Not all counselors have experience with substance use, or the ability to determine if someone is under the influence or experiencing drug interactions. However, knowing the signs and symptoms, and being able to recognize them, are important for counselors. How can you tell if someone is under the influence of a substance, having an adverse medication reaction, a medical issue, or other mental health disorder? Some of these can present in similar ways. What are some ways that you can increase your skill in this area?