Its been the norm since the 1960s when Phillip Morris (of Marlboro fame) fronted the research which discovered that by freebasing nicotine, they could make their cigarettes stronger and, therefore, more addictive
Thermo-urethane outsole for improved resistance to hydrolysis and microbial attack
10.4103/ipj.ipj_200_23 39
The relationship between the duration of smoking and systolic blood pressure was found in the participants under 40 years old (every additional year of smoking was associated with 0.095 mmHg increase, 95% CI 0.016 to 0.174, P = 0.018, in systolic blood pressure) and over 60 years old (every additional year of smoking was associated with 0.101 mmHg increase in systolic blood pressure, 95% CI 0.024 to 0.178, P = 0.010), but not in other subgroups
No sign of withdraw
Consent is not a condition of purchase, and no purchase is necessary