The main health risk with cocaine is overdose. It is difficult to cocaine but it can be done. Most deaths have been caused by accidental overdose, especially with cocaine dissolved in drinks.

Cocaine overdose is not nice: convulsions, heart failure, or the depression of vital brain centres controlling respiration. Result: usually death.

one nostril
The other main physical danger you face is damaging or perforating the septum, the thin membrane that separates the nostrils at the top of the nose. Regular coke snorters often suffer instant nosebleeds when snorting the drug. Occasional users may detect next-day bloodied mucus and congestion. Heavy users have their septums dissolved by corrosive effects of cocaine.

It does not grow back.

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coke wanker
The other main danger, of course, is that you turn into a boring, coke-addled wanker spending parties in a 'coke cycle': exchanging looks with your little entourage and then going off for a toot in the toilets; dabbing every last molecule of powder off the cistern; and then rejoining the gathering with a sudden inexplicable burst of talkativeness before lapsing into frozen, jaw-clamped silence as you wait for the next line.

Cocaine is used extensively in the media and music industries.