Details of Drug-Drug Interaction
| Drug General Information (ID: DDIRO81VPL) | |||||||||
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| Drug Name | Pentoxifylline | Drug Info | Lofexidine | Drug Info | |||||
| Drug Type | Small molecule | Small molecule | |||||||
| Therapeutic Class | Vasodilator Agents | Antihypertensive Agents | |||||||
| Structure | |||||||||
| Mechanism of Pentoxifylline-Lofexidine Interaction (Severity Level: Moderate) | |||||||||
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| Additive hypotensive effects Click to Show/Hide Mechanism Graph | |||||||||
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| Drug Name | Pentoxifylline | Lofexidine | |||||||
| Mechanism 1 | Antihypertensive agent |
Hypotensive effects Alpha-2 adrenergic receptor Agonist |
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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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| Mechanism Description |
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| Mechanism 2 | Hypotensive effects |
Hypotensive effects Alpha-2 adrenergic receptor Agonist |
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| 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.
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| Mechanism Description |
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| Recommended Action | |||||||||
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| Management | Caution is advised if pentoxifylline is used in combination with hypotensive agents. Periodic systemic blood pressure monitoring is recommended. | ||||||||
| References | |||||||||||||||||||
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| 1 | Product Information. Trental (pentoxifylline). Hoechst Marion-Roussel Inc, Kansas City, MO. | ||||||||||||||||||