Drug General Information (ID: DDIHPLS7J2)
  Drug Name Propranolol Drug Info Iloprost Drug Info
  Drug Type Small molecule Small molecule
  Therapeutic Class Antianxiety Agents Antihypertensive Agents
  Structure

 Mechanism of Propranolol-Iloprost Interaction (Severity Level: Moderate)
     Additive hypotensive effects Click to Show/Hide Mechanism Graph
Could Not Find 2D Structure
      Drug Name Propranolol Iloprost
      Mechanism Antihypertensive agent
Beta-1 adrenergic receptor  Antagonist
Antihypertensive agent
Prostaglandin E2 receptor  Agonist
      Key Mechanism Factor 1
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
      Key Mechanism Factor 2
Factor Name Prostaglandin E2 receptor EP2
×
Structure Sequence
MGNASNDSQSEDCETRQWLPPGESPAISSVMFSAGVLGNLIALALLARRWRGDVGCSAGRRSSLSLFHVLVTELVFTDLLGTCLISPVVLASYARNQTLVALAPESRACTYFAFAMTFFSLATMLMLFAMALERYLSIGHPYFYQRRVSRSGGLAVLPVIYAVSLLFCSLPLLDYGQYVQYCPGTWCFIRHGRTAYLQLYATLLLLLIVSVLACNFSVILNLIRMHRRSRRSRCGPSLGSGRGGPGARRRGERVSMAEETDHLILLAIMTITFAVCSLPFTIFAYMNETSSRKEKWDLQALRFLSINSIIDPWVFAILRPPVLRLMRSVLCCRISLRTQDATQTSCSTQSDASKQADL
Gene Name PTGER2
Uniprot ID PE2R2_HUMAN
KEGG Pathway hsa:5732
Protein Family G-protein coupled receptor 1 family
Protein Function
Receptor for prostaglandin E2 (PGE2). The activity of this receptor is mediated by G(s) proteins that stimulate adenylate cyclase. The subsequent raise in intracellular cAMP is responsible for the relaxing effect of this receptor on smooth muscle.
    Click to Show/Hide
      Mechanism Description
  • Additive hypotensive effects by the combination of Propranolol and Iloprost 

Recommended Action
      Management While therapies that target the prostacyclin pathway have been used in combination with diuretics, antihypertensives, or other vasodilators in the management of pulmonary arterial hypertension, caution is recommended if they must be administered concurrently. If these drugs are used together, it is generally recommended that blood pressure be measured more frequently until a stable blood pressure pattern is observed. 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, orthostatic hypotension, or tachycardia.

References
1 Cerner Multum, Inc. "UK Summary of Product Characteristics.".
2 Product Information. Flolan (epoprostenol). Glaxo Wellcome, Research Triangle Park, NC.
3 Product Information. Remodulin (treprostinil). United Therapeutics Corp, Silver Spring, MD.