DILTIAZEM 24H ER(XR) 180 MG CP

What it is

DILTIAZEM 24H ER(XR) 180 MG CP is how the CMS NADAC file names this product. The FDA NDC Directory lists it as diltiazem hydrochloride.

FDA gives its dosage form as capsule, extended release and its route as oral.

Its labelers, the companies named on the label, are NORTHSTAR RX LLC, Alembic Pharmaceuticals Inc. and Slate Run Pharmaceuticals, LLC.

FDA’s Established Pharmacologic Class for it is Calcium Channel Blocker.

The NADAC file of 2026-10-14 prices it under 4 NDCs (National Drug Codes).

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 $10.99 for 30 capsules (30 × $0.36629 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 capsules · NADAC explanation codes

All 4 NDCs

• 16714-0524-01 · NORTHSTAR RX LLC · $0.36629 per EA · eff. 2026-09-23 filed
• 16714-0524-02 · NORTHSTAR RX LLC · $0.36629 per EA · eff. 2026-09-23 filed
• 62332-0816-31 · Alembic Pharmaceuticals Inc. · $0.36629 per EA · eff. 2026-09-23 filed
• 70436-0192-01 · Slate Run Pharmaceuticals, LLC · $0.36629 per EA · eff. 2026-09-23 filed

Other strengths, forms and brands

38 other products in the NADAC file share the FDA nonproprietary name diltiazem hydrochloride with DILTIAZEM 24H ER(XR) 180 MG CP. The 23 below share a strength or dosage form with it first; search OpenBill for the rest.

Part D is one average per brand and generic name, over every strength and form.

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

Medicare Part D · DSD_PTD_RY26_P04_V10_DY24_BGM.csv · eff. 2024-01-01 to 2024-12-31 · as of 2026-06-25 · retrieved 2026-10-18

Compared with its class

The middle of its 4 NDCs’ NADAC prices is $0.36629 per EA filed.

Of the 107 other products in FDA’s Calcium Channel Blocker class priced per EA, 64 have a higher middle NADAC price and 42 a lower one; 1 has the same. The one in the middle is DILTIAZEM 24H ER(LA) 240 MG TB, at $1.0087 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

Medicare Part D paid $14.14 for 30 capsules, at an average of $0.47134 per EA in 2024 (2024-01-01 to 2024-12-31) for “Diltiazem 24hr ER (XR)” and “Diltiazem HCl”, every strength and form sold under that name together (Medicare Part D Spending by Drug, file of 2026-06-25).

That average covers 209,383 Part D claims (fills, including refills) for 2024-01-01 to 2024-12-31, across every maker, strength and form under the name.

Medicare's price is not your price.

What Part D spending measures · Which Medicare figure OpenBill compares · How the spread is worked out

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 capsules? Is it lower than what I would pay through my insurance?
• If you have Medicare Part D: what is my plan’s copay or coinsurance for it? The Part D average on this page is not what you pay.
• These are questions about price, not medical advice. Do not change or stop a medicine without talking to your prescriber or pharmacist.