Details of Drug Interaction

Details of Drug-Drug Interaction

 Drug General Information (ID: DDI9C61PM2)
  Drug Name Timolol Drug Info Methoxyflurane Drug Info
  Drug Type Small molecule Small molecule
  Therapeutic Class Antiarrhythmic Agents Anesthetics
  Structure

 Mechanism of Timolol-Methoxyflurane Interaction (Severity Level: Moderate)
     Additive hypotensive effects Click to Show/Hide Mechanism Graph
Could Not Find 2D Structure
      Drug Name Timolol Methoxyflurane
      Mechanism 1 Antihypertensive agent
Beta-1 adrenergic receptor  Antagonist 		Antihypertensive agent
      Key Mechanism Factor 1
Factor Name Adrenergic receptor beta-1
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Structure Sequence
MGAGVLVLGASEPGNLSSAAPLPDGAATAARLLVPASPPASLLPPASESPEPLSQQWTAGMGLLMALIVLLIVAGNVLVIVAIAKTPRLQTLTNLFIMSLASADLVMGLLVVPFGATIVVWGRWEYGSFFCELWTSVDVLCVTASIETLCVIALDRYLAITSPFRYQSLLTRARARGLVCTVWAISALVSFLPILMHWWRAESDEARRCYNDPKCCDFVTNRAYAIASSVVSFYVPLCIMAFVYLRVFREAQKQVKKIDSCERRFLGGPARPPSPSPSPVPAPAPPPGPPRPAAAAATAPLANGRAGKRRPSRLVALREQKALKTLGIIMGVFTLCWLPFFLANVVKAFHRELVPDRLFVFFNWLGYANSAFNPIIYCRSPDFRKAFQRLLCCARRAARRRHATHGDRPRASGCLARPGPPPSPGAASDDDDDDVVGATPPARLLEPWAGCNGGAAADSDSSLDEPCRPGFASESKV
Gene Name ADRB1
Uniprot ID ADRB1_HUMAN
KEGG Pathway hsa:153
Protein Family G-protein coupled receptor 1 family
Protein Function
Beta-adrenergic receptors mediate the catecholamine-induced activation of adenylate cyclase through the action of G proteins. This receptor binds epinephrine and norepinephrine with approximately equal affinity. Mediates Ras activation through G(s)-alpha- and cAMP-mediated signaling. Involved in the regulation of sleep/wake behaviors (PubMed:31473062).
    Click to Show/Hide
      Mechanism Description
  • Additive hypotensive effects by the combination of Timolol and Methoxyflurane 
      Mechanism 2 Antihypertensive agent
Beta-1 adrenergic receptor  Antagonist 		Hypotensive effects
      Key Mechanism Factor 2
Factor Name Adrenergic receptor beta-1
×
Structure Sequence
MGAGVLVLGASEPGNLSSAAPLPDGAATAARLLVPASPPASLLPPASESPEPLSQQWTAGMGLLMALIVLLIVAGNVLVIVAIAKTPRLQTLTNLFIMSLASADLVMGLLVVPFGATIVVWGRWEYGSFFCELWTSVDVLCVTASIETLCVIALDRYLAITSPFRYQSLLTRARARGLVCTVWAISALVSFLPILMHWWRAESDEARRCYNDPKCCDFVTNRAYAIASSVVSFYVPLCIMAFVYLRVFREAQKQVKKIDSCERRFLGGPARPPSPSPSPVPAPAPPPGPPRPAAAAATAPLANGRAGKRRPSRLVALREQKALKTLGIIMGVFTLCWLPFFLANVVKAFHRELVPDRLFVFFNWLGYANSAFNPIIYCRSPDFRKAFQRLLCCARRAARRRHATHGDRPRASGCLARPGPPPSPGAASDDDDDDVVGATPPARLLEPWAGCNGGAAADSDSSLDEPCRPGFASESKV
Gene Name ADRB1
Uniprot ID ADRB1_HUMAN
KEGG Pathway hsa:153
Protein Family G-protein coupled receptor 1 family
Protein Function
Beta-adrenergic receptors mediate the catecholamine-induced activation of adenylate cyclase through the action of G proteins. This receptor binds epinephrine and norepinephrine with approximately equal affinity. Mediates Ras activation through G(s)-alpha- and cAMP-mediated signaling. Involved in the regulation of sleep/wake behaviors (PubMed:31473062).
    Click to Show/Hide
      Mechanism Description
  • Additive hypotensive effects by the combination of Timolol and Methoxyflurane 

Recommended Action
      Management It is currently recommended that beta blocker therapy not be routinely withdrawn prior to surgery. However, in general, patients taking beta blockers should not be anaesthetized with methoxyflurane. Instead, an anesthetic with minimal negative inotropic activity may be considered. If methoxyflurane must be used, beta blocker therapy should be withdrawn gradually and generally completed 24 to 48 hours before anesthesia.

References
1 Cerner Multum, Inc. "Australian Product Information.".
2 Hunter JM "Synergism between halothane and labetalol." Anaesthesia 34 (1979): 257-9
3 Product Information. Lopressor (metoprolol). Novartis Pharmaceuticals, East Hanover, NJ.