Drug General Information (ID: DDIJUP4S8K)
Drug Name			Acetylsalicylic acid		Drug Info		Dalteparin		Drug Info
Drug Type		Small molecule				Small molecule
Therapeutic Class		Analgesics				Anticoagulants
Structure

Mechanism of Acetylsalicylic acid-Dalteparin Interaction (Severity Level: Major)
Increased risk of bleeding Click to Show/Hide Mechanism Graph
Drug Name		Acetylsalicylic acid				Dalteparin
Mechanism		Risk of bleeding Antiplatelet				Risk of bleeding Anticoagulant
Key Mechanism Factor 1
		Factor Name		Bleeding
		Factor Description		Patients may be at risk for bleeding when the outcome of a disease or disease treatment confounds the standard mechanisms for maintaining hemostasis. Signs or symptoms of abnormal bleeding include: bleeding that takes a long time to stop (including nosebleeds, bleeding gums, bleeding from cuts and abrasions, and menstrual bleeding); severe unexplained bruising, or bruising that becomes larger; blood in the urine or stool, etc.
Mechanism Description		Increased risk of bleeding by the combination of Acetylsalicylic acid and Dalteparin

Recommended Action
Management		Products containing NSAIDs, especially if given chronically and in high dosages, should preferably be avoided in patients receiving LMWHs or heparinoids. Close clinical and laboratory observation for bleeding complications is recommended if concurrent therapy is necessary. In patients undergoing neuraxial intervention, coadministration of these agents should be approached with caution and only after thorough assessment of risks and benefits.

References
1	Product Information. Lovenox (enoxaparin). Rhone-Poulenc Rorer, Collegeville, PA.
2	Product Information. Orgaran (danaparoid). Organon, West Orange, NJ.
3	Weale AE, Warwick DJ, Durant N, Prothero D "Is there a clinical interaction between low molecular weight heparin and non-steroidal analgesics after total hip replacement?" Ann R Coll Surg Engl 77 (1995): 35-7. [PMID: 7717643]