relationship between the first pass effect and bioavailability
Parenteral administration is used when the patient is unable to take the drug orally, rapid action of medication is needed, and medication is ineffective in the gastrointestinal tract. Parenteral administration is also used to avoid the gastrointestinal tract and its first pass effect and to delivery medication to specific organs or tissues.
•Parenteral -Intravenous route •Direct injection of drug into the blood therefore better regulation of therapeutic levels. •The First pass effect is avoided and by-pass all barriers •Rapid drug action •Used when drug irritates the tissue •Increased risk of infection, Pain at site of injection, increased risk of overdose. -Intramuscular route •Injection into the deltoid muscle region or gluteal mass. •Rate of absorption determined by blood flow to muscle. •Used for injection of suspensions and sustained effects •Avoid the First pass effect -Subcutaneous route •Injection into the subcutaneous areolar tissue and skin capillaries •Implants produce slow release of drug and constant absorption into the blood. •Avoid First pass effect •Rate of drug absorption is influenced by blood flow to the skin. Drug absorption is slower than I.M. -Intradermal route •Injection into the epidermis of the skin. •Small amounts of drugs are administered, ie. Local anesthetics, tuberculosis test. •Avoid First pass effect
The medical term for the liver's function of filtering newly introduced drugs or toxins before the blood is returned to the rest of the body is "hepatic first-pass metabolism."
sublingual
You don't do drugs.
there is no easy drug test to pass. All drug tests are easy to pass if you aren't taking any drugs in the first place
You shouldn't be doing drugs in the first place!
shouldn't have taken the drugs in the first place and if u didnt take drugs just be calm and do your best :)
The only way to reliably pass a drug test is to simply not do the drugs they are testing for.
Your best way to pass a urninalysis is to not to drugs in the first place if you're subject to testing.
U can pass by not doing drugs