ACYCLOVIR 400 MG TABLET

What it is

ACYCLOVIR 400 MG TABLET is how the CMS NADAC file names this product. The FDA NDC Directory lists it as acyclovir.

FDA gives its dosage form as tablet and its route as oral.

FDA lists 11 labelers (the companies named on the label) for its NDCs, among them Major Pharmaceuticals, Heritage Pharmaceuticals Inc. d/b/a Avet Pharmaceuticals Inc. and Camber Pharmaceuticals, Inc.

FDA lists it under 3 Established Pharmacologic Classes: Herpes Simplex Virus Nucleoside Analog DNA Polymerase Inhibitor, Herpes Zoster Virus Nucleoside Analog DNA Polymerase Inhibitor and Herpesvirus Nucleoside Analog DNA Polymerase Inhibitor.

The NADAC file of 2026-10-14 prices it under 21 NDCs (National Drug Codes); the FDA directory lists 19 of them.

NADAC classes it as a generic drug (rate-setting class G), and does not mark it as sold over the counter.

What pharmacies pay

Pharmacies pay $2.89 for 30 tablets (30 × $0.09623 per EA, rounded to the cent), by the CMS NADAC file of 2026-10-14; that price took effect on 2026-09-23. That is what pharmacies pay their suppliers, not what they charge you.

NADAC’s explanation code for it: 1, calculated from the most recently completed pharmacy survey.

What NADAC measures · Why 30 tablets · NADAC explanation codes

The 11 labelers

Other strengths, forms and brands

5 other products in the NADAC file share the FDA nonproprietary name acyclovir with ACYCLOVIR 400 MG TABLET.

CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. 2026-09-23, 2026-09-30 · as of 2026-10-14 · retrieved 2026-10-17

Compared with its class

The middle of its 21 NDCs’ NADAC prices is $0.09623 per EA filed.

Of the 6 other products in FDA’s Herpes Simplex Virus Nucleoside Analog DNA Polymerase Inhibitor class priced per EA, 6 have a higher middle NADAC price and 0 a lower one. The one in the middle is VALACYCLOVIR HCL 500 MG TABLET, at $0.22889 per EA filed (eff. 2026-09-23).

Of the 6 other products in FDA’s Herpes Zoster Virus Nucleoside Analog DNA Polymerase Inhibitor class priced per EA, 6 have a higher middle NADAC price and 0 a lower one. The one in the middle is VALACYCLOVIR HCL 500 MG TABLET, at $0.22889 per EA filed (eff. 2026-09-23).

Of the 9 other products in FDA’s Herpesvirus Nucleoside Analog DNA Polymerase Inhibitor class priced per EA, 9 have a higher middle NADAC price and 0 a lower one. The one in the middle is VALACYCLOVIR HCL 1 GRAM TABLET, at $0.41001 per EA filed (eff. 2026-09-23).

Prices are compared per unit, whatever the strength or dose, and a class is not a list of substitutes.

CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. 2026-09-23 · as of 2026-10-14 · retrieved 2026-10-17

How the class comparison works

What Medicare paid

We don’t know yet; the card above says why.

Which Medicare figure OpenBill compares · How Part D is matched · How Part B is matched

What to ask at the counter

None of these figures is your price: what you pay depends on your pharmacy, your insurance, coupons and discounts.

• What is your cash price for 30 tablets? Is it lower than what I would pay through my insurance?
• These are questions about price, not medical advice. Do not change or stop a medicine without talking to your prescriber or pharmacist.