The dosage of Ativan (lorazepam) can vary depending on several factors, including the condition being treated, the individual's age, weight, and overall health. However, here are general guidelines for typical dosages of Ativan:

• For anxiety disorders: Initial dose: 2 to 3 mg per day, divided into two to three doses. Maintenance dose: 1 to 2 mg, two to three times daily.
• For insomnia due to anxiety: 2 to 4 mg at bedtime.
• For preoperative sedation: 2 to 4 mg given 1 to 2 hours before surgery.
• For alcohol withdrawal: 2 to 4 mg given three to four times daily.
• For status epilepticus (severe, prolonged seizures):4 mg given slowly intravenously, may repeat if necessary.

• Common side effects of Ativan may include drowsiness, dizziness, weakness, headache, confusion, and blurred vision. Other potential side effects include memory problems, slurred speech, nausea, constipation, changes in appetite, and difficulty concentrating. If any of these side effects persist or worsen, it's important to inform your healthcare provider.
• Serious side effects of Ativan may include allergic reactions, difficulty breathing, hallucinations, severe drowsiness, slowed breathing, and suicidal thoughts. Seek immediate medical attention if you experience any of these symptoms. 

• Ativan should only be used under the guidance of a healthcare professional and exactly as prescribed.
• Avoid consuming alcohol or other central nervous system depressants while taking Ativan, as it can increase the risk of respiratory depression and overdose.
• Do not abruptly stop taking Ativan without consulting your doctor, as it may lead to withdrawal symptoms.
• Inform your healthcare provider about any other medications, supplements, or herbal products you are taking before starting Ativan, as it may interact with certain substances.