Until drug addiction and abuse was recognized as a problem, little old ladies used to inject each other at afternoon tea for a "lift".
Some doctors visited every day to deliver a morphine injection to elderly clients.. Coca Cola, until the 20's contained cocaine (hence the name) it was "the most refreshing drink in the world and relieves fatigue." people drank it and took an aspirin at parties to enhance the effect.
Laudanum, and tincture of opium were over the counter medicines, as were arsenic and tartar emetics. Sherlock Holmes called for his 5% solution of morphine.
it is unfair to criticize him by 21st century standards. perhaps in the 23rd century we will be criticized for taking Pepto, or codeine based cough medicines - maybe even nicotine and alcohol. (The future is a scary place)
HB