I just started taking chateal this month. I have two green inert tablets left on my pack, but yesterday & this morning I've noticed that my throat & the area around my collar bone are somewhat in pain. It only happens every now & then, but I get the feeling like I've swallowed a huge vitamin that won't go down, only I'm not even swallowing anything. Sometimes I have difficulty with hot liquids being swallowed too. Could this be a drug interaction? & why would I feel absolutely fine taking this drug till now?