Suboxone Withdrawal is the Worst Ever!

In this clip, a man speaks to the camera about various ways to stop an addiction. One of the options he describes is suboxone, a medication similar to methadone, which can help wean someone off of opiates.

If you search for withdrawal in YouTube, you can find dozens of videos of people who are going through withdrawal and detoxification from many different types of drugs. Do all drugs cause physical dependence? Can you suffer from withdrawal symptoms if a drug only causes psychological dependence?