Based on the initial look at the `opioids.csv` data, I've identified the following issue:

### Issue 1

- **Issue**: Unnecessary rows at the beginning of the `opioids.csv` file
- **Evidence**: "Part D Prescriber Summary: Opioids,," and ",,"
- **Description**: The first two rows of the `opioids.csv` file do not contain relevant data related to opioid drugs. Instead, these rows seem to contain metadata or a description that should not be in the main body of the dataset. The second row is entirely blank (represented by ",,"), and the first row contains a title or header "Part D Prescriber Summary: Opioids,," that doesn't conform to the expected structure of the data. According to the <hint>, rows containing actual drug information should start directly with the drug name and its generic name without preceding metadata or description rows.

Next, let's check the contents of the `readme.md` file to see if there's any relevance or specific instructions related to the dataset that might help with the detection of issues.After reviewing the `readme.md` file, there doesn't appear to be a direct reference to the specific structure of the `opioids.csv` file or instructions that would indicate the presence of metadata rows as being necessary. Therefore, the previously identified issue stands without any additional context from the README that would justify the format anomalies identified in the `opioids.csv` file. 

The README provides an overview of the dataset, its purpose, and what it contains, but it does not mention the need for or the presence of initial rows in the `opioids.csv` file that are not directly related to the data (such as the dataset title or blank rows). No further issues were detected based on the provided hint and the contents of the README.

If there are no specific tasks related to the `readme.md` content according to the hint provided, then there are no issues to report from the README file based on the current review task focused on unnecessary rows in the dataset files.