Food and Drug Administration
EXACERBATION of side effects. You get double the side effects of sleepiness, dullness, dry mouth and impaired judgement. It is better to take an antihistamine alone or a cold medication preparation, which contains this. Do not take both. Also, take it at bedtime, so that it would help by causing sleepiness.
Drug response can be impacted by several factors including diet, comorbidities, age, weight, drug–drug interactions, and genetics. Individual genetic variation in key genes involved in the metabolism, transport, or drug target can contribute to risk of adverse events108 or treatment failure.
Testosterone
Growth hormone
Insulin-like growth factor
Cortisol