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why? some drugs don't work under tongue?
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why? some drugs wont work under toung?
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Not all drugs are suitable for sublingual administration because several factors can affect their absorption through the oral mucosa
.
Here's why some drugs don't work effectively when taken sublingually:
1. Drug Properties:
- Solubility: A drug needs to dissolve readily in saliva to be absorbed sublingually. If it's not sufficiently water-soluble, it won't dissolve quickly enough for effective absorption.
- Lipid Solubility: After dissolving in saliva, the drug also needs to be able to pass through the lipid-rich cell membranes of the oral mucosa to enter the bloodstream. A drug that's too hydrophilic (water-loving) or too lipophilic (fat-loving) might not be absorbed efficiently.
- Molecular Size: Larger molecules might have difficulty diffusing through the oral mucosa.
- pH and Stability: The pH of saliva and the stability of the drug in the salivary environment can also influence sublingual absorption.
2. Drug Formulation:
- Form of the Drug: Sublingual tablets or films are specially formulated to disintegrate quickly and release the drug for absorption. Regular tablets or capsules may not be designed for this route and may not release the drug properly.
- Fillers and Excipients: Some medications contain fillers or excipients that might not be suitable for sublingual administration and could hinder absorption or cause irritation.
3. Patient Factors:
- Excess Saliva: Excessive salivation can wash away the drug before it's absorbed.
- Mouth Sores or Irritations: Open sores or irritations in the mouth can affect absorption and cause discomfort.
4. Drug Design & Targeted Release:
- Sustained-Release Formulations: Some drugs are formulated for sustained or extended release in the gastrointestinal tract. These formulations are not suitable for sublingual use.
- Drugs Requiring Gastric Acid: Some medications need to be exposed to stomach acid for optimal absorption or to activate the drug. Sublingual administration bypasses the stomach, making it ineffective for these types of drugs.
In summary, for a drug to be effectively absorbed sublingually, it needs to possess specific properties and be formulated appropriately. If a drug doesn't meet these criteria, it may not be absorbed efficiently and may not produce the desired therapeutic effect when taken sublingually.
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This is for informational purposes only. For medical advice or diagnosis, consult a professional. AI responses may include mistakes.
Sublingual administration doesn't work for medications that need to be released slowly.
Some tablets or capsules are formulated to prolong the medication's release into the body. This includes sustained-release products. For these medications, sublingual administration usually isn't a good idea.
on HPBCD.......
HPBCD is known for its excellent solubilizing properties, making it a valuable excipient in pharmaceutical formulations.
It can enhance the solubility and bioavailability of poorly soluble drugs, improving their therapeutic efficacy.
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