What Are the Most Common Diphenhydramine Side Effects?
Diphenhydramine Hydrochloride English name Diphenhydramine Hydrochloride, molecular formula is C17H22ClNO, alias Benazin, Ketamine; chemical name is N, N-dimethyl-2- (diphenylmethoxy) ethylamine hydrochloride. Can eliminate allergic symptoms.
Diphenhydramine hydrochloride
- Diphenhydramine Hydrochloride English name Diphenhydramine Hydrochloride, molecular formula is C17H22ClNO, alias
- Can eliminate allergic symptoms. its
- Method name: Determination of Diphenhydramine Hydrochloride-Neutralization Titration
- Application range: This method uses the titration method to determine the content of diphenhydramine hydrochloride.
- This method is applicable to diphenhydramine hydrochloride.
- Principle of the method: After the test product is dissolved with glacial acetic acid and acetic anhydride, mercury acetate test solution and crystal violet indicator solution are added, and the solution is titrated with perchloric acid titration solution (0.1mol / L) until the solution is blue-green. The amount of fluid used is calculated.
- Reagent: 1. Water (new boiling to room temperature)
- 2. Perchloric acid titrant (0.1mol / L)
- 3. Crystal violet indicator liquid
- Acetic anhydride
- 5. Glacial acetic acid
- 6. Mercury acetate test solution
- 7. Reference Potassium Phthalate
- Sample preparation: 1. Perchloric acid titration solution (0.1mol / L)
- Preparation: Take 750mL of anhydrous glacial acetic acid (calculated with water content, add 5.22mL acetic anhydride per 1g of water), add 8.5mL perchloric acid (70% -72%), shake well, and slowly add acetic anhydride dropwise at room temperature. 23mL, shake while adding, shake evenly after adding, let cool, add an appropriate amount of anhydrous glacial acetic acid to 1000mL, shake well, and leave for 24 hours. If the test sample is easily acetylated, the water content on this page must be determined by moisture measurement, and then the water content of this solution should be adjusted to 0.01% -0.2% with water and acetic anhydride.
- Calibration: Take about 0.16g of standard potassium hydrogen phthalate dried to constant weight at 105 , accurately weigh, add 20mL of anhydrous glacial acetic acid to dissolve, add 1 drop of crystal violet indicator solution, and titrate slowly with Blue, and the results of the titration are corrected with a blank test. Each 1mL of perchloric acid titration solution (0.1mol / L) is equivalent to 20.42mg of potassium hydrogen phthalate. Calculate the concentration of this solution based on the consumption of this solution and the amount of potassium hydrogen phthalate taken.
- Storage: Place in a brown glass bottle and keep tightly closed.
- Crystal violet indicator liquid
- Take 0.5g of crystal violet, add 100mL of glacial acetic acid to dissolve, and get.
- Operation steps: Accurately weigh 0.2g of the test sample, add 20mL of glacial acetic acid and 4mL of acetic anhydride, add 4mL of mercury acetate test solution and 1 drop of crystal violet indicator solution, and titrate with perchloric acid titrant (0.1mol / L) The solution was blue-green, and the titration result was corrected by a blank test. The volume of perchloric acid titrant consumed (mL) was recorded. Each 1 mL of perchloric acid titrant (0.1 mol / L) was equivalent to 29.18 mg of benzyl hydrochloride Lamin (C17H21NO · HCl), that is.
- Note 1: "Precision weighing" means that the weighed weight should be accurate to one thousandth of the weight. Precision requirements.
- References: Pharmacopoeia of the People's Republic of China, compiled by the National Pharmacopoeia Committee, Chemical Industry Press, 2005 edition, Part Two, p.528.
- Common central inhibitory effects, such as drowsiness, dizziness, headache, dry mouth, nausea, vomiting, and discomfort in the upper abdomen. Rare side effects include shortness of breath, chest tightness, cough, and dystonia. It has been reported that closed teeth and laryngospasm can occur after administration. The elderly are prone to stagnation or dizziness for a long time after medication.
- Oral: 12.5 mg per adult, 2 to 3 times daily. Children 2 to 3 times a day, 2.5 to 5 mg for children under 1 year old; 5 to 7.5 mg for children 1 to 3 years old; 7.5 to 10 mg for children 4 to 6 years old; and 10 to 12.5 mg for children over 7 years old.
- When used to prevent motion sickness, it should be taken 1 to 2 hours before travelling, and at least 30 minutes before taking.
- Overdose may cause confusion, convulsions, tremors, dyspnea, and hypotension. Overdose in infants and children can cause agitation, hallucinations, convulsions, and even death. If you take a toxic amount, you can use gastric lavage and catharsis. Diazepam can be controlled while convulsing. Hypotension can be treated symptomatically with vasoconstrictors. Others include oxygen and intravenous fluids and supportive care.
- Pregnancy class B, pregnant women and lactating women should be used with caution, newborns and premature infants are contraindicated. In renal failure, the interval between dosing should be extended. Myasthenia gravis,
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2. Behavioral toxicity-convulsions or seizure thresholds affected 3. Lung, chest or respiratory toxicity-dyspnea |
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3. Behavioral toxicity-ataxia |
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2. Brain toxicity-tumor |
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2. Reproductive toxicity-abnormal development of the urinary system |
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2. Reproductive toxicity-abnormal development of musculoskeletal system 3. Reproductive toxicity-abnormal development of urinary system |
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