Nausea occurs in approximately 25 percent of patients; prophylactic measures may not be required.
Patients who do develop nausea will require antiemetic treatment with an anti-psychotic, prokinetic agent, or serotonin antagonist.
Report any symptoms to your physician promptly, but especially such potentially serious side effects as • Confusion, restlessness, hyperactivity • Fast, pounding, or uneven heartbeat • Sleep problems, weakness, uncontrollable shaking • Vision problems • Urinating less than usual or not at all Be aware that it may be difficult to discontinue cetirizine if it has been taken continuously for some time.
In fact, most over-the-counter sleep aids contain antihistamines.
These products are intended to be used for only two to three nights at a time, however, such as when stress, travel or other disruptions keep you awake.
Diphenhydramine and doxylamine have anticholinergic properties that make them poor choices for older adults.
Recent studies have shown that anticholinergics may increase the risk of dementia.
Tolerance to the sedative effects of antihistamines can develop quickly.