1. (General Engineering) tungsten-electrode inert gas welding: a method of welding in which the arc is maintained by a tungsten electrode and shielded from the access of air by an inert gas. Compare MIG welding.
A prescription for a controlled drug is valid for 28 days from the date given on the prescription. usually six months unless it's a controlled i.e. morphine, pethidine and methadone. These medicines are often misused, so have stricter legal controls on their supply to prevent them being obtained illegally. A prescription for a controlled drug is valid for 28 days from the date given on the prescription.
This means that your doctor cannot give you an unlimited amount of refills. If the doctor writes you a prescription for 3 years, or puts 10 refills on the prescription, you will only be able to refill the prescription for up to 18 months (or 1 year) from the day it was brought to the pharmacy. Why canât prescriptions be refilled for longer than 18 months?