Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Someone evaluated in an emergency department may be asked to have repeat blood tests to confirm that sodium, potassium, bicarbonate, and kidney function have returned to an acceptable range.
Severe abdominal pain, trouble breathing, fainting, seizures, or loss of consciousness require emergency help.
And for anyone, someone who:
After discharge, seek prompt medical advice for returning vomiting, worsening weakness, increasing thirst, new swelling, palpitations, or confusion.
Follow-up needs vary.
Keep this follow-up even if symptoms have improved, because blood chemistry changes may persist after a person feels better.
And for anyone, someone who:
The article also says
If baking soda was being used regularly for heartburn or indigestion, discuss the symptoms with a healthcare professional rather than restarting it on your own.
Frequent heartburn may need evaluation, and other approaches may be safer depending on the person's health and medicines.
Review all antacids, supplements, and over-the-counter products with a pharmacist or clinician.
Labels may list sodium bicarbonate even when the product is not called baking soda.
People who need to limit sodium should pay particular attention to this ingredient.
Store baking soda and medicines where children cannot reach them.
Keep products in their original containers so that the label and ingredients remain available if an exposure occurs.
Every sign above is quoted from the sofidex article on Baking soda overdose. If you are not sure, err upward — it is always reasonable to be checked.