Hi   he needs to be examined.  Snoring has many causes.  So the cause needs to be identified and treated.

Hello dear.. With allopathic medication he can get relief..

What’s his weight? If he is overweight, ask him to reduce weight. Quit all forms of addiction, especially alcohol and smoking. For temporary relief, you can try elevate his head end by using an extra pillow. You may also try and use a body pillow. Ask him to lie on his side while sleeping instead of lying on his back.