Other less serious side effects such as mild nausea, vomiting, diarrhea or abdominal pain, or yeast or fungal infection may be more likely to occur. (1800petmeds.com)
When cats and plants don't mix, the results can be anything from mild nausea, all the way to kidney failure and death! (cat-lovers-only.com)
With my first 4 pregnancies I used other vitamins and experienced extreme nausea but with the last 4 only mild nausea. (mamanatural.com)