FR4 Pill – Red Oval Sinus Decongestant PHENYLEPHRINE HYDROCHLORIDE 5 mg
Quick Identification
The pill with imprint FR4 is a red oval tablet/capsule identified as Sinus Decongestant PHENYLEPHRINE HYDROCHLORIDE 5 mg.
| Imprint | FR4 |
|---|---|
| Shape | OVAL |
| Colour | RED |
| Size | 11 |
| Strength | PHENYLEPHRINE HYDROCHLORIDE 5 mg |
| Dosage form | Tablet |
What Does This Imprint Mean?
The characters "FR4" stamped, printed, or debossed onto this pill are its imprint code. Manufacturers are required by the FDA to give every tablet and capsule a unique imprint so it can be identified after it leaves its original packaging. Combined with the pill's shape and colour, the imprint is the fastest way to confirm exactly what a loose pill is.
Active Ingredient: Sinus Decongestant
Generic name: Sinus Decongestant. This pill contains PHENYLEPHRINE HYDROCHLORIDE 5 mg.
Manufacturer & NDC
| Manufacturer | Honeywell Safety Products USA, Inc |
|---|---|
| NDC | 0498-3331 |
How to Identify This Pill
- Read the imprint code exactly as it appears (letters, numbers, and any dividing line) — it is the single most reliable identifier.
- Note the shape (round, oval, capsule, etc.) and colour, and compare both against the details above.
- Check the size if you have a ruler or pill gauge — imprint plus size narrows down look-alikes.
- Compare the pill photo above side-by-side with the physical pill in good lighting.
- If anything does not match exactly, do not assume — confirm with a pharmacist before taking it.
Similar-Looking Pills
These pills share the same shape and colour, but are different medications — always confirm by imprint, not appearance alone.
Frequently Asked Questions
What does the pill imprinted FR4 look like?
It is described as a red oval pill measuring about 11, imprinted with "FR4".
What is Sinus Decongestant used for?
See the Sinus Decongestant drug page for full usage information.
What strength is this Sinus Decongestant pill?
This pill is PHENYLEPHRINE HYDROCHLORIDE 5 mg of Sinus Decongestant.
Who makes this pill?
It is manufactured by Honeywell Safety Products USA, Inc.
Is it safe to take a pill if I cannot identify it?
No. Never take a pill you cannot positively identify. If you are unsure about a pill, do not take it — consult a pharmacist or physician, or contact Poison Control.
