Hello
Omega 3 fatty acid is used in the following indication.
1 Hypertriglyceridaemia .
2 Secondary prophylaxis of
myocardial infarction .
Available as containing eicosapentaenoic acid 17 %,
docosahexaenoic acid 11.5%,
Doses 5 gm twice in day
Other preparation also available as 46% eicosapentanoic acid , 38% docosahexaenoic acid 2-4 gm daily .
So you only mentioned the name of omega 3 fatty acid .
Which preparation you are taking , is not clear , so adjust dose according to these preparation.
As you mentioned that you want to take these drugs , yes , you can use for leg pains.
But special precaution to be taken in few patients as asthmatic , hepatic impairment , ehmorrhagic disorder.
Side effects are also G I disturbance ,
acne &
eczema .
But the best way is to consult your physician and get his opinion.
Good luck.