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Pharmacology
Pharmacology for the PT
| Drug | Uses | Mechanism of Action | Rehab Concerns |
|---|---|---|---|
| Acetaminophen | Analgesic & antipyretic; NOT anti-inflammatory | inhibits prostaglandins in CNS only | gastroc irritation, renal and hepatic toxicity |
| Glucocorticosteroids | Anti-inflammatory (systemic and in airways) | inhibit prostaglandins | catabolic effects, adrenocortical shock |
| Diuretics | HTN and Congestive Heart Failure | increase excretion of water | depletion of electrolytes, orthostatic hypotension, weakness/fatigue |
| Beta-Blockers (-olol) | HTN, arrhythmia, angina, heart failure, MI (decrease HR and force of contraction) | Block effects of epinephrine & norepinephrine (adrenergic blocker) | Bronchoconstriction, orthostatic hypotension, decrease exercise capacity |
| Vasodilators | HTN & Heart failure | cause vasodilation of vascular structures | Postural hypotension, reflex tachycardia, dizziness, edema/fluid retention |
| ACE inhibitors (-pril) | HTN & Heart failure | decrease formation of AngII (which causes vasoconstriction), therefore causing vasodilation | dry cough, dizziness, allergic reaction |
| Calcium Channel Blockers (-ipine) | HTN, angina, arrythmia | limit calcium entry into muscle; promote vasodilation | peripheral edema, altered HR, orthostatic hypotension, risk of MI |
| Heparin | Anticoagulant | increase effects of antithrombin II | Hemorrhage |
| Warfarin | Anticoagulant | inhibit vitamin K (which synthesizes klotting factors) | Hemorrhage |
| Thrombolytics | Used 3-6 hours post MI or 3 hours post ischemic stroke (NOT post hemorrhagic stroke) | break down clot to restore blood flow | Hemorrhage |
| Clotting Factor Replacement | Clotting deficiencies (hemophilia) | inhibit clot breakdown | Increased clotting |
| Statins | Hyperlipidemia | inhibit enzymes that make cholesterol | myalgia (rhabdomyalysis), nausea, liver toxicity, pancreatitis, arrhythmia, weakness, parasthesia |
| Fibric Acids | Hyperlipidemia | decrease triglycerides and increase VLDL | myalgia (rhabdomyalysis), nausea, liver toxicity, pancreatitis, arrhythmia, weakness, parasthesia |
| Antitussives (Codine) | Cough suppressants | suppress cough reflex and cause anesthesia | Sedation, GI upset, dependence, limit productive cough |
| Decongestants | Sinus congestion | Alpha-1 agonists (adrenergic agonists); vasoconstrict nasal mucosa | Palpitations, headache, nausea, dependence, nervousness |
| Mucolytics | Respiratory mucus; beneficial during P&PD | break-up muco-bonds | No major concerns |
| Expectorants | Respiratory congestion; beneficial during P&PD | increase ejection of phlegm | No major concerns |
| Anti-histamines | Allergies | block effects of histamine | Sedative, incoordination |
| Beta-adrenergic agonists | Bronchodilation (Asthma); beneficial during P&PD | stimulate beta-2 receptors and cause relaxation | Bronchial irritation, cardiac stimulation, CNS stimulation |
| Xanthine Derivatives | Bronchodilation (Asthma) | mechanism unclear | toxicity |
| Anti-cholinergic agents | Asthma and Parkinson disease | block acetylcholine to cause bronchodilation and reduce rigidity | Dry mouth, tachycardia, constipation, confusion |
| Cromones | Asthma and airway inflammation | block histamine | Unknown |
| Leukotriene modifiers | Asthma and airway inflammation | Leukotriene's are the prostaglandins of the airways | Unknown |
| Polysynaptic inhibitors | Muscle spasm | decrease excitation of polysynaptic neurons...decrease alpha motor neuron activity in spinal cord | Sedation |
| Diazepam (Valium) | Muscle spasm and spasticity | increase the inhibatory effects of GABA in brain and spinal cord | Sedation, generalized weakness, drastic changes in muscle tone |
| Baclofen | Spacticity | Synthetic GABA | Sedation, generalized weakness, drastic changes in muscle tone |
| Alpha-2 agonists | Spacticity | decrease excitation of alpha motor neuron | Sedation, generalized weakness, drastic changes in muscle tone |
| Gabapentin | Spacticity | Synthetic GABA | Sedation, generalized weakness, drastic changes in muscle tone |
| Botulinum toxin | Spacticity | muscle paralytic | Sedation, generalized weakness, drastic changes in muscle tone |
| Levodopa (L-dopa) | Parkinson disease | crosses blood brain barrier to replce dopamine | GI distress, orthostatic hypotension, dyskinesias, psychotropic effects, chorea-like symptoms (increased dopamine) |
| Carbidopa | Parkinson disease; with L-dopa | inhibits L-dopa conversion into dopamine before crossing the blood brain barrier | GI distress, orthostatic hypotension, dyskinesias, psychotropic effects, chorea-like symptoms (increased dopamine) |
| COMT inhibitors | Parikinson disease; with L-dopa | inhibits breakdown of L-dopa before crossing the blood brain barrier | GI distress, orthostatic hypotension, dyskinesias, psychotropic effects, chorea-like symptoms (increased dopamine) |
| Dopamine agonists | Parkinson disease | synthetic dopamine | GI distress, orthostatic hypotension, dyskinesias, psychotropic effects, chorea-like symptoms (increased dopamine) |
| Amantadine | Parkinson disease | decrease influence of Aceytlcholine | GI distress, orthostatic hypotension, dyskinesias, psychotropic effects, chorea-like symptoms (increased dopamine) |
| Selegiline | Parkinson disease | inhibits MAO which breaks down dopine; therefore proloings the effect of dopamine | GI distress, orthostatic hypotension, dyskinesias, psychotropic effects, chorea-like symptoms (increased dopamine) |
| Nitrates | Angina | cause vasodilation to decrease work of heart | dizziness, headache, reflex tachycardia |
| Digoxin (Digitalis) | Heart failure and arrhythmia | slows electrial conduction & increase force of contraction | arrhythmia, nausea, anorexia, mental status change, and hallucinations |
| Opioid (Narcotics) | Analgesic | alter pain perception at CNS (polysynaptic ot presynaptic) | Sedation, tolerance, dependence, confusion, postural hypotension, respiratory depression |
| NSAIDS | Analgesic, anti-inflammatory, antipyretic, anticoagulant | inhibit prostaglandin synthesis | gastric irritation, hepatic and renal toxicity |