3. An opiate drug that is used in some prescription cough medicines is a. codeine b. rohypnol c. morphine d. ketamine b a d c

## Step 1<br />The question is asking for the identification of an opiate drug that is used in some prescription cough medicines. Opiates are a type of narcotic pain medication that are derived from the opium poppy. They are known for their ability to relieve pain and induce sleep.<br />## Step 2<br />Among the options provided, codeine is the correct answer. Codeine is an opiate that is commonly used in prescription cough medicines. It is known for its ability to relieve pain and induce sleep.<br />## Step 3<br />The other options, Rohypnol, Morphine, and Ketamine, are not typically used in cough medicines. Rohypnol is a powerful sedative, Morphine is a potent pain reliever, and Ketamine is an anesthetic.