Pain
"My Husband was given this medication due to suffering long term knee pain. He took it for approx 6 weeks max and had to stop. 
The most awful side effects you can imagine for the whole time blighted him. Maybe he was just unlucky and this med didn&#039;t suit him but it&#039;s Cons certainly outweighed its Pros in his case. 
Weight gain
Excess gas
Dizzyness
Nausea 
Vomiting 
Diarrhoea 
Headaches......
Not a good one for him at all. 

UK  Based."