I did know a woman who was a psychiatric nurse. She mentioned to me once that meds do change a person's natural scent. It makes sense to me, because meds change our ability to sweat and such.
I have, however, noticed a strong scent on some men from their 50's on. It is not the classic "BO" smell, not at all. It's a sharp, rather suffocating scent. I have researched it some because my husband has the scent to him. He's 72, scrupulously clean, and eats the cleanest diet of anyone I know. But that smell is strong. I started noticing it about 7 years ago. He is not on any meds, but does have a decent case of OCD.
With most people (it seems to be men, in particular) the scent is some sort of hormonal thing going on. It's the "old person" smell, sadly. Many elderly people wonder why others avoid them...well, the smell might be why.
According to the research I've done, the scent I'm referring to (and maybe I'm incorrect, but it sounds like what you've described) is not a medical issue per se. It's just an endocrine thing. But in a society that places a lot of emphasis on personal scent, it can cause probs with relationships, which to me seems very sad.
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