Some of the Ayurveda medicines use heavy metals for treating Acne which is never safe for human body. Also it has yet to be proven scientifically that this way of treating acne is effective, although there is no proven or popular research available till date.
If you are interested in using any such medicine then its better to use few ‘topical’ remedies. Its better to consult the doctor before ingesting exotic ingredients to avoid any undue injury to your health.