W1 Pill — YELLOW ROUND, 9mm — Isosorbide Dinitrate

Imprint	W1
Colour	YELLOW
Shape	ROUND
Size	9
Strength	Isosorbide Dinitrate 2.5 mg
Dosage form	Tablet
Manufacturer	Golden State Medical Supply, Inc.
NDC	60429-108
Schedule	—
Availability	—
Ingredients	Isosorbide Dinitrate[ISOSORBIDE]

What does this imprint mean?

The imprint "W1" is a code stamped or printed on the tablet or capsule by the manufacturer, used to identify the drug, its strength and the maker.

Active ingredient

Isosorbide Dinitrate

Uses and warnings

No boxed warning. Key warnings: concomitant use with PDE5 inhibitors is dangerous because "amplification of the vasodilatory effects of isosorbide dinitrate by sildenafil can result in severe hypotension"; "severe hypotension, particularly with upright posture, may occur with even small doses"; and tolerance develops with continuous use, requiring "a daily dose-free interval to minimize the development of this tolerance."

Isosorbide dinitrate sublingual tablets are indicated for the prevention and treatment of angina pectoris due to coronary artery disease." The label notes it is not the preferred agent for acute attacks because "the onset of action of sublingual ISDN is significantly slower than that of sublingual nitroglycerin.

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How to identify this pill

• Check the imprint matches exactly: "W1".
• Confirm the colour (YELLOW) and shape (ROUND).
• Compare the size (9) against a ruler if possible.
• When in doubt, confirm with a pharmacist before taking any medication.

W1 Pill — YELLOW ROUND, 9mm — Isosorbide Dinitrate

What does this imprint mean?

Active ingredient

Uses and warnings

How to identify this pill

Similar-looking pills

Other pills of Isosorbide Dinitrate

Official references