Details of Drug-Drug Interaction
| Drug General Information (ID: DDI94WQLJV) | |||||||||
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| Drug Name | Guanfacine | Drug Info | Guanethidine | Drug Info | |||||
| Drug Type | Small molecule | Small molecule | |||||||
| Therapeutic Class | Antiadrenergic Agents | Antihypertensive Agents | |||||||
| Structure | |||||||||
| Mechanism of Guanfacine-Guanethidine Interaction (Severity Level: Moderate) | |||||||||
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| Additive hypotensive effects Click to Show/Hide Mechanism Graph | |||||||||
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| Drug Name | Guanfacine | Guanethidine | |||||||
| Mechanism |
Antihypertensive agent Alpha-2 adrenergic receptor Agonist |
Antihypertensive agent Noradrenaline transporter Inducer |
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| 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.
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| Key Mechanism Factor 2 | |||||||||
| Factor Name | Norepinephrine transporter |
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Structure
Sequence
MLLARMNPQVQPENNGADTGPEQPLRARKTAELLVVKERNGVQCLLAPRDGDAQPRETWGKKIDFLLSVVGFAVDLANVWRFPYLCYKNGGGAFLIPYTLFLIIAGMPLFYMELALGQYNREGAATVWKICPFFKGVGYAVILIALYVGFYYNVIIAWSLYYLFSSFTLNLPWTDCGHTWNSPNCTDPKLLNGSVLGNHTKYSKYKFTPAAEFYERGVLHLHESSGIHDIGLPQWQLLLCLMVVVIVLYFSLWKGVKTSGKVVWITATLPYFVLFVLLVHGVTLPGASNGINAYLHIDFYRLKEATVWIDAATQIFFSLGAGFGVLIAFASYNKFDNNCYRDALLTSSINCITSFVSGFAIFSILGYMAHEHKVNIEDVATEGAGLVFILYPEAISTLSGSTFWAVVFFVMLLALGLDSSMGGMEAVITGLADDFQVLKRHRKLFTFGVTFSTFLLALFCITKGGIYVLTLLDTFAAGTSILFAVLMEAIGVSWFYGVDRFSNDIQQMMGFRPGLYWRLCWKFVSPAFLLFVVVVSIINFKPLTYDDYIFPPWANWVGWGIALSSMVLVPIYVIYKFLSTQGSLWERLAYGITPENEHHLVAQRDIRQFQLQHWLAI
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| Gene Name | SLC6A2 | ||||||||
| Uniprot ID | SC6A2_HUMAN | ||||||||
| KEGG Pathway | hsa:6530 | ||||||||
| Protein Family | Sodium:neurotransmitter symporter (SNF) (TC 2.A.22) family | ||||||||
| Protein Function |
Amine transporter. Terminates the action of noradrenaline by its high affinity sodium-dependent reuptake into presynaptic terminals.
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| Mechanism Description |
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| Recommended Action | |||||||||
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| Management | Caution is advised during coadministration of these agents. Dosage adjustments may be required and hemodynamic responses should be monitored during concomitant therapy. Patients should be advised to avoid rising abruptly from a sitting or recumbent position and to notify their doctor if they experience dizziness, lightheadedness, syncope, orthostasis, or tachycardia. Patients should also avoid driving or operating hazardous machinery until they know how the medications affect them. | ||||||||