RX504 Pill — WHITE CAPSULE, 14mm — Acyclovir

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Imprint	RX504
Colour	WHITE
Shape	CAPSULE
Size	14
Strength	ACYCLOVIR 400 mg
Dosage form	Tablet
Manufacturer	Stat Rx USA
NDC	16590-370
Schedule	—
Availability	—
Ingredients	ACYCLOVIR[ACYCLOVIR]

What does this imprint mean?

The imprint "RX504" 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

Acyclovir

Uses and warnings

No boxed warning. Contraindicated in patients who "develop hypersensitivity to acyclovir or valacyclovir." Key warnings: "Renal failure, in some cases resulting in death, has been observed with acyclovir therapy," particularly with inadequate hydration or in patients with underlying renal impairment; and "Thrombotic thrombocytopenic purpura/hemolytic uremic syndrome (TTP/HUS), which has resulted in death, has occurred in immunocompromised patients receiving acyclovir therapy."

Acyclovir tablets are indicated for: - Acute treatment of herpes zoster (shingles) - Treatment of initial episodes and management of recurrent episodes of genital herpes - Treatment of chickenpox (varicella). The label notes effectiveness is greatest when therapy is started early after symptom onset.

Read the full drug profile →

How to identify this pill

• Check the imprint matches exactly: "RX504".
• Confirm the colour (WHITE) and shape (CAPSULE).
• Compare the size (14) against a ruler if possible.
• When in doubt, confirm with a pharmacist before taking any medication.

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