Estop Plus may cause side effects such as drowsiness, dizziness, dry mouth, fatigue, poor concentration, and sometimes dependence or withdrawal symptoms if used regularly for a long time. Alcohol and other sleep or anxiety medicines can increase sleepiness and should be avoided unless advised by a doctor. Take it exactly as prescribed, usually at night, and avoid driving or operating machinery if you feel sleepy. Do not stop the medicine suddenly without medical guidance. Good sleep habits, stress management, and regular follow-up with a psychiatrist or physician are important for long-term insomnia management.