Being aware of precautions and warnings with diclofenac sodium before taking it can help ensure a safe treatment process. The drug has been reported to cause heart attack or stroke, so the smallest effective dose should be taken for the shortest period of time. Precautions and warnings with diclofenac sodium also extend to people with known high blood pressure or heart failure, since the medication may make either condition worse.
Stomach ulcers, stomach bleeding, or a history of either condition
Any allergies to medicines, including aspirin or other NSAIDs (nonsteroidal anti-inflammatory drugs).
Let your healthcare provider know if you:
Are pregnant or thinking about becoming pregnant
Are breastfeeding
Drink alcohol frequently
Smoke
Are having or have recently had heart surgery.
Also, tell your healthcare provider about all the medicines you take, including prescription and non-prescription medicines, vitamins, and herbal supplements.