One example is the common allergy drug diphenhydramine (also known by the brand name Benadryl). Though it eases allergy symptoms, it also suppresses the activity of the body chemical acetylcholine, and that leads to drowsiness and a host of other side effects, including dry mouth.
Intermediate care provides basic medical care. Skilled care provides more intensive medical care. Individuals are attended by professional nurses operating under the direction of physicians. They may be freestanding or part of a senior community, and are licensed by state and local health agencies.
From Wikipedia: Tertiary care is specialized consultative health care, usually for inpatients and on referral from a primary or secondary health professional, in a facility that has personnel and facilities for advanced medical investigation and treatment, such as a tertiary referral hospital.