"Once ingested, the stomach breaks down oral phenylephrine tablets so much that it's inconsistently — if at all — absorbed into the bloodstream, which would allow the medication to then work ...

The findings and pending decision do not apply to phenylephrine nasal spray. Only oral formulations (such as tablets, capsules, and oral liquids) of phenylephrine are considered ineffective for ...

Phenylephrine, a common ingredient found in many over-the-counter cold medications, has long been thought to be a reliable decongestant. However, recent studies are questioning its effectiveness ...