I have only been taking it for two days but I feel absolutely awful ! It has upset my stomach so badly I have been up all night. My stomach is grumbling like a drain and I feel so sick. I always have difficulties taking tablets but have never had an upset like this before. Perhaps its partly stress as we are going away but there is no way I am going to manage these tablets on holiday. I have the Slow release tablets and it is only 500 mg so I thought I wouldn't have any problems with them. I guess they suit some people and not others. The advice I have been given is try and work through it and eat some ginger biscuits but I might as well not go on holiday if I feel this bad. I feel very depressed today.