3-Iodobenzylguanidine
The therapeutic efficacy of Iobenguane can be decreased when used in combination with Phentermine.
Acebutolol
The risk or severity of adverse effects can be increased when Phentermine is combined with Acebutolol.
Acepromazine
Acepromazine may decrease the stimulatory activities of Phentermine.
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Aceprometazine
Aceprometazine may decrease the stimulatory activities of Phentermine.
Acetazolamide
Acetazolamide may decrease the excretion rate of Phentermine which could result in a higher serum level.
Acetophenazine
Acetophenazine may decrease the stimulatory activities of Phentermine.
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Acrivastine
Phentermine may decrease the sedative activities of Acrivastine.
Alcaftadine
Phentermine may decrease the sedative activities of Alcaftadine.
Alfentanil
Phentermine may increase the analgesic activities of Alfentanil.
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Alphaprodine
Phentermine may increase the analgesic activities of Alphaprodine.
Aluminum
Aluminium may decrease the excretion rate of Phentermine which could result in a higher serum level.
Aluminum Hydroxide
Aluminum hydroxide may decrease the excretion rate of Phentermine which could result in a higher serum level.
aluminum hydroxide, dried (USP)
Aluminum hydroxide may decrease the excretion rate of Phentermine which could result in a higher serum level.
Aluminum Magnesium Silicate
Almasilate may decrease the excretion rate of Phentermine which could result in a higher serum level.
Amineptin
Amineptine may increase the stimulatory activities of Phentermine.
Amisulpride
Amisulpride may decrease the stimulatory activities of Phentermine.
Amitriptyline
Amitriptyline may increase the stimulatory activities of Phentermine.
Ammonium Chloride
The serum concentration of Phentermine can be decreased when it is combined with Ammonium chloride.
Amoxapine
Amoxapine may increase the stimulatory activities of Phentermine.
Amphetamine
The risk or severity of adverse effects can be increased when Phentermine is combined with Amphetamine.
Antazoline
Phentermine may decrease the sedative activities of Antazoline.
Aripiprazole
Aripiprazole may decrease the stimulatory activities of Phentermine.
Ascorbate
The serum concentration of Phentermine can be decreased when it is combined with Vitamin C.
Ascorbic Acid
The serum concentration of Phentermine can be decreased when it is combined with Vitamin C.
Asenapine
Asenapine may decrease the stimulatory activities of Phentermine.
Astemizole
Phentermine may decrease the sedative activities of Astemizole.
Atomoxetine
Atomoxetine may increase the hypertensive activities of Phentermine.
Azatadine
Phentermine may decrease the sedative activities of Azatadine.
Azelastine
Phentermine may decrease the sedative activities of Azelastine.
Benperidol
Benperidol may decrease the stimulatory activities of Phentermine.
Benzphetamine
The risk or severity of adverse effects can be increased when Phentermine is combined with Benzphetamine.
Benztropine
Phentermine may decrease the sedative activities of Benzatropine.
Bismuth Subcitrate
Bismuth Subcitrate may decrease the excretion rate of Phentermine which could result in a higher serum level.
Brexpiprazole
Brexpiprazole may decrease the stimulatory activities of Phentermine.
Bromperidol
Bromperidol may decrease the stimulatory activities of Phentermine.
Brompheniramine
Phentermine may decrease the sedative activities of Brompheniramine.
Buclizine
Phentermine may decrease the sedative activities of Buclizine.
Buprenorphine
Phentermine may increase the analgesic activities of Buprenorphine.
Butorphanol
Phentermine may increase the analgesic activities of Butorphanol.
Butyrate
Phentermine may decrease the sedative activities of Butyric Acid.
Butyric Acid
Phentermine may decrease the sedative activities of Butyric Acid.
Calcium Carbonate
Calcium Carbonate may decrease the excretion rate of Phentermine which could result in a higher serum level.
CALCIUM CARBONATE, PRECIPITATED
Calcium Carbonate may decrease the excretion rate of Phentermine which could result in a higher serum level.
Carbinoxamine
Phentermine may decrease the sedative activities of Carbinoxamine.
Cariprazine
Cariprazine may decrease the stimulatory activities of Phentermine.
Celiprolol
The risk or severity of adverse effects can be increased when Phentermine is combined with Celiprolol.
Cetirizine
Phentermine may decrease the sedative activities of Cetirizine.
Chloropyramine
Phentermine may decrease the sedative activities of Chloropyramine.
Chlorpheniramine
Phentermine may decrease the sedative activities of Chlorphenamine.
CHLORPHENIRAMINE POLISTIREX
Phentermine may decrease the sedative activities of Chlorphenamine.
Chlorphenoxamine
Phentermine may decrease the sedative activities of Chlorphenoxamine.
Chlorpromazine
Chlorpromazine may decrease the stimulatory activities of Phentermine.
Chlorprothixene
Chlorprothixene may decrease the stimulatory activities of Phentermine.
Cimetidine
Phentermine may decrease the sedative activities of Cimetidine.
Cinnarizine
Phentermine may decrease the sedative activities of Cinnarizine.
Clemastine
Phentermine may decrease the sedative activities of Clemastine.
Clenbuterol
The risk or severity of adverse effects can be increased when Phentermine is combined with Clenbuterol.
Clomipramine
Clomipramine may increase the stimulatory activities of Phentermine.
Clozapine
Clozapine may decrease the stimulatory activities of Phentermine.
Codeine
Phentermine may increase the analgesic activities of Codeine.
Codeine Anhydrous
Phentermine may increase the analgesic activities of Codeine.
CODEINE POLISTIREX
Phentermine may increase the analgesic activities of Codeine.
Cyamemazine
Cyamemazine may decrease the stimulatory activities of Phentermine.
Cyclizine
Phentermine may decrease the sedative activities of Cyclizine.
Cyclobenzaprine
Cyclobenzaprine may increase the stimulatory activities of Phentermine.
Cyproheptadine
Phentermine may decrease the sedative activities of Cyproheptadine.
Dapiprazole
Dapiprazole may decrease the stimulatory activities of Phentermine.
Desipramine
Desipramine may increase the stimulatory activities of Phentermine.
Desloratadine
Phentermine may decrease the sedative activities of Desloratadine.
Dexbrompheniramine
Phentermine may decrease the sedative activities of Dexbrompheniramine.
Dexchlorpheniramine
Phentermine may decrease the sedative activities of Dexchlorpheniramine.
Dexchlorpheniramine maleate
Phentermine may decrease the sedative activities of Dexchlorpheniramine maleate.
Dextromoramide
Phentermine may increase the analgesic activities of Dextromoramide.
Dezocine
Phentermine may increase the analgesic activities of Dezocine.
Dichlorphenamide
Diclofenamide may decrease the excretion rate of Phentermine which could result in a higher serum level.
Dihydrocodeine
Phentermine may increase the analgesic activities of Dihydrocodeine.
Dimenhydrinate
Phentermine may decrease the sedative activities of Dimenhydrinate.
Dimethindene
Phentermine may decrease the sedative activities of Dimetindene.
Diphenhydramine
Phentermine may decrease the sedative activities of Diphenhydramine.
Diphenoxylate
Phentermine may increase the analgesic activities of Diphenoxylate.
Dobutamine
The risk or severity of adverse effects can be increased when Phentermine is combined with Dobutamine.
Dopamine
The risk or severity of adverse effects can be increased when Phentermine is combined with Dopamine.
Dothiepin
Dosulepin may increase the stimulatory activities of Phentermine.
Doxepin
Phentermine may decrease the sedative activities of Doxepin.
Doxylamine
Phentermine may decrease the sedative activities of Doxylamine.
Droperidol
Droperidol may decrease the stimulatory activities of Phentermine.
Ebastine
Phentermine may decrease the sedative activities of Ebastine.
Emedastine
Phentermine may decrease the sedative activities of Emedastine.
Ephedrine
The risk or severity of adverse effects can be increased when Phentermine is combined with Ephedrine.
Epinastine
Phentermine may decrease the sedative activities of Epinastine.
Epinephrine
The risk or severity of adverse effects can be increased when Phentermine is combined with Epinephrine.
Ethanol
The risk or severity of adverse effects can be increased when Ethanol is combined with Phentermine.
Ethosuximide
Phentermine can cause a decrease in the absorption of Ethosuximide resulting in a reduced serum concentration and potentially a decrease in efficacy.
Ethylmorphine
Phentermine may increase the analgesic activities of Ethylmorphine.
Etilefrine
The risk or severity of adverse effects can be increased when Phentermine is combined with Etilefrine.
Famotidine
Phentermine may decrease the sedative activities of Famotidine.
Fenoterol
The risk or severity of adverse effects can be increased when Phentermine is combined with Fenoterol.
Fentanyl
Phentermine may increase the analgesic activities of Fentanyl.
Fesoterodine
The serum concentration of the active metabolites of Fesoterodine can be increased when Fesoterodine is used in combination with Phentermine.
Fexofenadine
Phentermine may decrease the sedative activities of Fexofenadine.
Flunarizine
Phentermine may decrease the sedative activities of Flunarizine.
Flupenthixol
Flupentixol may decrease the stimulatory activities of Phentermine.
Fluphenazine
Fluphenazine may decrease the stimulatory activities of Phentermine.
Fluspirilene
Fluspirilene may decrease the stimulatory activities of Phentermine.
Fonazine
Phentermine may decrease the sedative activities of Dimetotiazine.
Furazolidone
Furazolidone may increase the hypertensive activities of Phentermine.
Glutamate
The serum concentration of Phentermine can be decreased when it is combined with Glutamic Acid.
Glutamic Acid
The serum concentration of Phentermine can be decreased when it is combined with Glutamic Acid.
Guanethidine
The serum concentration of Phentermine can be decreased when it is combined with Guanethidine.
Haloperidol
Haloperidol may decrease the stimulatory activities of Phentermine.
Heroin
Phentermine may increase the analgesic activities of Heroin.
Hydrocodone
Phentermine may increase the analgesic activities of Hydrocodone.
HYDROCODONE POLISTIREX
Phentermine may increase the analgesic activities of Hydrocodone.
Hydromorphone
Phentermine may increase the analgesic activities of Hydromorphone.
Hydrotalcite
Hydrotalcite may decrease the excretion rate of Phentermine which could result in a higher serum level.
Hydroxyzine
Phentermine may decrease the sedative activities of Hydroxyzine.
Iloperidone
Iloperidone may decrease the stimulatory activities of Phentermine.
Imipramine
Imipramine may increase the stimulatory activities of Phentermine.
Ioflupane I-123
Phentermine may decrease effectiveness of Ioflupane I-123 as a diagnostic agent.
Iproniazid
Iproniazid may increase the hypertensive activities of Phentermine.
Isocarboxazid
Isocarboxazid may increase the hypertensive activities of Phentermine.
Isoproterenol
The risk or severity of adverse effects can be increased when Phentermine is combined with Isoprenaline.
Isothipendyl
Phentermine may decrease the sedative activities of Isothipendyl.
Isoxsuprine
The risk or severity of adverse effects can be increased when Phentermine is combined with Isoxsuprine.
Ketotifen
Phentermine may decrease the sedative activities of Ketotifen.
Labetalol
The risk or severity of adverse effects can be increased when Phentermine is combined with Labetalol.
Levocabastine
Phentermine may decrease the sedative activities of Levocabastine.
Levocetirizine
Phentermine may decrease the sedative activities of Levocetirizine.
Levomethadyl
Phentermine may increase the analgesic activities of Levomethadyl Acetate.
Levorphanol
Phentermine may increase the analgesic activities of Levorphanol.
Linezolid
Linezolid may increase the hypertensive activities of Phentermine.
Lithium
Lithium may decrease the stimulatory activities of Phentermine.
Lithium Cation
Lithium may decrease the stimulatory activities of Phentermine.
Lodoxamide
Phentermine may decrease the sedative activities of Lodoxamide.
Loratadine
Phentermine may decrease the sedative activities of Loratadine.
Loxapine
Loxapine may decrease the stimulatory activities of Phentermine.
Lurasidone
Lurasidone may decrease the stimulatory activities of Phentermine.
Magaldrate
Magaldrate may decrease the excretion rate of Phentermine which could result in a higher serum level.
Magnesium Hydroxide
Magnesium hydroxide may decrease the excretion rate of Phentermine which could result in a higher serum level.
Magnesium Oxide
Magnesium oxide may decrease the excretion rate of Phentermine which could result in a higher serum level.
Magnesium Trisilicate
Magnesium Trisilicate may decrease the excretion rate of Phentermine which could result in a higher serum level.
Meclizine
Phentermine may decrease the sedative activities of Meclizine.
Meperidine
Phentermine may increase the analgesic activities of Pethidine.
Mephentermine
The risk or severity of adverse effects can be increased when Phentermine is combined with Mephentermine.
Mequitazine
Phentermine may decrease the sedative activities of Mequitazine.
Mesoridazine
Mesoridazine may decrease the stimulatory activities of Phentermine.
Metaproterenol
The risk or severity of adverse effects can be increased when Phentermine is combined with Orciprenaline.
Metaraminol
The risk or severity of adverse effects can be increased when Phentermine is combined with Metaraminol.
Methadone
Phentermine may increase the analgesic activities of Methadone.
Methadyl Acetate
Phentermine may increase the analgesic activities of Methadyl Acetate.
Methamphetamine
The risk or severity of adverse effects can be increased when Phentermine is combined with Methamphetamine.
Methapyrilene
Phentermine may decrease the sedative activities of Methapyrilene.
Methazolamide
Methazolamide may decrease the excretion rate of Phentermine which could result in a higher serum level.
Methenamine
The serum concentration of Phentermine can be decreased when it is combined with Methenamine.
Methotrimeprazine
Methotrimeprazine may decrease the stimulatory activities of Phentermine.
Methoxamine
The risk or severity of adverse effects can be increased when Phentermine is combined with Methoxamine.
Methylene blue
The risk or severity of adverse effects can be increased when Phentermine is combined with Methylene blue.
Metoprolol
The serum concentration of Metoprolol can be increased when it is combined with Phentermine.
Metylperon
Melperone may decrease the stimulatory activities of Phentermine.
Mianserin
Phentermine may decrease the sedative activities of Mianserin.
Midodrine
The risk or severity of adverse effects can be increased when Phentermine is combined with Midodrine.
Minaprine
Minaprine may increase the hypertensive activities of Phentermine.
Mirtazapine
Phentermine may decrease the sedative activities of Mirtazapine.
Mizolastine
Phentermine may decrease the sedative activities of Mizolastine.
Moclobemide
Moclobemide may increase the hypertensive activities of Phentermine.
Molindone
Molindone may decrease the stimulatory activities of Phentermine.
Morphine
Phentermine may increase the analgesic activities of Morphine.
Nabilone
Nabilone may increase the tachycardic activities of Phentermine.
Nalbuphine
Phentermine may increase the analgesic activities of Nalbuphine.
Nialamide
Nialamide may increase the hypertensive activities of Phentermine.
Nizatidine
Phentermine may decrease the sedative activities of Nizatidine.
Norepinephrine
The risk or severity of adverse effects can be increased when Phentermine is combined with Norepinephrine.
Normethadone
Phentermine may increase the analgesic activities of Normethadone.
Nortriptyline
Nortriptyline may increase the stimulatory activities of Phentermine.
Nylidrin
The risk or severity of adverse effects can be increased when Phentermine is combined with Nylidrin.
Olanzapine
Olanzapine may decrease the stimulatory activities of Phentermine.
Olopatadine
Phentermine may decrease the sedative activities of Olopatadine.
Ondansetron
Ondansetron may decrease the stimulatory activities of Phentermine.
Opipramol
Opipramol may increase the stimulatory activities of Phentermine.
Opium
Phentermine may increase the analgesic activities of Opium.
Oxatomide
Phentermine may decrease the sedative activities of Oxatomide.
Oxycodone
Phentermine may increase the analgesic activities of Oxycodone.
Oxymetazoline
The risk or severity of adverse effects can be increased when Phentermine is combined with Oxymetazoline.
Oxymorphone
Phentermine may increase the analgesic activities of Oxymorphone.
p-Hydroxyamphetamine
The risk or severity of adverse effects can be increased when Phentermine is combined with Hydroxyamphetamine.
Paliperidone
Paliperidone may decrease the stimulatory activities of Phentermine.
Paregoric
Phentermine may increase the analgesic activities of Morphine.
Pargyline
Pargyline may increase the hypertensive activities of Phentermine.
Pemirolast
Phentermine may decrease the sedative activities of Pemirolast.
Pentazocine
Phentermine may increase the analgesic activities of Pentazocine.
Perazine
Perazine may decrease the stimulatory activities of Phentermine.
Periciazine
Propericiazine may decrease the stimulatory activities of Phentermine.
Perphenazine
Perphenazine may decrease the stimulatory activities of Phentermine.
Phenelzine
Phenelzine may increase the hypertensive activities of Phentermine.
Phenindamine
Phentermine may decrease the sedative activities of Phenindamine.
Pheniramine
Phentermine may decrease the sedative activities of Pheniramine.
Phenmetrazine
The risk or severity of adverse effects can be increased when Phentermine is combined with Phenmetrazine.
Phenobarbital
The serum concentration of Phenobarbital can be decreased when it is combined with Phentermine.
Phenylephrine
The risk or severity of adverse effects can be increased when Phentermine is combined with Phenylephrine.
Phenylpropanolamine
The risk or severity of adverse effects can be increased when Phenylpropanolamine is combined with Phentermine.
Phenytoin
The serum concentration of Phenytoin can be decreased when it is combined with Phentermine.
Pimozide
Pimozide may decrease the stimulatory activities of Phentermine.
Pipamperone
Pipamperone may decrease the stimulatory activities of Phentermine.
Pipothiazine
Pipotiazine may decrease the stimulatory activities of Phentermine.
Pirinitramide
Phentermine may increase the analgesic activities of Piritramide.
Procarbazine
The risk or severity of adverse effects can be increased when Phentermine is combined with Procarbazine.
Procaterol
The risk or severity of adverse effects can be increased when Phentermine is combined with Procaterol.
Prochlorperazine
Prochlorperazine may decrease the stimulatory activities of Phentermine.
Profenamine
Phentermine may decrease the sedative activities of Ethopropazine.
Promazine
Promazine may decrease the stimulatory activities of Phentermine.
Promethazine
Phentermine may decrease the sedative activities of Promethazine.
Propoxyphene
Phentermine may increase the analgesic activities of Dextropropoxyphene.
Prothipendyl
Prothipendyl may decrease the stimulatory activities of Phentermine.
Protriptyline
Protriptyline may increase the stimulatory activities of Phentermine.
Pseudoephedrine
The risk or severity of adverse effects can be increased when Phentermine is combined with Pseudoephedrine.
Pyrilamine
Phentermine may decrease the sedative activities of Mepyramine.
Quetiapine
Quetiapine may decrease the stimulatory activities of Phentermine.
Quetiapine fumarate
Quetiapine may decrease the stimulatory activities of Phentermine.
Racepinephrine
The risk or severity of adverse effects can be increased when Phentermine is combined with Racepinephrine.
Ranitidine
Phentermine may decrease the sedative activities of Ranitidine.
Rasagiline
Rasagiline may increase the hypertensive activities of Phentermine.
Remifentanil
Phentermine may increase the analgesic activities of Remifentanil.
Remoxipride
Remoxipride may decrease the stimulatory activities of Phentermine.
Reserpine
Reserpine may decrease the stimulatory activities of Phentermine.
Risperidone
Risperidone may decrease the stimulatory activities of Phentermine.
Ritodrine
The risk or severity of adverse effects can be increased when Phentermine is combined with Ritodrine.
Roxatidine Acetate
Phentermine may decrease the sedative activities of Roxatidine acetate.
Selegiline
The risk or severity of adverse effects can be increased when Phentermine is combined with Selegiline.
Sertindole
Sertindole may decrease the stimulatory activities of Phentermine.
Sodium Bicarbonate
Sodium bicarbonate may decrease the excretion rate of Phentermine which could result in a higher serum level.
Sufentanil
Phentermine may increase the analgesic activities of Sufentanil.
Sulpiride
Sulpiride may decrease the stimulatory activities of Phentermine.
Synephrine
The risk or severity of adverse effects can be increased when Phentermine is combined with Synephrine.
Tapentadol
Phentermine may increase the analgesic activities of Tapentadol.
Tedizolid
Tedizolid Phosphate may increase the hypertensive activities of Phentermine.
Tedizolid Phosphate
Tedizolid Phosphate may increase the hypertensive activities of Phentermine.
Terbutaline
The risk or severity of adverse effects can be increased when Phentermine is combined with Terbutaline.
Terbutaline Sulfate
The risk or severity of adverse effects can be increased when Phentermine is combined with Terbutaline.
Terfenadine
Phentermine may decrease the sedative activities of Terfenadine.
Tetrahydrocannabinol
Dronabinol may increase the tachycardic activities of Phentermine.
Tetrahydrozoline
The risk or severity of adverse effects can be increased when Phentermine is combined with Tetryzoline.
Thioproperazine
Thioproperazine may decrease the stimulatory activities of Phentermine.
Thioridazine
The serum concentration of Thioridazine can be increased when it is combined with Phentermine.
Thiothixene
Thiothixene may decrease the stimulatory activities of Phentermine.
Thonzylamine
Phentermine may decrease the sedative activities of Thonzylamine.
Tianeptine
Tianeptine may increase the stimulatory activities of Phentermine.
Tiapride
Tiapride may decrease the stimulatory activities of Phentermine.
Toloxatone
Toloxatone may increase the hypertensive activities of Phentermine.
Tramadol
Phentermine may increase the analgesic activities of Tramadol.
Tramazoline
The risk or severity of adverse effects can be increased when Phentermine is combined with Tramazoline.
Tranilast
Phentermine may decrease the sedative activities of Tranilast.
Tranylcypromine
Tranylcypromine may increase the hypertensive activities of Phentermine.
Trifluoperazine
Trifluoperazine may decrease the stimulatory activities of Phentermine.
Triflupromazine
Triflupromazine may decrease the stimulatory activities of Phentermine.
Trimeprazine
Phentermine may decrease the sedative activities of Alimemazine.
Trimipramine
Trimipramine may increase the stimulatory activities of Phentermine.
Tripelennamine
Phentermine may decrease the sedative activities of Tripelennamine.
Triprolidine
Phentermine may decrease the sedative activities of Triprolidine.
Tromethamine
Tromethamine may decrease the excretion rate of Phentermine which could result in a higher serum level.
Tryptophan
L-Tryptophan may increase the serotonergic activities of Phentermine.
Tyramine
The risk or severity of adverse effects can be increased when Phentermine is combined with Tyramine.
Ziprasidone
Ziprasidone may decrease the stimulatory activities of Phentermine.
Zotepine
Zotepine may decrease the stimulatory activities of Phentermine.
Zuclopenthixol
Zuclopenthixol may decrease the stimulatory activities of Phentermine.
