How to administer Zantac to baby?

i ahve a 3 month old who has been on zantac since she was 2 weeks old. i tried putting it into her mouth, they say even though they spit it out, as soon as it touches the gums it works but i think thats bull ****. So what i started to do and which was okayed by the dr, i give it to her at her first bottle of the day at 8am and her last bottle at night at 9am. What i do is i make a 2 oz bottle with the zantac cuz she has to drink the entire thing for it to work, i give her that then after she drinks that, i chase it up with the rest of her other 6 oz bottle. Its important that i give it to her in a 2oz only b ecause in order for it to work mixed with formula, she has to drink the entire bottle. once she is done that, i give her the remains of the bottle i took the 2oz from cuz at least if she doesnt finish that one, i know she finished the 2oz with the zantac in it. it has been working for me for 2 months now. I do the same thing at night. Good luck,.