My doctor prescribed clonazepam 1mg to help with anxiety. will it harm me to take 2mg tablet?

No: Never change the dosage of a prescribed medication without informing your prescribing doctor. There's a reason you were prescribed that dosage.

Need 2ask him: It is a safe drug but u need 2 let your dr prescribe.

Clonazepam: should usually be taken twice a day in the lowest amount that works. Occasionally it wears off after 10 hours and needs to be given three times a day. Higher doses (like 2 mg) increase the risk of cognitive impairment, respiratory depression and clinical depression. Changing the dose or schedule should be done under close supervision. Don't risk seizures by abrupt discontinuation / running out