When discussing side effects of a drug, it's important to consider that most medications can have some side effects, but not everyone experiences them. Side effects can range from mild to severe and depend on the specific drug in question. Common side effects might include nausea, headache, dizziness, or allergic reactions. If you have a particular medication in mind, I can provide more detailed information about its potential side effects. Always consult your doctor if you experience any unusual symptoms after taking a medication, and never stop or change your medication without professional advice.