Phentermine Interactions
Showing entire list of all interactions, including brand names and combination drugs.
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Medications known to interact with phentermine
F
- Farbital (aspirin / butalbital / caffeine)
- Farxiga (dapagliflozin)
- Fastlene (caffeine)
- Father John's Medicine Plus (chlorpheniramine / dextromethorphan / phenylephrine)
- Fedahist (chlorpheniramine / pseudoephedrine)
- Fedahist Gyrocaps (chlorpheniramine / pseudoephedrine)
- Fedahist Timecaps (chlorpheniramine / pseudoephedrine)
- Femcet (acetaminophen / butalbital / caffeine)
- Fendique ER (phendimetrazine)
- Fenesin DM (dextromethorphan / guaifenesin)
- Fenesin DM IR (dextromethorphan / guaifenesin)
- Fenesin PE IR (guaifenesin / phenylephrine)
- Fenex-DM (dextromethorphan / guaifenesin)
- Fenex-PSE (guaifenesin / pseudoephedrine)
- fenfluramine
- fentanyl
- Fentanyl Transdermal System (fentanyl)
- fentanyl / ropivacaine
- Fentex (guaifenesin / phenylephrine / phenylpropanolamine)
- Fentora (fentanyl)
- Fetzima (levomilnacipran)
- fexofenadine / pseudoephedrine
- Fiasp (insulin aspart)
- Fintepla (fenfluramine)
- Fioricet (acetaminophen / butalbital / caffeine)
- Fioricet with Codeine (acetaminophen / butalbital / caffeine / codeine)
- Fiorinal (aspirin / butalbital / caffeine)
- Fiorinal with Codeine (aspirin / butalbital / caffeine / codeine)
- Fiorinal with Codeine III (aspirin / butalbital / caffeine / codeine)
- Fiormor (aspirin / butalbital / caffeine)
- Fiorpap (acetaminophen / butalbital / caffeine)
- Fiortal (aspirin / butalbital / caffeine)
- Fiortal with Codeine (aspirin / butalbital / caffeine / codeine)
- Firdapse (amifampridine)
- Fleet Enema (sodium biphosphate / sodium phosphate)
- Fleet Enema EXTRA (sodium biphosphate / sodium phosphate)
- Fleet EZ-Prep (sodium biphosphate / sodium phosphate)
- Fleet Phospho Soda (sodium biphosphate / sodium phosphate)
- Fleet Prep Kit 1 (bisacodyl / sodium biphosphate / sodium phosphate)
- Fleet Prep Kit 2 (bisacodyl / sodium biphosphate / sodium phosphate)
- Fleet Prep Kit 3 (bisacodyl / sodium biphosphate / sodium phosphate)
- Flextra (acetaminophen / caffeine / phenyltoloxamine)
- Flextra Plus (acetaminophen / caffeine / phenyltoloxamine)
- Flu & Severe Cold & Cough Daytime Powder (acetaminophen / dextromethorphan / phenylephrine)
- Flu HBP Maximum Strength (acetaminophen / chlorpheniramine / dextromethorphan)
- Flu Relief BP (acetaminophen / chlorpheniramine / dextromethorphan)
- Flumezide (bendroflumethiazide / rauwolfia serpentina)
- fluoxetine
- fluoxetine / olanzapine
- fluphenazine
- Flutabs (acetaminophen / dextromethorphan / guaifenesin / pseudoephedrine)
- fluticasone / salmeterol
- fluticasone / umeclidinium / vilanterol
- fluticasone / vilanterol
- FluTuss HC (brompheniramine / hydrocodone / phenylephrine)
- fluvoxamine
- Focalin (dexmethylphenidate)
- Focalin XR (dexmethylphenidate)
- Foradil Aerolizer (formoterol)
- Forfivo XL (bupropion)
- formoterol
- formoterol / glycopyrrolate
- formoterol / mometasone
- Fortabs (aspirin / butalbital / caffeine)
- Fortamet (metformin)
- Frova (frovatriptan)
- frovatriptan
- furazolidone
- Furoxone (furazolidone)
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Drug Interaction Classification
| Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
| Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
| Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. | |
| No interaction information available. |
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.