The 3 tablets you got in the pack are different kinds of antibiotics used to treat your condition. They need to be taken on the same day. You may take them at one go, but its better to take the Azithromycin
tablet 1 hour before or 1 hour after a meal. Rest of the tablets can be taken just after a meal. You might space out rest of the tablets at half an hour intervals if you have a tendency to gastritis/acidity.
Wish you a speedy recovery.