Can You Get In Trouble From Buying Restoril without a Script Online?:- Restoril is a prescription oral medication directly taken by mouth. The doctor will advise you on the dosage frequency of Restoril 15mg and Restoril 30 mg. The dose of Restoril is 30 mg and an adult should take it one hour before bedtime. After taking this medicine may stay effective for 7-8 hours. So, operating heavy machinery or driving while using this medication under the influence is not a good idea.