Corex is a cough syrup with codeine this acts on a region called medulla in your brain. The breathing sound at night can be due to you abusing Corex. Also nausea, muscle aches, constipation are all from Corex intake or withdrawal when you don't take it.With regard to foul smell, pain in your liver, kidney alcohol affects your liver and gallbladder so fatty stool is possible.I recommend that you go for a medical check up to your doctor and see an addiction psychiatrist to stop alcohol and Corex abuse. This is done by counselling and medications. Naltrexone is one medication for both abuse treatment. But you cannot take Corex while on Naltrexone as it will worsen your withdrawal symptoms.Discuss the treatment options with your doctor. Stopping Corex on your own will make you sick for 3 days with flu like symptoms, watery eyes and nose, muscle and joint aches, hot flashes, goose pimples, diarrhoea, nausea, cramps and so on but after 3 days you will be fine. But alcohol stopping on your own is risky and dangerous as you might have a seizure. So please get medical aide as soon as possible.If your liver is bad Naltrexone is not given. While you are arranging to see your doctor start immediately attending Alcohol Anonymous group at least 1-2 times a week.