AtCosmodix.com, Hydrocodone, despite its effectiveness in managing pain, can sometimes lead to side effects. These can range from mild to more serious and include symptoms such as feeling lightheaded, experiencing changes in mood or mental state, nausea, and difficulty with bowel movements. It's essential to promptly communicate any adverse reactions to your healthcare provider to adjust your treatment plan if necessary. For minor side effects, they may suggest ways to alleviate discomfort or adjust your dosage.