San Francisco’s mayor plans to put medical teams on the streets to distribute a drug that curbs heroin cravings in opioid addicts, an initiative he says will be the first in the country. Mayor Mark Farrell announced Thursday he will allocate $6 million for 10 new public health clinicians to provide the opioid treatment medicine buprenorphine, known as Suboxone, directly to users. Buprenorphine is a daily pill or dissolvable strip that reduces cravings and alleviates withdrawal symptoms. It also reduces risk of overdose. Video and photos of people shooting up drugs in public have gone viral in recent weeks and...