Cough medicine for the ages
It’s unclear quite when the bottle was made, but Kohler Manufacturing made this syrup from the 1880s onwards and these types of syrup were typical throughout the 1900s. All that is clear is that this particular syrup was made after 1906, as it is abiding by the “Food and Drugs Act 1906”, which prohibited the unlawful movement of food and drink in the US.
Interestingly, while the syrup seems mind-boggling to us, it was highly typical of cough medicines at the time. Morphine, heroin, and other poppy derivatives were used for pain suppression and to stop coughing. Chloroform also supposedly helped with coughs and made the patient sleepy (maybe a bit too sleepy), and alcohol and cannabis helped take the edge off, again to aid sleep.
Opioids became more regulated and chloroform use was stopped after the FDA found it increased risk of cardiac arrest and cancer in 1976, so cough syrups made a large pivot in the late 1900s, but there are plenty of examples of these wild remedies still intact.