Taking 300 mg of magnesium per day without interruption is generally not dangerous. However, it is always a good idea to consult with your doctor to discuss any potential risks or concerns. It is important to consider any underlying health conditions that may affect how your body processes magnesium. Your doctor can also help evaluate if magnesium is helping with your pain management and adjust your treatment plan if needed. Remember to follow up with your doctor regularly to monitor your magnesium levels and overall health.