How would you instruct a patient to take the following effervescent granulation?

Aspirin	5.2 g
Sodium Bicarbonate	14.3 g
Tartaric Acid	7.8 g
Citric Acid Monohydrate	5.2 g

Sig: 1 tsp t.i.d.prn pain

Take one teaspoon three times a day as needed.
Take one teaspoonful three times a day as needed for pain.
Take one teaspoonful with water three times a day as needed for pain.
Dissolve one teaspoonful in water and take three times a day as needed for pain.