Hard to say:
<a href="http:&#x2F;&#x2F;www.drugs.com&#x2F;dosage&#x2F;ibuprofen.html#Usual_Adult_Dose_for_Headache" rel="nofollow">http:&#x2F;&#x2F;www.drugs.com&#x2F;dosage&#x2F;ibuprofen.html#Usual_Adult_Dose_...</a><p>`Usual Adult Dose for Headache
Study (n=34) - Prevention of Electroconvulsive therapy (ECT)-induced headache:
600 mg orally 90 minutes prior to the initial ECT session`