Continuing coverage: Patients with asthma and severe allergies are often not taught how to use their medical devices properly. Asthma UK said in some cases poor technique led to people being put on stronger inhalers than they actually needed. And studies by Allergy UK suggest people struggle with instructions on auto-injectors in allergy emergencies. The charities are calling for better training for patients and UK National Health Service staff. The warning comes after a separate U.S. study revealed only 16 percent of those prescribed adrenalin auto-injectors in case of a potentially life-threatening allergic reaction used them properly. Study leader Dr. Rana Bonds from UTMB said the results suggested people weren't properly trained in using the devices in the first place or "forgot the instructions over time.”