This sounds like something for an expert witness to consider. You should look to talk to an attorney who specializes in DUI defense, they know experts to talk to about the use of medications and their impact on a person. They should also be able to talk with someone about the potential for drug interaction.
This should be a question for his criminal defense attorney or an immigration attorney. The level of the offense is important. The repeated nature of the offenses is also something that immigration will take in to account. His family and their presence here will also be taken into consideration. Talk to his criminal defense attorney or an immigration attorney near you.
It means that their may be something wrong with the testing apparatus. I would find a DUI/DWI specialist in your area. Set up a free initial consultation, they may need to hire an expert on your behalf to address this issue.
If your case is actually dismissed it seems unlikely she would have a case. It also seems unlikely that she has a case even if your charge was substantiated because his children were not involved, and he was not the one being charged. I still would advise you to speak to an attorney in your area, at least get a free initial consultation to determine what your options are. I am not licensed to practice law in Ohio.
It depends on the level of the offense. It depends on the probation status. It will also depend on the immigration laws of the place that you are trying to move. It would be best to sit down with an attorney so that they can go over some of these more detailed questions with you. Many criminal defense attorney's will do free consultations and work with you over the phone.
Generally prosecutors do not make the best offers to pro se litigants. You should seek a free initial consultation with a lawyer in your area that specializes in DWI/DUI defense. They will be able to provide you with your options.
If you have a prescription for the drugs then the answer is no. With a valid prescription it would allow you to use despite a provision of non-use in a felony probation sentence or probation agreement.