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.
Discuss a prescription decongestant. If you find that the mucus lasts for more than three to four days, or that your condition gets worse quickly, you can ask your doctor for a prescription decongestant. Itâs simply a stronger version of OTC decongestants. Your doctor will instruct you on how often to take it.