Brief Answer: needs evaluation and change in medicine Detailed Answer: Hi! Some patients become dependent on sedatives to induce sleep and later on need more higher doses for inducing sleep. Lot of other medical problems also interfere with sleep like electrolyte imbalance, high blood sugar, high creatinine, sepsis, thyroid disorders, etc. I would urge him to consult his treating doctor who can evaluate him and exclude associated conditions. If all other parameters are fine, other sedative hypnotics can be added for better results. Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries. Wishing you good health.