2026
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Class III · Low risk Completed Initiated Apr 25, 2024 (2 years ago)

Valacyclovir Tablets USP

Class III — Low risk. Unlikely to cause harm, but violates FDA regulations.

Why it was recalled

Failed Tablet/Capsule Specifications: There is a potential for the imprint, M 122, to be missing on some tablets.

Cause type: Failed specification

A physical or chemical test other than potency, dissolution, impurity or stability failed - pH, viscosity, appearance, tablet integrity, fill volume. A product outside its own specification may not perform as designed, even if the active ingredient is present. All failed specification recalls.

What was recalled

Valacyclovir Tablets USP, 500 mg, 90 count bottles, Rx Only, Manufactured for: Mylan Pharmaceuticals Inc. Morgantown, WV 26505 USA, NDC 0378-4275-77

Affected NDC 0378-4275-77

Compare with the code on your package — it is the most precise check available.

Drug: Acyclovir

Product details

From the FDA NDC directory, for the product code this recall names. Compare with the label on your package.

ProductStrengthForm & routeLabelerType
Valacyclovir Hydrochloride
valacyclovir
NDC 00378-4275
HYDROCHLORIDE 500 mg/1 Tablet, Film Coated
Oral
Mylan Pharmaceuticals Inc. Rx
Recalling firm
Viatris Inc
NDC code
0378-4275-77
Origin
PA, United States
Initiated by
Voluntary: Firm initiated
FDA recall number
D-0481-2024 · FDA notice

Low risk, still worth a check. Class III means the product is unlikely to cause harm but breaks an FDA rule (often labeling). If your lot matches, your pharmacy will normally swap it; there is no need for alarm. This recall is now completed, which means the firm has finished removing the affected product; anything on pharmacy shelves today should be unaffected.

Other Acyclovir recalls

See all
Class II · Moderate risk

Acyclovir Sodium Injection

Presence of Particulate Matter: Customer complaint for a dark red, brown and black particulate floating inside vial.

Completed Particulate / foreign matter AuroMedics Pharma LLC NDC 55150-154-10 D-0013-2023
Class III · Low risk

Acyclovir Tablets

Labeling: Incorrect or Missing Lot and/or Exp Date

Terminated Labeling / mix-up Heritage Pharmaceuticals Inc NDC 23155-227-01 D-0367-2021

Other recalls by Viatris Inc

All 2024 recalls
Class II · Moderate risk

Xanax XR

Failed Dissolution Specifications

Ongoing Dissolution failure Viatris, Inc. NDC 58151-506-91 D-0444-2026
Class II · Moderate risk

Cardura XL

Failed Impurities/Degradation Specifications: Out of specification results observed for the impurity compound B during stability testing.

Terminated Impurity / degradation Viatris Inc NDC 58151-078-93 D-0204-2025
Class II · Moderate risk

Cardura XL

Failed Impurities/Degradation Specifications: Out of specification results observed for the impurity compound B during stability testing.

Terminated Impurity / degradation Viatris Inc NDC 58151-079-93 D-0203-2025