April 29, 2017
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Klonopin Patient Information Including Side Effects

Brand Names: Klonopin, Klonopin Wafer

Generic Name: clonazepam (Pronunciation: kloe NAZ e pam)

What is clonazepam (Klonopin)?

Clonazepam is in a group of drugs called benzodiazepines (ben-zoe-dye-AZE-eh-peens). Clonazepam affects chemicals in the brain that may become unbalanced and cause anxiety.

Clonazepam is used to treat seizure disorders or panic disorder.

Clonazepam may also be used for purposes not listed in this medication guide.

Clonazepam 0.5 mg832-TEV

round, yellow, imprinted with 832, TEVA

Clonazepam 0.5 mg-AND

round, white, imprinted with G, CN 0.5

Clonazepam 0.5 mg-APO

round, orange, imprinted with APO C-0.5

Clonazepam 0.5 mg-EON

round, yellow, imprinted with E 63

Clonazepam 0.5 mg-MYL

round, yellow, imprinted with M, C 13

Clonazepam 0.5 mg-PUR

round, pink, imprinted with R33

Clonazepam 0.5 mg-TEV

round, yellow, imprinted with 93 832

Clonazepam 0.5 mg-WAT

round, yellow, imprinted with WATSON 746

Clonazepam 1 mg833-TEV

round, green, imprinted with 833, TEVA

Clonazepam 1 mg-APO

round, blue, imprinted with APO C-1

Clonazepam 1 mg-EON

round, blue, imprinted with E 64

Clonazepam 1 mg-MYL

round, green, imprinted with M, C 14

Clonazepam 1 mg-PUR

round, yellow, imprinted with R34

Clonazepam 1 mg-WAT

round, blue, imprinted with WATSON 747

Clonazepam 2 mg DT-BAR

round, white, imprinted with 2

Clonazepam 2 mg834-TEV

round, white, imprinted with 834, TEVA

Clonazepam 2 mg-APO

round, white, imprinted with APO C-2

Clonazepam 2 mg-EON

round, white, imprinted with E 65

Clonazepam 2 mg-MYL

round, white, imprinted with C 15, M

Clonazepam 2 mg-PUR

round, white, imprinted with R35

Clonazepam 2 mg-WAT

round, white, imprinted with WATSON 748

Klonopin 0.5 mg

round, orange, imprinted with K ROCHE, 1/2 K KLONOPIN

Klonopin 1 mg

round, blue, imprinted with K ROCHE, 1 K KLONOPIN

Klonopin 2 mg

round, white, imprinted with 2 KLONOPIN, ROCHE

What are the possible side effects of clonazepam (Klonopin)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Report any new or worsening symptoms to your doctor, such as: mood or behavior changes, depression, anxiety, or if you feel agitated, irritable, hostile, aggressive, restless, hyperactive (mentally or physically), or have thoughts about suicide or hurting yourself.

Call your doctor at once if you have a serious side effect such as:

  • confusion, hallucinations, unusual thoughts or behavior;
  • weak or shallow breathing;
  • unusual risk-taking behavior, no fear of danger;
  • unusual or involuntary eye movements;
  • pounding heartbeats or fluttering in your chest;
  • painful or difficult urination, urinating less than usual;
  • pale skin, easy bruising or bleeding; or
  • new or worsening seizures.

Less serious side effects may include:

  • drowsiness, dizziness, problems with thinking or memory;
  • tired feeling, muscle weakness, loss of balance or coordination;
  • slurred speech, drooling or dry mouth, sore gums;
  • runny or stuffy nose;
  • loss of appetite, nausea, diarrhea, constipation;
  • blurred vision;
  • headache;
  • sleep problems (insomnia);
  • skin rash; or
  • weight changes.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the Klonopin (clonazepam) Side Effects Center for a complete guide to possible side effects

What is the most important information I should know about clonazepam (Klonopin)?

You should not use this medication if you have severe liver disease, of if you are allergic to clonazepam or to other benzodiazepines, such as alprazolam (Xanax), chlordiazepoxide (Librium), clorazepate (Tranxene), diazepam (Valium), lorazepam (Ativan), or oxazepam (Serax).

Clonazepam may cause harm to an unborn baby, and may cause breathing or feeding problems in a newborn. But having seizures during pregnancy could harm both mother and baby. Do not start or stop taking clonazepam during pregnancy without medical advice.

You may have thoughts about suicide while taking this medication. Your doctor will need to check you at regular visits. Do not miss any scheduled appointments. Call your doctor at once if you have any new or worsening symptoms such as: mood or behavior changes, depression, anxiety, or if you feel agitated, irritable, hostile, aggressive, restless, hyperactive (mentally or physically), or have thoughts about suicide or hurting yourself.

Before you take clonazepam, tell your doctor if you have kidney or liver disease, glaucoma, any breathing problems, or a history of depression, suicidal thoughts, or addiction to drugs or alcohol.

Do not drink alcohol while taking clonazepam. This medication can increase the effects of alcohol.

Clonazepam may be habit-forming and should be used only by the person it was prescribed for. Keep the medication in a secure place where others cannot get to it.

Side Effects Centers

Klonopin - User Reviews

Klonopin User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Klonopin sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


Find tips and treatments to control seizures.