My wife has negative reactions to it, which is extremely rare at normal doses (to the point many doctors don't believe her). Trying to find medicine for her wh

My wife has negative reactions to it, which is extremely rare at normal doses (to the point many doctors don't believe her). Trying to find medicine for her when she's sick is surprisingly time consuming as it is in so many things even vaguely related to treating cold / cough / flu symptoms.