phenylephrine (Neo-Synephrine, Mydrifin, sudafed PE, PE)

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Introduction

Tradename: Neo-Synephrine, sudafed PE[6].

Indications

* on list of medications to avoid for treatment of allergic rhinitis & viral rhinitis[11]

Contraindications

narrow-angle glaucoma

pregnancy category = c

safety in lactation = -

safety in lactation = ?

safety in lactation = ?

Dosage

Nasal spray: 0.125%, 0.25%, 0.5%, 1%. Ophthalmic agent: Tradenames: Neo-synephrine, Mydrifin. Ophthalmic agent: 2.5% (15 mL) 10% (5 mL).

Injection: 10 mg/mL (1 mL).

Pharmacokinetics

  • topical (intraocular, nasal) administration
    • onset of action within minutes
    • duration of action is 0.5 to 4 hours
  • IV administration

elimination via plasma

Adverse effects

Drug interactions

Mechanism of action

* NOT as effective of pseudoephedrine[7]

* NOT effective[12]

More general terms

Component of

References

  1. The Pharmacological Basis of Therapeutics, 9th ed. Gilman et al, eds. Permagon Press/McGraw Hill, 1996
  2. 2.0 2.1 Faga LJ, American Family Physician 58:1795-1802, 1998
  3. 3.0 3.1 Drug Information & Medication Formulary, Veterans Affairs, Central California Health Care System, 1st ed., Ravnan et al eds, 1998
  4. 4.0 4.1 Kaiser Permanente Northern California Regional Drug Formulary, 1998
  5. Mangione CM, In: UCLA Intensive Course in Geriatric Medicine & Board Review, Marina Del Ray, CA, Sept 12-15, 2001
  6. 6.0 6.1 6.2 Prescriber's Letter 12(3): 2005 Sudafed PE Nasal Decongestant Detail-Document#: http://prescribersletter.com/(5bhgn1a4ni4cyp2tvybwfh55)/pl/ArticleDD.aspx?li=1&st=1&cs=&s=PRL&pt=3&fpt=25&dd=210310&pb=PRL (subscription needed) http://www.prescribersletter.com
  7. 7.0 7.1 Prescriber's Letter 13(12): 2006 Changes to OTC cough and Cold products Detail-Document#: http://prescribersletter.com/(5bhgn1a4ni4cyp2tvybwfh55)/pl/ArticleDD.aspx?li=1&st=1&cs=&s=PRL&pt=3&fpt=25&dd=221207&pb=PRL (subscription needed) http://www.prescribersletter.com
  8. 8.0 8.1 8.2 Medical Knowledge Self Assessment Program (MKSAP) 16, 17. American College of Physicians, Philadelphia 2012, 2015
  9. Deprecated Reference
  10. Atkinson HC et al Increased Phenylephrine Plasma Levels with Administration of Acetaminophen. N Engl J Med 2014; 370:1171-1172March 20, 2014 <PubMed> PMID: https://www.ncbi.nlm.nih.gov/pubmed/24645960 <Internet> http://www.nejm.org/doi/full/10.1056/NEJMc1313942
  11. 11.0 11.1 Therapeutics Letter #108. Therapeutics Initiative Drugs to Avoid. http://www.ti.ubc.ca/2018/01/04/108-drugs-avoid/
  12. 12.0 12.1 DePeau-Wilson M FDA Plans to Ban Popular Cold Med. Data review shows that oral phenylephrine is not effective as a decongestant, agency says. MedPage Today November 7, 2024 https://www.medpagetoday.com/publichealthpolicy/fdageneral/112779

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