I've been using 10mg of over the counter Pepcid dissolved in distilled water and run through a rinsed coffee filter, as needed during acute cedar sinus attack no more than twice a day. 5mg didn't seem to relieve symptoms of hayfever forme. However after almost a week of taking it am noticing some stomach discomfort, so I haven't taken in a couple days and still feel the discomfort.what dose, brand and frequency of famotidine do you use for this relief?