Please do not stop taking Neugaba M 75 abruptly. Since you have been taking this medication for 6 years, stopping it suddenly can trigger severe withdrawal symptoms, such as anxiety, insomnia, sweating, or a return of your nerve pain. Mild sedation is a common side effect of Pregabalin (the active ingredient). I strongly advise consulting your doctor before making any changes. They can safely evaluate your condition and may suggest adjusting your dose, changing the timing (such as taking it at bedtime), or slowly tapering you off the medicine if it is no longer needed.