sodium chloride is table salt. If you can stand to drink it, a half tsp (teaspoon) in a glass of water is often what is recommended. Or, half that if it is easier for you to get down. But really, unless prescribed a certain dose by a qualified person, and unless that prescription comes in a tablet form (issued specifically to address your needs), you should be able to take table salt in water, or just add a few more shakes to your food.
Note that this is not qualified advice, except that I'm NOT qualified. I would ask you to consult a physician, if it's a problem with your metabolism, and ask that person if adding a bit more salt to food would help. If blood pressure rises, and you can't afford that, then you'll have to listen to a doctor advise differently.

I have a prescription of it, but it's the exact same thing as sold over the counter. I take 1gm twice a day. I just swallow them at the same time as my other meds, though you do taste them a bit.
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