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Clonazepam vs. Lorazepam: What's the Difference?

Clonazepam and Lorazepam are both medicines that help people feel calmer and less anxious. They belong to a group of medicines called benzodiazepines. Even though they are similar, they are used for different reasons and work in slightly different ways. Let’s take a closer look at both of these medicines and understand their differences.

What is Clonazepam?

Clonazepam, also known by the brand name Klonopin, is often used to help control seizures. It is also used to treat panic disorder, which is a type of anxiety that makes people feel very scared suddenly. Clonazepam works by calming the brain and nerves.

What is Lorazepam?

Lorazepam, also called Ativan, is used mainly to treat anxiety. It can also help with sleep problems, like insomnia, and it can calm people down before a medical procedure. Like Clonazepam, Lorazepam helps to calm the brain and nerves.

How Do They Work?

Both Clonazepam and Lorazepam work by increasing the effects of a chemical in the brain called GABA. This chemical helps to calm the brain, which reduces anxiety, relaxes muscles, and stops seizures.

How Quickly Do They Work?

  • Clonazepam: This medicine usually starts working in about 30 to 60 minutes after you take it. The effects can last for up to 12 hours.
  • Lorazepam: This medicine works a bit faster, usually within 20 to 30 minutes. However, its effects last for about 6 to 8 hours.

How Long Do They Stay in the Body?

  • Clonazepam: Because it works for a long time, Clonazepam is good for people who need ongoing treatment for things like seizures or long-term anxiety.
  • Lorazepam: This medicine doesn’t stay in the body as long, so it’s better for short-term use, like calming someone down quickly or helping them sleep.

What Are They Used For?

  • Clonazepam: Mainly used to control seizures and help with panic disorder.
  • Lorazepam: Used to treat anxiety, help with sleep problems, and calm people down before surgeries or other medical procedures.

Side Effects

Both Clonazepam and Lorazepam can cause some side effects. These might include feeling sleepy, dizzy, or unsteady. Some people might also have problems with memory or feel confused.

Common Side Effects:

  • Clonazepam: Sleepiness, dizziness, coordination problems, and increased saliva.
  • Lorazepam: Sleepiness, dizziness, memory problems, and sometimes feeling more anxious or agitated.

Dependence and Withdrawal

Both medicines can be habit-forming, which means people can get used to taking them and might feel sick if they stop suddenly. It’s important to use these medicines exactly as the doctor says and not to stop taking them without talking to a doctor first.

FAQs about Clonazepam and Lorazepam

Q: Which medicine works faster? A: Lorazepam works faster, usually within 20 to 30 minutes. Clonazepam takes a bit longer, about 30 to 60 minutes.

Q: Which one lasts longer? A: Clonazepam lasts longer, up to 12 hours. Lorazepam usually lasts about 6 to 8 hours.

Q: Can these medicines be used for kids? A: Sometimes doctors prescribe these medicines for kids, but only for specific reasons and under close supervision.

Q: Can I get addicted to these medicines? A: Yes, both Clonazepam and Lorazepam can be habit-forming, so it’s important to use them only as directed by a doctor.

Q: What should I do if I miss a dose? A: If you miss a dose, take it as soon as you remember. If it’s almost time for your next dose, skip the missed dose. Don’t take two doses at once.


Clonazepam and Lorazepam are both helpful medicines for treating anxiety, seizures, and other conditions. They work in similar ways but are used for different reasons. Clonazepam is usually for long-term treatment, while Lorazepam is better for quick relief.

For those who need these medicines, options like lorazepam purchase online and clonazepam for sale are available through reliable sources. Websites such as CalmPillsUK offer convenient ways to buy clonazepam UK, ensuring you get the medication you need safely and quickly.

Always talk to your doctor before starting or stopping these medicines. They can help you use them safely and effectively.

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