She may not need antibiotics again as of now
She can have 1bowl of curd with lunch everyday, that's the best probiotic or she can have Enterogermina for 7 days
Since she doesn't have any other symptoms, she doesn't need an antacid regularly.
Next Steps
Make her have atleast 3 litres of water every day
smaller size meals at regular intervals,
no fried, fatty or spicy food
if loose motions continue, make sure she has Electral/ Nimbu Pani
She should avoid long gaps between the meals, that will prevent bloating and acidity
Health Tips
Follow up with her doctor if her symptoms continue for long or worsen