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Hypothyroidism
Hypothyroidism - Pharm for Nursing
| Question | Answer |
|---|---|
| Mechansim of Action | Induce changes in Metabolic rate,increase O2 consumption, Body Temp, BVolume, Overall cellular growth and differentiation, stimulate CV system by ↑ sthe sensitivity of heart to catecholamines and ultimately ↑ CO. |
| Indications | Used to diagnose hyperthyroidism, prevention / treatment of various goiters, replacement Hormone therapy, Pt. who have had thyroid removed/destroyed. |
| Contraindications | Allergy, Recent MI, Adrenal Insufficiency, hyperthroidism. |
| Adverse Effects - CV | TachyC, palpitation, angina, dysrhymia w/ life fatal irreg., hptertension, cardiac arrest |
| Adverse Effects - CN | Insomnia, tremors, headache, anxiety |
| Adverse Effects - GI | Nausea, diarrhea, I/D in appetite, cramps |
| Adverse Effects - other | Menstrual Irreg., Decrease weight, sweating, heat intolerance, fever. |
| Interactions with Anticoagulants | inhance anticoagulant effect. |
| Interactions with Digitalis Glycoside | Decrease Digitalis levels |
| Interactions with Cholestyramine | binds to thyroid hormone in GI, decrease absorption of both drugs |
| Interactions with Diabetics | May require Pt. dose to ↑. |
| Interactions with Epinephring | Pt. with coronary disease, may induce coronary insufficencies. |
| Levonthyrovine (Synthroid, Levoxyl) | Synthetic Levonthyrovine (thyroid hormone T4) Orals for Hypothyroidism, IV for Myxedema |
| Levonthyrovine | 1/2 Life 9-10 days, Peak 3-4 weeks. risk for toxicity |
| Toxicity of Levonthyrovine | Manifest by Decrease Weight, TachyC, nervousness, tremors, headache, insomnia, menstral irreg., Cardiac irreg. 99% protien bound so it stays in body longer increasing risk of toxicity. |
| Liothyronine (cytomel, Triostat) | Synthetic Liothyronine (thyroid hormone T3) |
| Liotrix (Thyrolar) | Synthetic Thyroid hormone T3-T4 combination |
| Thyroid (Armour, Thyroid, S-P-T) | Dessicated animal thyroid gland. |