شرح صيدلة 💊

✔️ضروري تقرون ال mcq هنا دايما تجي على الاقل عشر نقاط منه بس نوبات يغير بالمنطوق ف انتبهو. اكو بيهن الي جايات نشرناهه فوك

مسأله الفاينل العام اتوقع نفسها بس المطاليب ممكن هوه يحدده مثل هذا السؤال او يريدكم تطلعون الجرعه وتكملون الحل

جابها العام بالفاينل بس الحل مالتي هنا ال Vd مجرد اضربوها بالوزن لان كلياته طبيعي شغلها اني هنا حالته قبل ما ناخذ محاضرة ال digoxin

هاي ال mcq مال عام فاينل هي وحلها ضروري تقروها

سؤال جابه د.اثير مو نصا بس نفس هذا المفهوم بالضبط A patient is receiving vincristine, which is a known P-glycoprotein (P-gp) substrate. One of the following co-administered drugs is correctly adjusted to maintain therapeutic efficacy. Which of the following statements is most appropriate? A) Vincristine is given with ritonavir ; no dose adjustment is needed. B) Vincristine is given with St. John’s Wort; dose of vincristine is decreased to avoid toxicity. C) Vincristine is given with verapamil; dose of vincristine is increased to reach therapeutic levels. D) Vincristine is given with rifampin; dose of vincristine is increased to achieve therapeutic effect. الجواب D

التداخلات المهمه 2. Impact of Enzyme Inducers • Drugs like phenytoin, phenobarbital, and rifampin: • Increase clearance • Shorten half-life 3. Hepatic Impairment • Liver cirrhosis / acute hepatitis: • Reduced clearance due to loss of liver function 4. Lactation • Carbamazepine in breast milk: • Concentration is ~60% of concurrent serum level

هاي الفقره هواي جاب منها mcq بالفاينل خصوصا النسب

وهذا ارقام مال clearance ماتوقع مهمه كلش

صفحه 66 Carbamazepine – Metabolism, Autoinduction, and Dosage Titration 1. Epoxide Metabolite Ratios (% of Parent Drug): • Monotherapy: ~12% • + Phenobarbital: ~14% • + Phenytoin: ~18% • + Phenytoin & Phenobarbital: ~25% 2. Autoinduction: • Carbamazepine induces its own metabolism via hepatic enzyme induction (CYP450). • Autoinduction begins within a few days and stabilizes in 2-3weeks. 3. Titration Strategy: • Start with ¼ to ⅓ of maintenance dose. • Increase by ¼ to ⅓ every 2–3 weeks. • This gradual increase allows autoinduction to occur and prevents toxicity. • Evaluate therapeutic effect and steady-state levels 2–3 weeks after final titration. 4. Peak Plasma Concentrations: • Immediate-release: • Single dose: 2–24 hours • After autoinduction/multiple doses: ~3 hours • Sustained-release: 3–12 hours

ملخص carbamazepine صفحه 65 تفيدكم اذا حافظيها وتردون تراجعون الارقام Therapeutic and Toxic Concentrations 1. Therapeutic Range • 4–12 μg/mL when treating seizures. • >8 μg/mL: Some patients may already experience adverse effects even before reaching the toxic range. 2. Plasma Protein Binding • Normal Conditions: • Binds to albumin and α1-acid glycoprotein (AGP) • 75–80% bound, leaving 20–25% free (unbound drug) • Stress or Disease States (e.g., trauma, heart failure, MI): • AGP levels increase • Binding increases, leading to unbound fraction drop to 10–15% 3. Clinical Relevance of Binding • Despite high protein binding: • Displacement of carbamazepine by other drugs or disease-related changes rarely causes clinically significant effects due to strong binding stability 4. Adverse Effects at Higher Levels (>8 μg/mL): • Neurological and GI symptoms: • Nausea, vomiting • Lethargy, dizziness, drowsiness • Headache, blurred vision, diplopia • Unsteadiness, ataxia, incoordination

هاي مهمات درررخ كووومة اجة عليهم mcq مسائل بلمد

هذا رقم مال 50-100 هنا بدل mg خلو ml لان خطا بالشيت..

التحويلات من د رقيه

اهم الملاحظات وطرق حل المسائل والاشياء المهمة بالملزمة ال8

🤍Drug X and Z are known to have similar pharmacological effect. However. drug Z produces half of the biological response by a dose that is double? of drug X dose. Which of the following statements is (are ) false ✅Drug X is more potent that drug Z 🤍A Basic drug with a pKa of 8.7 ✅Will be predominantly unionized at plasma pH 🤍Patient on Amikacin , the ideal body weight is 65kg and the total body weight is 78 kg, the volume of distribution will be ✅20. 2L 🤍JM is an 80 yrs old , 80kg(5 ft 8 in)male with Streptococcus viridans endocarditis and is allergic to penicillins and ephalosporins.His current serum creatinine is1.5mg/dL. If CI vancomycin =0.695 (CrCl)+0.05 The value of vancomycin clearance will be ✅0.37 ml/ min / kg 🤍drug has elimination t1/2 of 3 hours and follow first order elimination kinetic If single 250mg dose is given to adult female patient(62kg) by rapid IVinjection Assuming apparent VD is 0.5 L/kg.the expected plasma drug concentration(C)at 8 hrs postdose is ✅1.25 mg/l 🤍Amikacin(500mg)was administered three times day for 65kg female patient by intermittent IV infusion for7days maximum and minimum plasma conc 40 and 5mg/L respectively elimination rate constant of amikacin 0.3 hr- 1 it is expected that an infused over ✅60 min 🤍The bioavailability of Amikacin post IM injection in obese patients is low because of ✅accumulation of fat in gluteal muscle 🤍Hepatic diseases such as hepatitis and cirrhosis can significantly affect the pharmacokinetics of drug. In this context , all the following are true EXCEPT ✅The volume of distribution is decreased 🤍Warfarin is highly bound to plasma protein The co - administration of a drug that could displace warfarin from plasma protein binding could lead to all the following EXCEPT ✅The ration of plasma to tissue concentrations warfarin will not be affected 🤍All the following statements regarding dialysis are true EXCEPT ✅Drugs with high volume of distribution need replacement doses 🤍Colchicine was prescribed orally to 50 yrs old male to treat gout Colchicine is metabolised by CYP3A4 I,and patient was taking clarithromycin to treat atypical pneumonia.The co-administration of colchicine and clarithromycin can cause the ✅Clarithromycin can decrease the firstpass metabolism of colchicine 🤍Which one of the following changes may occur for Gentamicin in patients with cystic fibrosis ✅Increased volume of distribution 🤍In regards to bioavailability, all of the following statements are true EXCEPT ✅Drugs with high plasma protein binding have more bioavailability than low binding drugs 🤍For good antibacterial activity,peak MIC ratio of Amikacin is better to be ✅10:1 🤍partial agonist can antagonize the effects of a full agonist because it has ✅High affinity but low intrinsic activity 🤍The best way to minimize the accumulation of aminoglycosides in tissues is ✅Using single daily dose regimen 🤍Verapamil is extensively metabolized by the liver. Which of the following is? true for verapamil metabolism ✅As the fraction of unbound verapamil in blood increases as hepatic clearance increased 🤍It is expected that diseases can affect the pharmacokinetica Which of the following conditions is incorrtect ✅Vd of digoxin is decreased in case of renal dysfunction due displacement from plasma Proteins

1) The maintaining plasma or blood drug concentrations within a target range the pharmacokinetics variation is all except A. Difference age B. Phscological✅ C. Drug interactions D. Cardiac  disease 2. Loading dose determine by A. Bioavailability B. Half life C. Volume distribution ✅ Clearance 3. The parameters important for state state plasma concentration is A. Bioavailability B. Half life C. Volume distribution Clearance ✅ 4. All is flase  about PGP except:- - it is active transport 5. Regarding to Amino glycosides all is true except - the Nephrotoxicity cause by peak plasma concentration 6. Regarding to vancomycin all is flase except :- - peak Plasma concentration association wit  Otoxicity 7. The patient was taken overdose of phenobarbital it admissions to hospital and it required immediately treatment which possabe more convenient way to treatment this patient - alkalinization of urine 8.Drug X and Z are known to have similar pharmacological effect.  However,drug Z produces half of the biological response by a dose that is  double of drug X dose , Which of the following statements is(are) false a) Drug X is more effective than drug Z. ✅ b) Drug X is less effective than drug Z. c) Drug X is less potent than drug Z. d) Drug X is more potent that drug Z. e) Drug X and drug Z have similar efficacy. 9. Regarding to drug absorption is depends in all except: A. Effect of PH & ionization B. Surface area C. Blood flow D. Contact time at the absorption surface Environment in different parts of the gastrointe✅ اتوقع E. Lipophilicity 10.For which drugs is monitoring helpful? A.Marked pharmacokinetic variability B. Concentration related therapeutic and adverse effects C. Narrow therapeutic index D. Defined therapeutic (target) concentration range • All of above✅ 11. Q:Colchicine was prescribed orally to a 50-years old male to treat gout.  Colchicine is metabolised by CYP3A4. In addition, the patient was taking  clarithromycin to treat atypical pneumonia. The co-administration of  colchicine and clarithromycin can cause the following? a) Optimization of doses is not required. b) The plasma concentration of colchicine could exceed the minimum toxic  level. c) Renal clearance is significantly affected. d) Clarithromycin can decrease the first-pass metabolism of colchicine. e) The elimination half-life of colchicine will be extended. 12) regarding to phenobarbital which is false - The hemodialysis remove 30% 13) the best way for modifying carbamazpine dose - decrease or increase 10%-20% 14) the cystic fibrosis all for following is true except - Vd is decrease 15. The dose of phenobarbital required for ttt of status epilepticus is - 15- 20 16) regarding to administration of drug with PGP inhibitor which of following is true - increase the Cmax of drug 17. Regarding to administration of drug X with ketocanzole which is true - The theraputic effect & toxicity may occur✅ 18. Q:All of the following effects on PK parameters are anticipated EXCEPT: a) The bioavailability of verapamil is decreased if co-administered with  fluconazole.  ✅ b) Acidification of urine decreases the clearance of renally-excreted weak  acidic drugs. c) The elimination rate constant is decreased if hepatic enzymes are  inhibited. d) Displacement of a drug from tissue binding proteins decreases its volume  of distribution. e) High plasma-protein bounding decreases the distribution of drugs. 19. The drug has PH=8.9 which is true - drug may presentation in un-dissociate form in plasma 20. Carbamazpine mainly excret by - Hepatic pathway 21. The digoxin is excreted mainly in change by urine by about -75 % 22. All side effects of phenobarbital except - marlgia 23- drug increase the Concentration of carbamazpine is all except 24. The carbamazpine % which is not correct - it % with phenytoin+ phenobarbital=32% 25- phenobarbital clearance for old patient is - 4mL/h/kg