 Possible side effects include gastrointestinal discomfort, sweating, dizziness, allergic reactions, bleeding, and menstrual irregularities.Some breastfeeding mothers have found, after consuming garlic, that their babies can be slow to feed, and have noted a garlic odor coming from them.If higher-than-recommended doses of garlic are taken with anticoagulant medications, this can lead to a higher risk of bleeding.