Exam 4 Flashcards

1
Q

Steroid Drugs

A

Hydrocortisone
Prednisone
Dexamethasone
Fludrocortisone
Spironolactone

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2
Q

Hormone Type of Adrenal Medulla

A

Epinephrine

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3
Q

Hormone Types of Adrenal Cortex

A

Corticosteroids and androgens

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4
Q

Hormone of Cortical Zona Glomerulosa

A

Aldosterone

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5
Q

Hormones of Cortical Zona Fasciculata and Zona Reticularis

A

Cortisol and androgens

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6
Q

Zones of the Adrenal Cortex from Shallow to Deep

A

Glomerulosa
Fasciculata
Reticularis

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7
Q

Glucocorticoid General Function

A

Metabolic effects
Anti inflammatory

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8
Q

Mineralocorticoid General Function

A

Salt and water retention

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9
Q

Cortisol Synthesis General Pattern

A

Synthesized as need and not stored
Secreted in response to stress
Released daily in the AM

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10
Q

Cortisol Feedback Pattern

A

Negative feedbacks corticotropin releasing factor in the hypothalamus
Negative feedbacks ACTH in the anterior pituitary

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11
Q

Primary Glucocorticoid Metabolic Effects

A

Increase in glucose
Increase in muscle breakdown
Fat redistribution

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12
Q

Glucocorticoid Cardiovascular Effects

A

Salt and water retention
Increase in cardiac output
Augments epinephrine vasoconstriction

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13
Q

Additional Glucocorticoid Effects

A

Inhibits vitamin D to decrease body Ca2+
Stimulates gastric acid
Altered neuronal function
Inhibits growth
Induces fetal lung surfactant

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14
Q

Triggers of Aldosterone Effects

A

Low blood volume
High K+

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15
Q

Mineralocorticoid Effects

A

Increased Na+ and water retention
Increased K+ and H+ excretion
CV issues with Na+ retention
K+ and pH issues

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16
Q

Pathology of Glucocorticoid Toxicity

A

Cushingoid symptoms

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17
Q

Pathology of Steroid Withdrawal

A

Addisonian crisis

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18
Q

Treatment of Cushing Symptoms

A

Ketoconazole

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19
Q

Steroid Site of Molecular Action

A

Nuclear transcription factor receptors

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20
Q

General Protein Binding of Steroid Drugs

A

HIGH except dexamethasone

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21
Q

Drug of Choice for People Who Cannot Make Cortisol

A

Hydrocortisone

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22
Q

Chemical Structure of Glucocorticoid Selectivity

A

16 carbon substitution

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23
Q

Chemical Structure of Glucocorticoid Selectivity

A

17 carbon OH group

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24
Q

Chemical Structure of Increased Steroid Potency

A

9 carbon fluorine

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25
Hydrocortisone Usage
Hormone Replacement
26
Hydrocortisone Pharmacokinetics
Orally and IV Effective 8 to 12 hour duration
27
Prednisone Pharmacokinetics
Partially selective for glucocorticoid receptors Orally and IV effective 18 to 36 hour duration
28
Dexamethasone Use
STRONG anti inflammatory effects VERY POTENT LONG duration of action 36 to 54 hours
29
Fludrocortisone Use
Hormone replacement therapy for adrenal failure and 21 hydroxylase deficiency
30
Spironolactone Mechanism of Action
Mineralocorticoid ANTAGONIST
31
Spironolactone Uses
K+ sparing diuretic Uses for aldosterone secreting tumors
32
Spironolactone Unique Adverse Effect
Gynecomastia
33
Receptor of Steroid Anti inflammatory Effect
Glucocorticoid receptor
34
Receptor Selectivity and Mineralocorticoid Side Effects
More glucocorticoid receptor selectivity reduces these
35
Duration, Dose, and Safety of Corticosteroid Therapy
Short term high dose therapy is safe Long term low does therapy is safe
36
Steroid Dose Pattern
2/3 in the AM and 1/3 in the PM
37
Thyroid Supplements and Inhibitors
Levothyroxine Liothyronine Methimazole Propylthiouracil Potassium Iodide Radioactive Iodine
38
Thyroid Hormone Synthesis Location
Follicular cells of thyroid gland Stores about a 3 month supply
39
Two Active Thyroid Hormones
More Potent Triiodothyronine T3 Thyroxine T4 converted in the body to active T3
40
Rate Limiting Step of Thyroid Hormone Synthesis
Conversion of I- into I2 by thyroid peroxidase
41
Hypothyroidism First Line Treatment
Diet
42
Levothyroxine Structure
Identical to endogenous T4
43
Thyroid Hormone Receptor
Nuclear transcription factor receptor Similar to glucocorticoid receptor
44
Levothyroxine Pharmacokinetics
Orally available Converted to T3 in the body Full agonist Slow onset but long duration
45
Levothyroxine Protein Binding
HIGH
46
Levothyroxine Usage
Oral IV in myxedema coma Feedback suppression of TSH in thyroid cancers Hormone replacement after thyroid surgery
47
Liothyronine Pharmacokinetics
Orally available Already T3 Full agonist More potent and rapid acting 4 times more potent than levothyroxine
48
Liothyronine Uses
Rapid onset for replacement after surgery Rapid onset for replacement after radioiodine treatment
49
Thyroid Hormone Therapy Considerations in the Elderly and Heart Patients
Start low go slow
50
Thyroid Hormone Considerations in Pregnancy
Safe in pregnancy Treat patients until slightly hyperthyroid
51
Thyroid Drug Interactions
Anything that depletes thyroid hormone Warfarin because levothyroxine accelerates degredation of vitamin K dependent clotting factors Increased cardiac response to catecholamines
52
Thioamides
Methimazole Propylthiouracil
53
Thioamides Mechanism of Action
Inhibit thyroid peroxidase DO NOT Inhibit release of preformed thyroid hormone
54
Thioamides Pharmacokinetics
Orally absorbed Rapidly cleared from circulation Concentrated in thyroid so longer duration of action than plasma half life Metabolism through conjugation and urine excretion
55
Thioamides Side Effects
Agranulocytosis Rash Muscle and joint aches Hypothyroidism if dose too high
56
Methimazole Specific Pharmacokinetics
Longer half life and duration of action Higher potency
57
Methimazole Specific Side Effects
Fetal side effects DO NOT USE IN 1st TRIMESTER
58
Propylthiouracil Specific Use
Inhibits conversion of T4 to T3 Use to treat thyroid storm Preferred drug in 1st trimester of pregnancy
59
Propylthiouracil Specific Pharmacokinetics
Shorter half life
60
Potassium Iodide Usage
Protects thyroid from damage by radioactive iodine
61
Iodides Effects
Acute inhibition of synthesis and release of thyroid hormone Decreases vascularity of gland
62
Iodides Uses
Sort term suppression Thyroid storm Pre op about 10 days before surgery
63
Iodides Adverse Effects
Rash Diarrhea Brassy taste Oral irritation
64
Radioactive Iodine Mechanism of Action
85% beta radiation for localized therapeutic tissue destruction 15% gamma radiation for imaging and cancer diagnosis
65
Radioactive Iodine Small Dose Effect
Hyperthyroidism diagnosis Localization of metastatic thyroid cancers General assessment of thyroid anatomy
66
Radioactive Iodine Large Dose Effect
Localized destruction of thyroid gland
67
Radioactive Iodine Contraindications
Pregnancy Breastfeeding Young children
68
Treatment of Thyroid Storm
Iodides Propylthiouracil Glucocorticoids Propranolol
69
Type 2 Diabetes Drugs
Glimepiride Pioglitazone Rosiglitazone Exenatide Canagliflozin Metformin Pramlintide Acarbose Sitagliptin
70
Common Side Effect of Drugs That Cause Insulin Release
Hypoglycemia
71
Blood Sugar Control in Pregnancy and Surgery
Use insulin
72
Sulfonylureas
Glimepiride
73
Sulfonylurea General Mechanism
Cause more insulin release
74
Steps of Homeostatic Insulin Release
Glucose flows into beta cell through GLUT 2 Glucose is used to make ATP ATP closes K+ channels Cell depolarizes and opens voltage gated Ca2+ channels Ca2+ causes exocytosis of insulin containing vesicles
75
Sulfonylurea Specific Mechanism
Block ATP sensitive K+ channels so cell stays depolarized for longer More insulin gets released
76
Sulfonylurea Pharmacokinetics
Well absorbed Slowed by food Protein bound
77
Sulfonylurea Metabolism
Metabolized by liver and excreted by kidney Excreted by BOTH urine and bile
78
Sulfonylurea Adverse Effects
Hypoglycemia Weight Gain Occasional GI, skin, liver, and blood issues
79
Sulfonylurea Contraindications
Liver or kidney disease Some may cause balance issues in the elderly
80
Metformin Drug Class
Biguanide Only drug in class
81
Metformin Mechanism
Works in the liver to decrease glucose production and increase glucose uptake No action on insulin so NO RISK OF HYPOGLYCEMIA
82
Metformin Pharmacokinetics
Oral Taken 2 to 4 times per day after meals Well absorbed and not protein bound Excreted UNCHANGED IN URINE
83
Metformin Cautions
May build up to dangerous levels in patients with kidney disease Patients must be well hydrated due to renal excretion
84
Metformin Adventages
Does not cause hypoglycemia or weight gain
85
Metformin Adverse Effects
Lactic acidosis especially in kidney disease and alcohol intake GI irritation
86
Acarbose Drug Class
Alpha glucosidase inhibitor
87
Acarbose Mechanism
Inhibit enzymes that break down sugars in the gut
88
Acarbose Usage
Take 30 minutes before each meal Usually used in combination with other drugs
89
Acarbose Adverse Effects
Can cause hypoglycemia ONLY when combined with other drugs Only glucose will treat hypoglycemia with this drug, OTHER SUGARS WILL NOT WORK GI effects AVOID WITH METFORMIN DUE TO GI ISSUES
90
Thiazolidinediones
Pioglitazone Rosiglitazone
91
Thiazolidinedione Suffix
“glitazone”
92
Thiazolidinedione Mechanism
Binds and activates PPAR gamma nuclear transcription factor receptor Enhances transcription of insulin responsive genes Helps endogenous insulin work better
93
Thiazolidinedione Specific Mechanisms
Decrease gluconeogenesis, glucose output, and triglyceride synthesis in liver Increase glucose uptake in muscle Increase glucose uptake and decreases fatty acid production in adipocytes OVERALL EFFECTS LIVER, MUSCLE, AND FAT
94
Thiazolidinedione Pharmacokinetics
Oral Taken with food once per day Metabolized by liver and excreted in bile Subject to enterohepatic recirculation
95
Thiazolidinedione Adverse Effects
Liver toxicity Edema which can lead to heart problems Bone fractures Weight gain
96
GLP 1 Agonists
Exenatide
97
GLP 1 Agonist Mechanism
GLP 1 analogs that increase insulin secretion and decrease glucagon Slow gastric emptying to promote satiety
98
GLP 1 Agonist Usage
Alone or in combination with insulin or other drugs Injected subQ
99
GLP 1 Agonist Adverse Effects
Nausea Hypoglycemia Pancreatitis
100
GLP 1 Agonist Drug Interactions
Alters absorption of antibiotics and contraceptives
101
DPP 4 Inhibitors
Sitagliptin
102
DPP 4 Inhibitor Mechanism
Inhibit the breakdown of endogenous GLP 1
103
DPP 4 Adverse Effects
No effect on weight Respiratory infections
104
SGLT 2 Inhibitors
Canagliflozin
105
SGLT 2 Inhibitor Mechanism
Blocks glucose resorption in the kidneys to increase excretion
106
SGLT 2 Inhibitor Adverse Effects
Hypotension so good for treating hypotension but can become dangerous UTIs Fractures
107
Will Type 1 Diabetes Always Require Insulin?
YES!
108
Administration Route For All Insulin Preparations
Injection
109
Insulin Cell Surface Receptor
Tyrosine kinase receptor
110
Insulin Tyrosine Kinase Receptor Mechanism of Action
Phosphorylation cascade leads to translocation of glucose transporters into the cell membrane
111
Important Pharmacokinetic Differences of Different Insulin Preps
Onset Peak Duration
112
Regular Insulin Pharmacokinetics
Rapid or short acting Onset 30 min to 1 hr Peak 2 to 4 hrs Duration 5 to 6 hours
113
Isophane Insulin NPH Structural Differences
Complexed with protamine at neutral pH Suspension and not solution
114
Isophane Insulin NPH Pharmacokinetics
Onset 1 to 2 hrs Peak 6 to 12 hrs Duration 18 to 24 hrs
115
Isophane Insulin NPH Administration
CANNOT be given IV
116
Isophane Insulin NPH Usage
Sustained insulin effect between meals
117
Rule for Drawing Regular Insulin and Isophane Insulin NPH in the Same Syringe
Clear before cloudy
118
Rapid Acting Insulin Analogs
Lispro Aspart Glulisine
119
Slow and Long Acting Insulin Analogs
Glargine Detemir Degludec
120
Insulin Lispro Usage
Injected right before a meal Less risk of hypoglycemia from missed meals Less risk of hypoglycemia after a meal
121
Insulin Lispro Pharmacokinetics
Peak 30 min Duration 3 to 4 hrs
122
Insulin Aspart Pharmacokinetics
Similar onset to lispro Longer duration than lispro
123
Insulin Glulisine Usage
For use before or immediately after a meal
124
Insulin Glargine Pharmacokinetics
Long, low, constant activity over 24 hrs Peakless or flat activity
125
Insulin Glargine Chemistry
Soluble at pH 4 so precipitates in blood
126
Insulin Detemir Structure
Fatty acid chain myristic acid allows it to bind to plasma albumin for a controlled release
127
Insuline Detemir Pharmacokinetics
More consistent absorption than glargine Shorter action than glargine
128
Insulin Degludec Structure
Fatty acid chain promote aggregation of insulins and slows release
129
Insulin Degludec Pharmacokinetics
Long acting over 42 hrs
130
Standard Basal Plus Bolus Insulin Treatment
Short acting insulin before meals Long acting insulin before bed
131
Insulin Adverse Effects
Hypoglycemia with missed meals, exertion, or if insulin dose is too high
132
Treatment of Hypoglycemia
Juice, candy, honey for mild Glucose preparations for more severe Glucagon injection if unconscious
133
Propranolol in Diabetes
Masks the sympathetic symptoms of hypoglycemia
134
Pramlintide General Mechanisms
Helps insulin work better Slows gastric emptying
135
Pramlintide Usage
Decreases postprandial glucose Only used with insulin Decreases need for insulin
136
Estrogen Drugs
Estradiol Conjugated Estrogens Ethinyl Estradiol
137
Progestin Drugs
Progesterone Medroxyprogesterone Acetate Norethindrone
138
Selective Estrogen Response Modifiers
Tamoxifen Raloxifene
139
Native Hormone Pharmacokinetics
Poor oral bioavailability Metabolized by the liver
140
Progestins Function
PROmote GESTation
141
Safety Timeline of Estrogen Monotherapy
Only safe in hypogonadism before and right at puberty
142
Estradiol Usage
Hormone replacement therapy Hypogonadism
143
Estradiol Structure
Identical to endogenous estrogen
144
Conjugated Estrogen Usage
Hormone replacement therapy
145
Conjugated Estrogen Structure
Estrogen conjugated with sulfate
146
Ethinyl Estradiol Usage
Oral combined contraceptives
147
Ethinyl Estradiol Structure
Ethinyl group increases oral bioavailability, slows clearance, and increases potency
148
Estrogen Adverse Effects
Nausea Edema Cholestatis Insulin resistance Increased blood clotting
149
Estrogen Cancer Risk
Increased risk of endometrial cancer which is reduced by progestins
150
Progestin Uses
Replacement therapy with estrogen in menopause Birth control Uterine bleeding Endometriosis
151
Progestin Adverse Effects
Menstrual changes Nausea Bloating
152
Nor progestin Adverse Effects
Masculinization Worsened lipid profile
153
Most Common Menopause Hormone Replacement
Conjugated estrogens with medroxyprogesterone
154
Synthetic Menopause Hormone Replacements
Ethinyl estradiol with norethindrone
155
Benefits of Hormone Replacement in Menopause
Reduction of osteoporosis Reduction in colorectal cancer May protect against Alzheimers
156
Risks of Long Term Hormone Replacement in Menopause
Increased breast cancer risk Increased risks of hear disease and stroke
157
Nor progestins
Norethindrone
158
Nor progestin Advantages
Orally effective
159
Selective Estrogen Response Modifier General Function
Can act as an estrogen agonist or antagonist depending on the tissue
160
Raloxifene Uses
Treatment of postmenopausal osteoporosis Prevention of breast cancer
161
Raloxifene Adverse Effects
Hot flashes due to antagonist effects Thromboembolism due to agonist effects
162
Tamoxifen Usage
Treatment of ER+ advanced and metastatic breast cancer Breast cancer prevention
163
Tamoxifen Adverse Effects
Uterine cancer due to agonists effects Thromboembolism due to agonist effects
164
Contraceptive Drugs
Ethinyl Estradiol Norethindrone Norethynodrel Levonorgestrel Norgestimate Drosperinone Etonogestrel DMPA Ulipristal
165
Progestin Effect of Oral Contraceptives
Suppresses GnRH from hypothalamus which prevents FSH and LH release which stops the luteal surge
166
Estrogen Effect of Oral Contraceptives
Suppresses FSH release thus blocks folliculogenesis
167
Secondary Effects of Oral Contraceptives
Progestin thickens cervical mucous
168
Norethindrone and Levonorgestrel Unique Properties
Sometimes androgenic
169
Norethynodrel Unique Properties
Estrogenic and not androgenic
170
Norgestimate Unique Properties
Not androgenic or estrogenic A pure progestin
171
Drospirenone Unique Properties
Anti androgenic Anti mineralocorticoid receptor actions Can cause hyper K+
172
Etonogestrel Unique Properties
Newer progestin
173
Oral Contraceptive Prep for Breakthrough Bleeding
Higher progestin
174
Oral Contraceptive Prep for Heavy Menstrual Bleeding
Lower estrogen
175
Oral Contraceptive Preps to Reduce Risk of Masculinization
Norethynodrel Norgestimate Drosperinone
176
Continuously Active 365 Birth Control Prep
Ethinyl Estradiol with Levonorgestrel
177
One Missed Oral Contraceptive Dose Protocol
Take the pill ASAP
178
Two or more consecutive Missed Oral Contraceptive Doses Protocol
Resume taking pills as normal with backup contraception for at least 7 days
179
Discontinuation of Oral Contraceptives
Normal menstruation and fertility should return to normal in 30 days If does not return to normal after 90 days evaluate for other medical issues
180
Oral Contraceptive Absolute Contraindications
Pregnancy Estrogen Responsive Tumors Tobacco smoking in 35 or older
181
Oral Contraceptive Relative Contraindications
Thromboembolic disease Heart disease Diabetes Hypertension Liver disease
182
Oral Contraceptive Drug Interactions
MANY due to lipid solubility Anti seizure medications Phenytoin and Carbamazepine Rifampin
183
Oral Progestin Contraceptive Effectiveness
Less effective than combined drugs
184
Norethindrone Contraceptive Usage
Taken continuously
185
Oral Progestin Contraceptive Mechanism
Thicker cervical mucous
186
Drosperinone Contraceptive Usage
Taken 24/4 May be more effective than norethindrone
187
Levonorgestrel Administration
IUD
188
DMPA Administration
Injection
189
Etonogestrel Administration
Subdermal implant
190
DMPA Unique Effects
Loss of bone density Takes a year after discontinuation for fertility to return
191
Levonorgestrel Usage
Use as emergency contraceptive up to 72 hours after unprotected sex Available OTC
192
Antianginals
Nitroglycerin Nifedipine Verapamil Metoprolol
193
Erectile Disfunction Drug
Sildenafil
194
Trigger of Angina Pectoris
Oxygen demand exceeds oxygen supply
195
Chronic Stable Angina
Angina with a given amount of exercise
196
Unstable Angina
Angina at rest with increased frequency and duration
197
Silent Angina
Most common angina Asymptomatic
198
Vasospastic Angina
Rare spasms of coronary arteries More common in young people and smokers
199
Angina Pharmacological Therapy Goals
Immediate relief AND prophylaxis Increased exercise tolerance
200
Angina Pharmacological Therapy General Mechanism
Reduction of myocardial oxygen demands
201
Angina Pharmacological Therapy Drug Classes
Organic nitrates Ca2+ Channel Blockers Beta Blockers
202
Coronary Profusion in Systole and Diastole
Coronary arteries profuse during diastole Prolonging diastole increases coronary blood flow
203
Nitroglycerin Mechanism
Prodrug releases NO when metabolized by ALDH 2 Overall supplements endothelial production of NO Dilates veins to reduce preload and myocardial oxygen demand
204
Nitroglycerin Effect on Coronary Arteries
MINIMAL because they are already maximally dilated DOES directly dilate vasospastic coronary arteries
205
Higher Dose Nitroglycerin Cardiovascular Effects
Reflex tachycardia Dilation of arterioles in the face, neck, and meninges
206
Nitroglycerin Pharmacogenomics
Low activity of ALDH 2 which reduces the efficacy of nitroglycerin More common in Asian people
207
Sublingual Nitroglycerin Pharmacokinetics
Achieves therapeutic levels in under a minute for rapid relief 1 hour duration of action Contact EMS if no relief 5 minutes after first dose
208
Nitroglycerin Tolerance
Can happen within 24 hours Nitroglycerin permanently inhibits ALDH 2 Common with oral and transdermal routes Avoid with nitrate free intervals of 10 to 12 hours
209
Nitroglycerin Adverse Effects
Headache Orthostatic hypotension Reflex tachycardia
210
Nitroglycerin Drug Interactions
Vasodilators like PDE 5 inhibitors and alpha blockers Alcohol
211
Ca2+ Channel Blockers
Dihydropyridines such as Nifedipine Heart rate lowering Verapamil
212
Ca2+ Channels Blockers Mechanism
Blocks L type Ca2+ channels in vascular smooth muscle, cardiac myocytes, and pacemaker cells Overall dilates arteries to reduce afterload Useful in vasospastic angina
213
Ca2+ Channel Blockers Efficacy
Prophylaxis to reduce need for nitroglycerin Equally efficacious as beta blockers but no increase of survival
214
Nifedipine Unique Properties
More active in vascular smooth muscles than in myocardium Metabolized by CYP 3A4 so AVOID GRAPEFRUIT JUICE
215
Verapamil Unique Properties
More active in myocardial and pacemaker cells Less potent than dihydropyradines Short half life
216
Verapamil Contraindications
Sick sinus syndrome AV Nodal Block
217
Ca2+ Channel Blocker Other Uses
First line for hypertension Pulmonary arterial hypertension Cardiac arrhythmias
218
Ca2+ Channel Blocker Adverse Effects
Bradycardia in heart rate lowering drugs Reflex tachycardia in dihydropyradines Headache, flushing, dizziness in dihydropyradines GERD Constipation in heart rate lowering drugs
219
Beta 1 Selective Blockers
Metoprolol
220
Beta 1 Selective Blocker Mechanism
Decrease heart rate, contractile force, and afterload to decrease myocardial oxygen demand Increased profusion in diastole No effect on resting heart rate
221
Beta Blocker Adverse Effects
DO NOT USE IN VASOSPASTIC ANGINA Increased airway resistance ACUTE MI ON SUDDEN WITHDRAWAL Exercise intolerance
222
Beta Blocker Drug Interactions
Avoid with partial beta 1 agonist drugs Avoid with heart rate lowering Ca2+ channel blockers
223
Erectile Disfunction Medication
Sildenafil
224
Sildenafil Mechanism of Action
Selective PDE 5 inhibition Prolongs action of cGPM in penile erectile tissue and lungs Only works with sexual stimulation Only works with intact innervation
225
Sildenafil Pharmacokinetics
Taken 1 hour before sexual activity 1 hour onset 2 to 4 hour duration Metabolized by CYP 3A4
226
Sildenafil Other Usage
Pulmonary hypertension
227
Sildenafil Adverse Effects
Headache and flushing Abnormal vision Dyspepsia Sudden hearing loss Priapism
228
Sildenafil Drug Interactions
Organic Nitrates Alpha Blockers
229
Antihypertensive Medications
Chlorthalidone Captopril Losartan Nitroprusside Hydralazine Minoxidil
230
Second Function of Angiotensin Converting Enzyme
Inactivates the vasodilator bradykinin
231
Normal Blood Pressure
Under 120/80
232
Elevated Blood Pressure
120 to 129/<80
233
Stage 1 Hypertension
130 to 139/80 to 89
234
Stage 2 Hypertension
>140/>90
235
First Line Hypertension Monotherapies
Thiazide Diuretics ACE Inhibitors or Angiotensin Receptor Blockers BUT NOT BOTH Calcium Channel Blockers
236
Second Line Hypertension Medications
Higher doses or different combos of first line therapies
237
Third Line Hypertension Medications
Vasodilators Beta Blockers Other drugs
238
Thiazide Diuretics
Chlorthalidone
239
Thiazide Diuretic General Mechanism
Rids Na+ from the body thus decreases blood volume Short term compensatory increase in total peripheral resistance Drop in total peripheral resistance 6 to 8 weeks later
240
Thiazide Diuretic Usage
Best in mild to moderate hypertension
241
Drug Synergy in Thiazide Diuretics
ACE inhibitors or ARBs can prevent the initial increase in blood pressure
242
Thiazide Diuretic Adverse Effects
Hypokalemia corrected with low Na+ diet Hyponatremia and Hypercalcemia Gout, hyperglycemia, and hyperlipidemia Erectile Dysfunction
243
ACE Inhibitors
Captopril
244
ACE Inhibitor Mechanism
ACE inhibition lowers concentration of angiotensin II Inhibits degradation of endogenous vasodilator bradykinin
245
Extra Pharmacological Effects of ACE Inhibitors
Increases renin Increases angiotensin I Decreases release of aldosterone through inhibition of AT 1 receptors in adrenal cortex Prevents and reversed vascular remodeling in the heart
246
ACE Inhibitor Pharmacokinetics
Taken orally once or twice per day Cleared by kidneys
247
ACE Inhibitor Usage
First line therapy in hypertension Improves survival overall
248
ACE Inhibitor Adverse Effects
Hypotension Dry Cough Angioedema Hyperkalemia Reduced GFR in bilateral renal stenosis patients Unsafe in pregnancy
249
Angiotensin Receptor Blockers
Losartan Other Sartans
250
Angiotensin Receptor Blocker Mechanism
Blocks Ang II AT I receptor but not AT 2 receptor Decreases TPR and secretion of aldosterone
251
Angiotensin Receptor Blocker Adverse Effects
Hyperkalemia Decreased GFR Unsafe in pregnancy
252
Nitroprusside Mechanism
Decomposes to NO in circulation Dilated BOTH veins and arteries Tolerance DOES NOT DEVELOP
253
Nitroprusside Usage
IV infusion to control high blood pressure in hospital patients Hypertensive emergency
254
Nitroprusside Adverse Effects
Excessive hypotension Cyanide Toxicity Methemoglobinemia
255
Hydralazine Mechanism
Arteriolar dilation of unknown mechanism
256
Hydralazine Metabolism
N acetylation by NAT 2 in liver Consider genetic fast and slow acetylators
257
Hydralazine Usage
Resistant Hypertension Hypertensive crisis Congestive heart failure and hypertension comorbidity
258
Hydralazine Adverse Effects
Reflex tachycardia Flushing and headache Lupus like syndrome
259
Minoxidil Mechanism
Opens K+ channels on vascular smooth muscle which dilates arteries
260
Minoxidil Usage
Seldom used due to adverse effects Add on for resistant hypertension Topical for male pattern baldness
261
Minoxidil Adverse Effects
Severe Edema Pericardial Effusion and Tamponade Reflex tachycardia Hypertrichosis