is not clear, use caution. Use Caution/Monitor.etodolacetodolac increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.fenfluraminemetaproterenol and fenfluramine both decrease sedation. Use Caution/Monitor.metaproterenol and fenfluramine both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.fenoprofenfenoprofen increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.fluphenazinefluphenazine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.flurazepamflurazepam increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.flurbiprofenflurbiprofen increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.formoterolformoterol and metaproterenol both decrease serum potassium. Use Caution/Monitor.formoterol and metaproterenol both decrease sedation. Use Caution/Monitor.formoterol and metaproterenol both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.furosemidemetaproterenol and furosemide both decrease serum potassium. Use Caution/Monitor.gentamicinmetaproterenol and gentamicin both decrease serum potassium. Use Caution/Monitor.green teagreen tea increases effects of metaproterenol by pharmacodynamic synergism. Use Caution/Monitor. Due to caffeine content. Combination may increase CNS stimulatory effects due to caffeine in green tea.haloperidolhaloperidol increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.hydrochlorothiazidemetaproterenol and hydrochlorothiazide both decrease serum potassium. Use Caution/Monitor.hydromorphonehydromorphone increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.hydroxyzinehydroxyzine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.ibuprofenibuprofen increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.ibuprofen IVibuprofen IV increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.iloperidoneiloperidone increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.imipramineimipramine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.indapamidemetaproterenol and indapamide both decrease serum potassium. Use Caution/Monitor.indomethacinindomethacin increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.isoproterenolisoproterenol and metaproterenol both decrease serum potassium. Use Caution/Monitor.isoproterenol and metaproterenol both decrease sedation. Use Caution/Monitor.isoproterenol and metaproterenol both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.ketoprofenketoprofen increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.ketorolacketorolac increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.ketorolac intranasalketorolac intranasal increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor. .ketotifen, ophthalmicketotifen, ophthalmic increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.labetalollabetalol increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.labetalol decreases effects of metaproterenol by pharmacodynamic antagonism. Use Caution/Monitor.levalbuterollevalbuterol and metaproterenol both decrease serum potassium. Use Caution/Monitor.levalbuterol and metaproterenol both decrease sedation. Use Caution/Monitor.levalbuterol and metaproterenol both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.levorphanollevorphanol increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.lisdexamfetaminemetaproterenol and lisdexamfetamine both decrease sedation. Use Caution/Monitor.metaproterenol and lisdexamfetamine both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.lofepraminelofepramine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.lofexidinelofexidine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.loprazolamloprazolam increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.lorazepamlorazepam increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.lormetazepamlormetazepam increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.lornoxicamlornoxicam increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.loxapineloxapine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.loxapine inhaledloxapine inhaled increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.maprotilinemaprotiline increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.marijuanamarijuana increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.meclofenamatemeclofenamate increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.mefenamic acidmefenamic acid increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.melatoninmelatonin increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.meloxicammeloxicam increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.meperidinemeperidine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.meprobamatemeprobamate increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.methadonemethadone increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.methamphetaminemetaproterenol and methamphetamine both decrease sedation. Use Caution/Monitor.metaproterenol and methamphetamine both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.methyclothiazidemetaproterenol and methyclothiazide both decrease serum potassium. Use Caution/Monitor.methylenedioxymethamphetaminemetaproterenol and methylenedioxymethamphetamine both decrease sedation. Use Caution/Monitor.metaproterenol and methylenedioxymethamphetamine both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.methylphenidatemetaproterenol and methylphenidate both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.metolazonemetaproterenol and metolazone both decrease serum potassium. Use Caution/Monitor.metoprololmetoprolol increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.metoprolol decreases effects of metaproterenol by pharmacodynamic antagonism. Use Caution/Monitor.midazolammidazolam increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.midodrinemetaproterenol and midodrine both decrease sedation. Use Caution/Monitor.metaproterenol and midodrine both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.mirtazapinemirtazapine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.modafinilmetaproterenol and modafinil both decrease sedation. Use Caution/Monitor.morphinemorphine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.motherwortmotherwort increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.moxonidinemoxonidine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.nabilonenabilone increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.nabumetonenabumetone increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.nadololnadolol increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.nadolol decreases effects of metaproterenol by pharmacodynamic antagonism. Use Caution/Monitor.nalbuphinenalbuphine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.naproxennaproxen increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.nebivololnebivolol increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.nebivolol decreases effects of metaproterenol by pharmacodynamic antagonism. Use Caution/Monitor.norepinephrinemetaproterenol and norepinephrine both decrease serum potassium. Use Caution/Monitor.metaproterenol and norepinephrine both decrease sedation. Use Caution/Monitor.metaproterenol and norepinephrine both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.nortriptylinenortriptyline increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.olanzapineolanzapine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.olodaterol inhaledmetaproterenol and olodaterol inhaled both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor. Caution with coadministration of adrenergic drugs by any route because of additive sympathetic effectsopium tinctureopium tincture increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.oxaprozinoxaprozin increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.oxazepamoxazepam increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.oxycodoneoxycodone increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.oxymorphoneoxymorphone increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.paliperidonepaliperidone increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.papaveretumpapaveretum increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.parecoxibparecoxib increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.penbutololpenbutolol increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.penbutolol decreases effects of metaproterenol by pharmacodynamic antagonism. Use Caution/Monitor.pentazocinepentazocine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.pentobarbitalpentobarbital increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.perphenazineperphenazine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.phendimetrazinemetaproterenol and phendimetrazine both decrease sedation. Use Caution/Monitor.metaproterenol and phendimetrazine both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.phenobarbitalphenobarbital increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.phenoxybenzaminephenoxybenzamine, metaproterenol. Mechanism: pharmacodynamic synergism. Use Caution/Monitor. Hypotension, tachycardia.phenterminemetaproterenol and phentermine both decrease sedation. Use Caution/Monitor.metaproterenol and phentermine both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.phenylephrinemetaproterenol and phenylephrine both decrease sedation. Use Caution/Monitor.metaproterenol and phenylephrine both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.phenylephrine POmetaproterenol and phenylephrine PO both decrease sedation. Use Caution/Monitor.metaproterenol and phenylephrine PO both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.pholcodinepholcodine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.pimozidepimozide increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.pindololpindolol increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.pindolol decreases effects of metaproterenol by pharmacodynamic antagonism. Use Caution/Monitor.pirbuterolmetaproterenol and pirbuterol both decrease serum potassium. Use Caution/Monitor.metaproterenol and pirbuterol both decrease sedation. Use Caution/Monitor.metaproterenol and pirbuterol both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.piroxicampiroxicam increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.potassium acid phosphatepotassium acid phosphate increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Modify Therapy/Monitor Closely.potassium chloridepotassium chloride increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Modify Therapy/Monitor Closely.potassium citratepotassium citrate increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Modify Therapy/Monitor Closely.primidoneprimidone increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.procarbazineprocarbazine increases effects of metaproterenol by pharmacodynamic synergism. Use Caution/Monitor.prochlorperazineprochlorperazine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.promethazinepromethazine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.propranololpropranolol increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.propranolol decreases effects of metaproterenol by pharmacodynamic antagonism. Use Caution/Monitor.propylhexedrinemetaproterenol and propylhexedrine both decrease sedation. Use Caution/Monitor.metaproterenol and propylhexedrine both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.protriptylineprotriptyline increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.pseudoephedrinemetaproterenol and pseudoephedrine both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.quazepamquazepam increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.quetiapinequetiapine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.risperidonerisperidone increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.sacubitril/valsartansacubitril/valsartan increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.salicylates (non-asa)salicylates (non-asa) increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.salmeterolmetaproterenol and salmeterol both decrease serum potassium. Use Caution/Monitor.metaproterenol and salmeterol both decrease sedation. Use Caution/Monitor.metaproterenol and salmeterol both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.salsalatesalsalate increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.scullcapscullcap increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.secobarbitalsecobarbital increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.serdexmethylphenidate/dexmethylphenidatemetaproterenol and serdexmethylphenidate/dexmethylphenidate both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.shepherd's purseshepherd's purse increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.sodium sulfate/potassium chloride/magnesium sulfate/polyethylene glycolmetaproterenol and sodium sulfate/potassium chloride/magnesium sulfate/polyethylene glycol both decrease serum potassium. Modify Therapy/Monitor Closely.solriamfetolmetaproterenol and solriamfetol both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.sotalolsotalol increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.sotalol decreases effects of metaproterenol by pharmacodynamic antagonism. Use Caution/Monitor.spironolactonespironolactone increases and metaproterenol