The generic name of Euthyrox is Levothyroxine Sodium Tablets. You can take Levothyroxine Sodium Tablet for pregnancy preparation, provided you take it on the advice of your doctor if your condition requires it. Levothyroxine Sodium Tablet is mainly used for the treatment of hypothyroidism and to control thyroid function to normal levels. If hypothyroidism occurs during the preparation for pregnancy, Levothyroxine Sodium Tablet can be taken under the supervision of a doctor. Side effects such as palpitations, arrhythmia, headache, vomiting, tremor, insomnia, and diarrhea may occur with Levothyroxine Sodium Tablet. It is contraindicated in people suffering from non-hypothyroid heart failure, tachyarrhythmia and recent myocardial infarction, and is contraindicated in people who are allergic to this drug. Levothyroxine Sodium Tablets should be used under medical supervision and should not be taken by oneself.