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ISORDIL vs TRIDIL

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 22, 2026·How we rate

Possible drug interaction. ISORDIL and TRIDIL are different prescription medicines. Combining or switching between them can cause interactions — talk to a pharmacist or prescriber before making changes. This page is not medical advice.

Rating

New
60/100

Pharmacy pays

~$6.05 /30
~$4.23 /30

Type

RX
RX

Active ingredient

ISOSORBIDE DINITRATE
NITROGLYCERIN

Manufacturer

Dosage forms

Tablet
Injectable

Drug class

Nitrate Vasodilator
Nitrate Vasodilator

Boxed warning

None
None

Treats

Angina Pectoris, Coronary Disease, Cyanosis
Angina Pectoris, Eclampsia, Fissure in Ano

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Frequently asked questions

Which is cheaper, Isordil or Tridil?

Tridil costs pharmacies less to acquire — about $4.23 vs $6.05 for a 30-count supply, per the CMS NADAC survey. That gap is in the pharmacy's cost of goods, not necessarily in what you pay: your price is set afterwards by your insurer and the pharmacy.

What is the difference between Isordil and Tridil?

Isordil contains Isosorbide Dinitrate, while Tridil contains Nitroglycerin — they have different active ingredients.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.