4-Hydroxyamphetamine

"Hydroxyamfetamine" redirects here. For other uses, see Hydroxyamphetamine.

Hydroxyamphetamine
INN: Hydroxyamfetamine
Clinical data
Trade namesParedrine, Paremyd, Pedrolon, Mycadrine, Paredrinex, others
Other names4-Hydroxyamphetamine; 4-HA; Hydroxyamfetamine; Oxamphetamine; Norpholedrine; para-Hydroxyamphetamine; α-Methyltyramine; Methyltyramine, Hydroxyamphetamine (USAN US)
Routes of
administration		Eye drops
ATC code
  • None
Legal status
Legal status
  • In general: ℞ (Prescription only)
Identifiers
  • 4-(2-aminopropyl)phenol
CAS Number
PubChem CID
ChemSpider
UNII
ChEMBL
CompTox Dashboard (EPA)
ECHA InfoCard100.002.866 Edit this at Wikidata
Chemical and physical data
FormulaC9H13NO
Molar mass151.209 g·mol−1
3D model (JSmol)
  • NC(C)Cc1ccc(O)cc1
  • InChI=1S/C9H13NO/c1-7(10)6-8-2-4-9(11)5-3-8/h2-5,7,11H,6,10H2,1H3 checkY
  • Key:GIKNHHRFLCDOEU-UHFFFAOYSA-N checkY
  (verify)

Hydroxyamphetamine, also known as 4-hydroxyamphetamine or norpholedrine and sold under the brand names Paredrine and Paremyd among others, is a sympathomimetic medication used in eye drops to dilate the pupil for eye examinations.[1][2][3][4]

Hydroxyamfetamine acts as a norepinephrine releasing agent and hence is an indirectly acting sympathomimetic.[5][6] It is a substituted phenethylamine and amphetamine.[4]

Hydroxyamphetamine appeared to remain marketed only in the Czech Republic as of 2004.[3]

Medical uses

Hydroxyamphetamine is used in eye drops to dilate the pupil (a process called mydriasis) so that the back of the eye can be examined. This is a diagnostic test for Horner's syndrome. Patients with Horner's syndrome exhibit anisocoria brought about by lesions on the nerves that connect to the nasociliary branch of the ophthalmic nerve.[7] Application of hydroxyamphetamine to the eye can indicate whether the lesion is preganglionic or postganglionic based on the pupil's response. If the pupil dilates, the lesion is preganglionic. If the pupil does not dilate, the lesion is postganglionic.[7]

Hydroxyamphetamine has some limitations to its use as a diagnostic tool. If it is intended as an immediate follow up to another mydriatic drug (cocaine or apraclonidine), then the patient must wait anywhere from a day to a week before hydroxyamphetamine can be administered.[8][5] It also has the tendency to falsely localize lesions. False localization can arise in cases of acute onset; in cases where a postganglionic lesion is present, but the nerve still responds to residual norepinephrine; or in cases in which unrelated nerve damage masks the presence of a preganglionic lesion.[7][8]

Available forms

Hydroxyamphetamine is a component of two controlled (prescription only), name-brand ophthalmic mydriatics: Paredrine and Paremyd. Paredrine consists of a 1% solution of hydroxyamphetamine hydrobromide[9]: 543  while Paremyd consists of a combination of 1% hydroxyamphetamine hydrobromide and 0.25% tropicamide.[10]

Pharmacology

Pharmacodynamics

Like amphetamine, hydroxyamphetamine is an agonist of human TAAR1.[11] Hydroxyamphetamine acts as an indirect sympathomimetic and induces the release of norepinephrine which leads to mydriasis (pupil dilation).[5][6]

It additionally decreases metabolism of serotonin and certain other monoamines by inhibiting the activity of monoamine oxidases (MAOs), particularly type A (MAO-A).[citation needed] The inhibition of MAO-A prevents metabolism of serotonin and catecholamines in the presynaptic terminal, and thus increases the amount of neurotransmitters available for release into the synaptic cleft.[12]

Pharmacokinetics

Hydroxyamphetamine is a major metabolite of amphetamine and a minor metabolite of methamphetamine. In humans, amphetamine is metabolized to hydroxyamphetamine by CYP2D6, which is a member of the cytochrome P450 superfamily and is found in the liver.[13][14] 4-Hydroxyamphetamine is then metabolized by dopamine β-hydroxylase into 4-hydroxynorephedrine or eliminated in the urine.[6]

Metabolic pathways of amphetamine in humans[sources 1]
Graphic of several routes of amphetamine metabolism
Para-
Hydroxylation
Para-
Hydroxylation
Para-
Hydroxylation
unidentified
Beta-
Hydroxylation
Beta-
Hydroxylation
Oxidative
Deamination
Oxidation
unidentified
Glycine
Conjugation
The image above contains clickable links
In humans, 4-hydroxyamphetamine is formed from CYP2D6 metabolism of amphetamine; 4-hydroxyamphetamine may subsequently be metabolized by dopamine β-hydroxylase into 4-hydroxynorephedrine.


Chemistry

Hydroxyamphetamine, also known as 4-hydroxy-α-methylphenethylamine, 4-hydroxyamphetamine, or α-methyltyramine, is a substituted phenethylamine and amphetamine derivative. It is the 4-hydroxylated analogue of amphetamine, the N-demethylated analogue of pholedrine (4-hydroxy-N-methylamphetamine), and the α-methylated analogue of tyramine (4-hydroxyphenethylamine). Other analogues include α-methyldopamine, corbadrine (levonordefrin; α-methylnorepinephrine), and dioxifedrine (α-methylepinephrine).

It has a predicted log P of 0.58 to 1.4.[26][4][27]

Hydroxyamphetamine is used pharmaceutically as the hydrobromide salt.[1]

History

Hydroxyamphetamine was first synthesized by 1910.[1]

In the 1990s, the trade name rights, patents, and new drug applications (NDAs) for Paredrine and Paremyd were exchanged among a few different manufacturers after a shortage of the raw material required for their production, which caused both drugs to be indefinitely removed from the market.[28] Around 1997, Akorn, Inc., obtained the rights to both Paredrine and Paremyd,[29] and in 2002, the company reintroduced Paremyd to the market as a fast acting ophthalmic mydriatic agent.[10][30][31]

In 2004, hydroxyamphetamine appeared to remain marketed only in the Czech Republic.[3]

Society and culture

Names

Hydroxyamphetamine is the generic name of the drug and its BANTooltip British Approved Name and DCFTooltip Dénomination Commune Française, while hydroxyamfetamine is its INNTooltip International Nonproprietary Name.[1][2][3] In the case of the hydrobromide salt, its generic name is hydroxyamphetamine hydrobromide and this is its USANTooltip United States Adopted Name.[1][2][3] It is also known by synonyms including methyltyramine, norpholedrine, and oxamphetamine.[1][2][3][26] The drug is sold under brand names including Paredrine, Paredrinex, Paremyd, Pedrolon, and Mycadrine.[1][3]

Other drugs

4-Hydroxyamphetamine is also a metabolite of amphetamine and certain other amphetamines.[2]

Notes

  1. ^ 4-Hydroxyamphetamine has been shown to be metabolized into 4-hydroxynorephedrine by dopamine beta-hydroxylase (DBH) in vitro and it is presumed to be metabolized similarly in vivo.[16][21] Evidence from studies that measured the effect of serum DBH concentrations on 4-hydroxyamphetamine metabolism in humans suggests that a different enzyme may mediate the conversion of 4-hydroxyamphetamine to 4-hydroxynorephedrine;[21][23] however, other evidence from animal studies suggests that this reaction is catalyzed by DBH in synaptic vesicles within noradrenergic neurons in the brain.[24][25]

Reference notes

  1. ^ [15][16][17][18][19][20][21][22]

References

  1. ^ a b c d e f g Elks J (2014). The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. Springer US. p. 74. ISBN 978-1-4757-2085-3. Retrieved August 30, 2024.
  2. ^ a b c d e Morton IK, Hall JM (2012). Concise Dictionary of Pharmacological Agents: Properties and Synonyms. Springer Netherlands. p. 90. ISBN 978-94-011-4439-1. Retrieved August 30, 2024.
  3. ^ a b c d e f g Schweizerischer Apotheker-Verein (2004). Index Nominum: International Drug Directory. Index Nominum: International Drug Directory. Medpharm Scientific Publishers. p. 609. ISBN 978-3-88763-101-7. Retrieved August 30, 2024.
  4. ^ a b c "Hydroxyamphetamine: Uses, Interactions, Mechanism of Action". DrugBank Online. January 30, 1992. Retrieved August 30, 2024.
  5. ^ a b c Lepore FE (1985). "Diagnostic pharmacology of the pupil". Clinical Neuropharmacology. 8 (1): 27–37. doi:10.1097/00002826-198503000-00003. PMID 3884149.
  6. ^ a b c Cho AK, Wright J (February 1978). "Pathways of metabolism of amphetamine and related compounds". Life Sciences. 22 (5): 363–372. doi:10.1016/0024-3205(78)90282-5. PMID 347211.
  7. ^ a b c Walton KA, Buono LM (December 2003). "Horner syndrome". Current Opinion in Ophthalmology. 14 (6): 357–363. doi:10.1097/00055735-200312000-00007. PMID 14615640. S2CID 11262166.
  8. ^ a b Davagnanam I, Fraser CL, Miszkiel K, Daniel CS, Plant GT (March 2013). "Adult Horner's syndrome: a combined clinical, pharmacological, and imaging algorithm". Eye. 27 (3): 291–298. doi:10.1038/eye.2012.281. PMC 3597883. PMID 23370415.
  9. ^ Slamovits TL, Glaser JS (1999). "The Pupils and Accommodation.". In Glaser JS (ed.). Neuro-ophthalmology. Philadelphia, PA: Lippincott, Williams, & Wilkins. ISBN 978-0781717298.
  10. ^ a b "Hydroxyamphetamine Hydrobromide; Tropicamide". Orange Book: Approved Drug Products with Therapeutic Equivalence Evaluations. Archived from the original on March 4, 2016.
  11. ^ Lewin AH, Miller GM, Gilmour B (December 2011). "Trace amine-associated receptor 1 is a stereoselective binding site for compounds in the amphetamine class". Bioorganic & Medicinal Chemistry. 19 (23): 7044–7048. doi:10.1016/j.bmc.2011.10.007. PMC 3236098. PMID 22037049.
  12. ^ Nakagawasai O, Arai Y, Satoh SE, Satoh N, Neda M, Hozumi M, et al. (January 2004). "Monoamine oxidase and head-twitch response in mice. Mechanisms of alpha-methylated substrate derivatives". Neurotoxicology. 25 (1–2): 223–232. doi:10.1016/S0161-813X(03)00101-3. PMID 14697897.
  13. ^ Markowitz JS, Patrick KS (2001). "Pharmacokinetic and pharmacodynamic drug interactions in the treatment of attention-deficit hyperactivity disorder". Clinical Pharmacokinetics. 40 (10): 753–772. doi:10.2165/00003088-200140100-00004. PMID 11707061. S2CID 20884365.
  14. ^ Haefely W, Bartholini G, Pletscher A (1976). "Monoaminergic drugs: general pharmacology". Pharmacology & Therapeutics B. 2 (1): 185–218. doi:10.1016/0306-039x(76)90030-1. PMID 817330.
  15. ^ "Adderall XR Prescribing Information" (PDF). United States Food and Drug Administration. Shire US Inc. December 2013. pp. 12–13. Retrieved December 30, 2013.
  16. ^ a b Glennon RA (2013). "Phenylisopropylamine stimulants: amphetamine-related agents". In Lemke TL, Williams DA, Roche VF, Zito W (eds.). Foye's principles of medicinal chemistry (7th ed.). Philadelphia, US: Wolters Kluwer Health/Lippincott Williams & Wilkins. pp. 646–648. ISBN 9781609133450. The simplest unsubstituted phenylisopropylamine, 1-phenyl-2-aminopropane, or amphetamine, serves as a common structural template for hallucinogens and psychostimulants. Amphetamine produces central stimulant, anorectic, and sympathomimetic actions, and it is the prototype member of this class (39). ... The phase 1 metabolism of amphetamine analogs is catalyzed by two systems: cytochrome P450 and flavin monooxygenase. ... Amphetamine can also undergo aromatic hydroxylation to p-hydroxyamphetamine. ... Subsequent oxidation at the benzylic position by DA β-hydroxylase affords p-hydroxynorephedrine. Alternatively, direct oxidation of amphetamine by DA β-hydroxylase can afford norephedrine.
  17. ^ Taylor KB (January 1974). "Dopamine-beta-hydroxylase. Stereochemical course of the reaction" (PDF). Journal of Biological Chemistry. 249 (2): 454–458. doi:10.1016/S0021-9258(19)43051-2. PMID 4809526. Retrieved November 6, 2014. Dopamine-β-hydroxylase catalyzed the removal of the pro-R hydrogen atom and the production of 1-norephedrine, (2S,1R)-2-amino-1-hydroxyl-1-phenylpropane, from d-amphetamine.
  18. ^ Krueger SK, Williams DE (June 2005). "Mammalian flavin-containing monooxygenases: structure/function, genetic polymorphisms and role in drug metabolism". Pharmacology & Therapeutics. 106 (3): 357–387. doi:10.1016/j.pharmthera.2005.01.001. PMC 1828602. PMID 15922018.
    Table 5: N-containing drugs and xenobiotics oxygenated by FMO
  19. ^ Cashman JR, Xiong YN, Xu L, Janowsky A (March 1999). "N-oxygenation of amphetamine and methamphetamine by the human flavin-containing monooxygenase (form 3): role in bioactivation and detoxication". Journal of Pharmacology and Experimental Therapeutics. 288 (3): 1251–1260. PMID 10027866.
  20. ^ Santagati NA, Ferrara G, Marrazzo A, Ronsisvalle G (September 2002). "Simultaneous determination of amphetamine and one of its metabolites by HPLC with electrochemical detection". Journal of Pharmaceutical and Biomedical Analysis. 30 (2): 247–255. doi:10.1016/S0731-7085(02)00330-8. PMID 12191709.
  21. ^ a b c Sjoerdsma A, von Studnitz W (April 1963). "Dopamine-beta-oxidase activity in man, using hydroxyamphetamine as substrate". British Journal of Pharmacology and Chemotherapy. 20 (2): 278–284. doi:10.1111/j.1476-5381.1963.tb01467.x. PMC 1703637. PMID 13977820. Hydroxyamphetamine was administered orally to five human subjects ... Since conversion of hydroxyamphetamine to hydroxynorephedrine occurs in vitro by the action of dopamine-β-oxidase, a simple method is suggested for measuring the activity of this enzyme and the effect of its inhibitors in man. ... The lack of effect of administration of neomycin to one patient indicates that the hydroxylation occurs in body tissues. ... a major portion of the β-hydroxylation of hydroxyamphetamine occurs in non-adrenal tissue. Unfortunately, at the present time one cannot be completely certain that the hydroxylation of hydroxyamphetamine in vivo is accomplished by the same enzyme which converts dopamine to noradrenaline.
  22. ^ Badenhorst CP, van der Sluis R, Erasmus E, van Dijk AA (September 2013). "Glycine conjugation: importance in metabolism, the role of glycine N-acyltransferase, and factors that influence interindividual variation". Expert Opinion on Drug Metabolism & Toxicology. 9 (9): 1139–1153. doi:10.1517/17425255.2013.796929. PMID 23650932. S2CID 23738007. Figure 1. Glycine conjugation of benzoic acid. The glycine conjugation pathway consists of two steps. First benzoate is ligated to CoASH to form the high-energy benzoyl-CoA thioester. This reaction is catalyzed by the HXM-A and HXM-B medium-chain acid:CoA ligases and requires energy in the form of ATP. ... The benzoyl-CoA is then conjugated to glycine by GLYAT to form hippuric acid, releasing CoASH. In addition to the factors listed in the boxes, the levels of ATP, CoASH, and glycine may influence the overall rate of the glycine conjugation pathway.
  23. ^ Horwitz D, Alexander RW, Lovenberg W, Keiser HR (May 1973). "Human serum dopamine-β-hydroxylase. Relationship to hypertension and sympathetic activity". Circulation Research. 32 (5): 594–599. doi:10.1161/01.RES.32.5.594. PMID 4713201. S2CID 28641000. The biologic significance of the different levels of serum DβH activity was studied in two ways. First, in vivo ability to β-hydroxylate the synthetic substrate hydroxyamphetamine was compared in two subjects with low serum DβH activity and two subjects with average activity. ... In one study, hydroxyamphetamine (Paredrine), a synthetic substrate for DβH, was administered to subjects with either low or average levels of serum DβH activity. The percent of the drug hydroxylated to hydroxynorephedrine was comparable in all subjects (6.5-9.62) (Table 3).
  24. ^ Freeman JJ, Sulser F (December 1974). "Formation of p-hydroxynorephedrine in brain following intraventricular administration of p-hydroxyamphetamine". Neuropharmacology. 13 (12): 1187–1190. doi:10.1016/0028-3908(74)90069-0. PMID 4457764. In species where aromatic hydroxylation of amphetamine is the major metabolic pathway, p-hydroxyamphetamine (POH) and p-hydroxynorephedrine (PHN) may contribute to the pharmacological profile of the parent drug. ... The location of the p-hydroxylation and β-hydroxylation reactions is important in species where aromatic hydroxylation of amphetamine is the predominant pathway of metabolism. Following systemic administration of amphetamine to rats, POH has been found in urine and in plasma.
    The observed lack of a significant accumulation of PHN in brain following the intraventricular administration of (+)-amphetamine and the formation of appreciable amounts of PHN from (+)-POH in brain tissue in vivo supports the view that the aromatic hydroxylation of amphetamine following its systemic administration occurs predominantly in the periphery, and that POH is then transported through the blood-brain barrier, taken up by noradrenergic neurones in brain where (+)-POH is converted in the storage vesicles by dopamine β-hydroxylase to PHN.
  25. ^ Matsuda LA, Hanson GR, Gibb JW (December 1989). "Neurochemical effects of amphetamine metabolites on central dopaminergic and serotonergic systems". Journal of Pharmacology and Experimental Therapeutics. 251 (3): 901–908. PMID 2600821. The metabolism of p-OHA to p-OHNor is well documented and dopamine-β hydroxylase present in noradrenergic neurons could easily convert p-OHA to p-OHNor after intraventricular administration.
  26. ^ a b "4-(2-Aminopropyl)phenol". PubChem. Retrieved August 30, 2024.
  27. ^ "C9H13NO". Hydroxyamphetamine. August 30, 2024. Retrieved August 30, 2024.
  28. ^ "Akorn Acquires Paredrine - Specialty Ophthalmic Diagnostic Product From Pharmics, Inc". Akorn press release. March 24, 1999. Archived from the original on September 16, 2018. Retrieved December 9, 2014.
  29. ^ "Akorn press release".[permanent dead link‍]
  30. ^ "Akorn timeline". Archived from the original on June 26, 2019. Retrieved December 9, 2014.
  31. ^ Lurcott R (December 1, 2002). "Unique Mydriatic Returns: The combination formula fosters patient flow efficiencies". Ophthalmology Management.

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Decorative technique Stucco in the Court of the Lions of the Alhambra (14th century), in Granada, Spain. Arabesques are mixed here with calligraphic motifs and muqarnas sculpting. Stucco decoration in Islamic architecture refers to carved or molded stucco and plaster. The terms stucco and plaster are used almost interchangeably in this context to denote most types of stucco or plaster decoration with slightly varying compositions.[1] This decoration was mainly used to cover walls and ...

 

 

Slovenský Pohár 2020-2021

Slovenský Pohár 2020-2021Slovnaft Cup 2020-2021 Competizione Slovenský Pohár Sport Calcio Edizione 28ª Date dal 25 luglio 2020al 19 maggio 2021 Luogo  Slovacchia Partecipanti 229 Risultati Vincitore Slovan Bratislava(10º titolo) Secondo Žilina Statistiche Incontri disputati 216 Gol segnati 842 (3,9 per incontro) Cronologia della competizione 2019-2020 2021-2022 Manuale La Coppa di Slovacchia 2020-2021, conosciuta anche come Slovnaft Cup per ragioni di sponsorizzazion...