If inositol is taken orally, then it is safe for most of the adults, but still, it can cause mild to moderate symptoms related to tiredness, lethargy, nausea, headache, stomach pain, and dizziness.
In oral consumption, inositol is safe for children between the ages of 5 to 12 years and for Infants suffering from acute respiratory distress syndrome (ARDS) for up to 10 days. In cases with supplementation for more than 10 days in these infants, inositol supplementation can be unsafe.
In women going through pregnancy, oral consumption of inositol is safe while it is advised for lactating women not to consume inositol in any way to stay at the safer side.
In the treatment of diabetes, patients may suffer from low blood sugar levels. Therefore, inositol consumption should be monitored regularly during treatment.
Other Possible Side Effects:
Cold may cause pain in the fingers and toes.
In rare occasions Liver damage (similar to other niacin products).
For some it may cause burping.