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.
Medications & Vitamins. Q: A: A refill for a 30-day retail prescription can be refilled when there is no more than a 7-day supply remaining, and a 90-day prescription can be refilled when there is no more than a 14-day supply remaining, as stated by the North Carolina State Health Plan; however, this is a federal law that applies to all states.