A North Otago man who was feeling a little green after consuming cannabis called 111 on himself today.

A police spokeswoman said they received a call about midday today by a man who was ''outside Mobil and needed ambulance assistance'' after his Sunday night session in Omarama went south.

''He said he had consumed cannabis the night before and was having a reaction.''

The man ''was not in possession of any drugs'' and has not been charged, the spokeswoman said.

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The man was due to have a medical assessment this afternoon.