Details of Drug Interaction

Details of Drug-Drug Interaction

 Drug General Information (ID: DDIONKF68M)
  Drug Name Pentoxifylline Drug Info Guanfacine Drug Info
  Drug Type Small molecule Small molecule
  Therapeutic Class Vasodilator Agents Antiadrenergic Agents
  Structure

 Mechanism of Pentoxifylline-Guanfacine Interaction (Severity Level: Moderate)
     Additive hypotensive effects Click to Show/Hide Mechanism Graph
Could Not Find 2D Structure
      Drug Name Pentoxifylline Guanfacine
      Mechanism 1 Antihypertensive agent Antihypertensive agent
Alpha-2 adrenergic receptor  Agonist
      Key Mechanism Factor 1
Factor Name Adrenergic receptor alpha-2 Structure Sequence
Protein Family G-protein coupled receptor 1 family
Protein Function
Alpha-2 adrenergic receptors mediate the catecholamine-induced inhibition of adenylate cyclase through the action of G proteins. The rank order of potency for agonists of this receptor is oxymetazoline > clonidine > epinephrine > norepinephrine > phenylephrine > dopamine > p-synephrine > p-tyramine > serotonin = p-octopamine. For antagonists, the rank order is yohimbine > phentolamine = mianserine > chlorpromazine = spiperone = prazosin > propanolol > alprenolol = pindolol.
    Click to Show/Hide
      Mechanism Description
  • Additive hypotensive effects by the combination of Pentoxifylline and Guanfacine 
      Mechanism 2 Hypotensive effects Antihypertensive agent
Alpha-2 adrenergic receptor  Agonist
      Key Mechanism Factor 2
Factor Name Adrenergic receptor alpha-2 Structure Sequence
Protein Family G-protein coupled receptor 1 family
Protein Function
Alpha-2 adrenergic receptors mediate the catecholamine-induced inhibition of adenylate cyclase through the action of G proteins. The rank order of potency for agonists of this receptor is oxymetazoline > clonidine > epinephrine > norepinephrine > phenylephrine > dopamine > p-synephrine > p-tyramine > serotonin = p-octopamine. For antagonists, the rank order is yohimbine > phentolamine = mianserine > chlorpromazine = spiperone = prazosin > propanolol > alprenolol = pindolol.
    Click to Show/Hide
      Mechanism Description
  • Additive hypotensive effects by the combination of Pentoxifylline and Guanfacine 

Recommended Action
      Management Caution is advised if pentoxifylline is used in combination with hypotensive agents. Periodic systemic blood pressure monitoring is recommended.

References
1 Product Information. Trental (pentoxifylline). Hoechst Marion-Roussel Inc, Kansas City, MO.