Is 白加黑 ("white add black") slang for 感冒药 ("cold medicine")? I'm reading the book 喜欢你，我也是, and I encountered this:

张侃侃无语地摊摊手：“可我既不是医生，也不是白加黑啊！”
“对于生病的谈晋而言，你就是他的医生，就是他的白加黑。”叶莉亚边说边郑重地点了点头。

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I understand 张侃侃 has received a text message from 谈晋 who says he has a cold.  张看看 says she's not his doctor and also not his 白加黑 (lit.: &quot;white add black&quot;).
I didn't find a clear definition of 白加黑 in a dictionary; Baidu Baike suggests it's a kind of medicine (which is on sale at JingDong; image), so I'd guess this is a brand name that's so popular that it's used to mean 感冒药 (&quot;cold medicine&quot;).  I'm hoping this can be confirmed, corrected, expanded upon, etc.
Question: Is 白加黑 (&quot;white add black&quot;) slang for 感冒药 (&quot;cold medicine&quot;)?
白加黑 

It is not so much a slang but a general term for cold medicine. When a brand is so popular, people would use it to describe the product itself, like 公仔麵 (instant noodle)  and 花奶 (evaporated milk) in Hong Kong

白加黑:



公仔麵:



花奶