The drugs that are used when there is a lack of natural chemical messenger is called ______a)antagonistsb)agonistsc)analgesicsd)narcoticsCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Agonists:
Agonists are drugs that are used when there is a lack of natural chemical messengers in the body. These drugs mimic the action of the natural chemical messenger and bind to the same receptors, activating them to produce a specific response. By doing so, agonists help restore the balance of chemical messengers in the body and can help alleviate symptoms associated with a deficiency.

Role in Replacing Natural Chemical Messengers:
When the body is not producing enough of a specific chemical messenger, agonists can be used to supplement or replace the missing substance. For example, in conditions like Parkinson's disease where there is a lack of dopamine, dopamine agonists can be prescribed to help alleviate symptoms by activating dopamine receptors in the brain.

Types of Agonists:
There are different types of agonists that can be used depending on the specific chemical messenger that is deficient. Some common examples include opioid agonists for pain relief, beta-agonists for asthma treatment, and dopamine agonists for Parkinson's disease.

Effectiveness and Side Effects:
While agonists can be effective in restoring the balance of chemical messengers in the body, they can also have side effects. These side effects can vary depending on the specific agonist used and the individual's response to the medication. It is important for healthcare providers to carefully monitor patients who are prescribed agonists to ensure that the benefits outweigh the risks.

Answer

Agonists are drugs that replicate the behaviour and properties of the chemical messenger and activate the receptor. These are used when the actual messenger is not present in the body.

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