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What is the slowest method to administer a drug and why?
Eating or drinking a drug is the slowest route, because the drug has to pass through the stomach first. Once in the brain drugs affect chemicals called neurotransmitters.
What are the methods of drug delivery?
Common routes of administration include oral, parenteral (injected), sublingual, topical, transdermal, inhaled, rectal, and vaginal, however drug delivery is not limited to these routes and there may be several ways to deliver medications through each route.
How do drugs travel to the brain?
Drugs interfere with the way neurons send, receive, and process signals via neurotransmitters. Some drugs, such as marijuana and heroin, can activate neurons because their chemical structure mimics that of a natural neurotransmitter in the body. This allows the drugs to attach onto and activate the neurons.
What are the 4 ways drugs enter the body?
Substances can enter the body through various means. Drugs can be smoked, snorted, injected, swallowed (pills, capsules, liquids), or applied through transdermal means (applied to the skin).
Which of the following is the slowest way for a drug to reach the bloodstream?
Administration by the oral route is the slowest way for medication to reach the body's cells. The oral route may be referred to as PO or by mouth.
Which route of administration has the longest duration?
Intradermal injections (ID) are injections administered into the dermis, just below the epidermis. The ID injection route has the longest absorption time of all parenteral routes.
Which drug delivery system has the longest duration of action?
The present limit on duration of rate-controlled oral products is currently set by the transit of solid dosage forms through the gastrointestinal tract: the longest of the oral delivery system products has a delivery time of 18 h [7].
How does the nose absorb drugs?
Absorption of drug via the nasal cavity can be described as diffusion of drug into system circulation via the nasal mucosa. Mucosal absorption via the nasal cavity usually follows: drug release, penetration (entry into a layer), permeation (transition of a layer), and absorption (uptake into the vascular system).
How do drugs affect the brain of a teenager?
Drug abuse can impact the brain's ability to function in the short term as well as prevent proper growth and development in the long term. Substance abuse affects teen brain development by: Interfering with neurotransmitters and damaging connections within the brain. Reducing the ability to experience pleasure.
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