Penicillin is the drug most offered because it will not harm your baby and it syphilis cannot be spread through the breastmilk.
I would say the teen doesn't think of the consequences that not having good health habits maybe affect them in their life later on. Also maybe the parents don't encourage them to live a healthier life.
Apparently, these are some symptoms(not all r bad).
Lung Irritation
Phlegmy cough
Bronchitis
Red eyes
Accelerated heartbeat
A dose of dopamine
Memory problems
Impaired judgement
Slowed reaction time
Glaucoma relief
Trouble for the immature brain
Pain relief (ex: On leg or thigh or arm.)
Withdrawal
Burning mouth
Settled stomach
Defense goes down
eases nausea and vomiting