The symptoms you reflect are suspected of anxiety, which was diagnosed by the doctor before.
Anxiety can only be recovered by drug treatment, and psychological intervention should be carried out at the same time in severe cases. If you were looking for a medicine prescribed by a doctor in a big hospital, there should be no problem, but you must take it according to the doctor's instructions, because western medicine must have some side effects, but if you use it under the guidance of a doctor, there will be no big problem. The reason why your husband took medicine and slept well. That's why you must follow the doctor's instructions. The reason why your husband doesn't take medicine on time will lead to insomnia. After taking the medicine according to the doctor's instructions, he will get better gradually. He is suffering from anxiety.
Anxiety disorder is usually treated and cured by drugs. At present, I haven't heard that anxiety can be cured without taking medicine, especially for symptoms like your husband. My friend's anxiety disorder was similar to your husband's, but he recovered through medication. The main drugs for treating anxiety disorder are imported western medicine-stuffed with special domestic western medicine-Leyou. Of course, the doctor's guidance is very important, and he must follow the doctor's instructions.
The only way for you now is to talk to your husband. Anxiety must go to the hospital for examination and treatment. There is nothing to be afraid of. Many people have suffered from it. It is mainly caused by things around us and psychological pressure. You should also guide your husband to get sick and ask for medical treatment. If your husband is willing to listen to you, it will be easy.
If you have anxiety, don't see a doctor. Now many criminals use what is important to cure anxiety, free treatment, treatment first and then payment, follow-up treatment and so on. Most of them are lies. Be careful of being cheated.
I suggest you and your husband go to a regular big hospital to find a doctor in psychology or psychological counseling. My friend used to see a doctor in the psychological counseling department for treatment.
May your husband recover in Japan and his family be happy. I hope my answer can help you.
Thank you for your adoption.