You should not take Activa Plus Tablet during the last 3 months of pregnancy as it may cause harmful effects on your baby. Use of Activa Plus Tablet can also lead to reduced labor (premature delivery). Hence, it is advised to avoid using Activa Plus Tablet during the first 6 months of pregnancy also. In some cases, Activa Plus Tablet may be prescribed in pregnant women only if the benefits outweigh the risks involved with its use in pregnant women. If not sure, consult your doctor regarding its use.