Reaction to certain medications. 1  Environmental irritants. 2  Poor oral hygiene. 3  Tobacco exposure or alcohol consumption. 4  Candida yeast infection (Oral Thrush) 5  Tongue inflammation, such as Glossitis. 6  Spicy foods such as habanero and jalapeÃ±o peppers contain compounds in the peppers that are correlated with white tongue.
Heroin (diacetylmorphine) is used for treatment of severe acute pain (such as severe acute pain due to myocardial infarction or heart attack, end stage cancer pain, post surgical pain, terminal illnesses etc.) in some countries (such as United Kingdom), as strong analgesic.
In 2014 in the US, about 435,000 people used heroin. In the same year, about 4.3 million people were nonmedical users of narcotic pain relievers. This means they were taking narcotics that were not prescribed to them.