Shake well before each use (30 seconds)**. Give 6 drops per day on a spoon or mixed with (lukewarm) milk or other food. Stick to the recommended dosage. ** The viable bacteria (Bifidobacterium lactis) in this product settle at the bottom. Therefore, it is important to shake well before each use (30 seconds) to mix the powder as much as possible with the oil. Some residue can remain in the dropper, causing it to not drip properly. Shaking for 30 seconds helps to release the contents again. When using antibiotics, it is recommended to wait at least 2 hours between taking Microbiol Child and the antibiotic.