Details of Drug-Drug Interaction
| Drug General Information (ID: DDI9DB53FZ) | |||||||||
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| Drug Name | Phentolamine | Drug Info | Pentoxifylline | Drug Info | |||||
| Drug Type | Small molecule | Small molecule | |||||||
| Therapeutic Class | Antihypertensive Agents | Vasodilator Agents | |||||||
| Structure | |||||||||
| Mechanism of Phentolamine-Pentoxifylline Interaction (Severity Level: Moderate) | |||||||||
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| Additive hypotensive effects Click to Show/Hide Mechanism Graph | |||||||||
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| Drug Name | Phentolamine | Pentoxifylline | |||||||
| Mechanism 1 |
Antihypertensive agent Alpha-1 adrenergic receptor Antagonist |
Antihypertensive agent | |||||||
| Key Mechanism Factor 1 | |||||||||
| Factor Name | Adrenergic receptor alpha-1 | Structure Sequence | |||||||
| Protein Family | G-protein coupled receptor 1 family | ||||||||
| Protein Function |
This alpha-adrenergic receptor mediates its action by association with G proteins that activate a phosphatidylinositol-calcium second messenger system. Its effect is mediated by G(q) and G(11) proteins. Nuclear ADRA1A-ADRA1B heterooligomers regulate phenylephrine(PE)-stimulated ERK signaling in cardiac myocytes.
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| Mechanism Description |
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| Mechanism 2 |
Antihypertensive agent Alpha-1 adrenergic receptor Antagonist |
Hypotensive effects | |||||||
| Key Mechanism Factor 2 | |||||||||
| Factor Name | Adrenergic receptor alpha-1 | Structure Sequence | |||||||
| Protein Family | G-protein coupled receptor 1 family | ||||||||
| Protein Function |
This alpha-adrenergic receptor mediates its action by association with G proteins that activate a phosphatidylinositol-calcium second messenger system. Its effect is mediated by G(q) and G(11) proteins. Nuclear ADRA1A-ADRA1B heterooligomers regulate phenylephrine(PE)-stimulated ERK signaling in cardiac myocytes.
Click to Show/Hide
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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. | ||||||||||||||||||