Iobenguane I-123 and Poly-Vent DM (Guaifenesin, Pseudoephedrine, and Dextromethorphan Liquid)

In the database of official manuals used in the service creation an interaction registered by statistical results of studies was found, which can either lead to negative consequences for the patient health or strengthen a mutual positive effect. A doctor should be consulted to address the issue of joint drug administration.

Pseudoephedrine may interfere with imaging studies done with iobenguane I-123. Let your doctor know you are receiving or have recently received pseudoephedrine if you are scheduled for an imaging procedure to detect pheochromocytoma or neuroblastoma (tumors in the nervous system). You may need to stop using pseudoephedrine for a certain amount of time before having the procedure. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

GENERALLY AVOID: Coadministration with drugs that block norepinephrine uptake or deplete norepinephrine stores may decrease iobenguane I-123 uptake in neuroendocrine tumors and lead to false-negative imaging results. Since iobenguane I-123 is subject to the same uptake and accumulation pathways as norepinephrine, drugs that alter norepinephrine disposition in adrenergic nerve terminals and presynaptic storage vesicles will likewise affect iobenguane. These drugs include antihypertensive agents that deplete norepinephrine stores or inhibit reuptake (e.g., guanethidine, reserpine, labetalol); antidepressants that inhibit norepinephrine transporter function (e.g., tricyclic antidepressants, selective serotonin reuptake inhibitors); sympathomimetic amines (e.g., phenylephrine, phenylpropanolamine, pseudoephedrine, ephedrine); central nervous stimulants (e.g., amphetamines); phenothiazines; and cocaine. Clinical studies have not determined which specific drugs may cause false-negative imaging results and whether all drugs in a specific pharmacologic class have the same potential to produce negative imaging results. Increasing the dose of iobenguane I-123 will not overcome any potential effect of these drugs.

MANAGEMENT: When medically feasible, any drug that blocks norepinephrine uptake or deplete norepinephrine stores should be discontinued for at least five biological half-lives before iobenguane I-123 administration. Patients should be monitored for the occurrence of clinically significant withdrawal symptoms, especially patients with elevated levels of circulating catecholamines and their metabolites.

Iobenguane I-123

Generic Name: iobenguane I 123

Brand name: AdreView

Synonyms: I-123 MIBG

What is Iobenguane I-123?

Poly-Vent DM (Guaifenesin, Pseudoephedrine, and Dextromethorphan Liquid)

Generic Name: dextromethorphan / guaifenesin / pseudoephedrine

Brand name: Poly-Vent DM, Tusnel-DM Pediatric Drops, Aldex GS DM, Capmist DM, Desgen, Despec-DM, Maxifed DM, Anatuss DM, Ambenyl-D, Dimacol, Novahistine DMX, Ru-Tuss Expectorant, Rhinosyn-X, Sudafed Cough, Dorcol Childrens Cough, Syn-Rx DM, Guaifenex DM RX, Suda-Tussin DM, Pseudogest-DM, Robitussin Pediatric Cough and Decongestant, Benylin Multi-Symptom Cough, Sudafed Cough Syrup, Daytime Liquicap, Multi Symptom Cough and Cold, Tussin Cough and Cold, Protuss DM, Med-RX DM, Tussafed-LA, Touro CC, Balminil DM-D-E Extra Strength, Benylin DM-D-E, Benylin DM-D-E Extra Strength, Calmylin #4, Novahistine DM Expectorant with Decongestant, Medent DM, Robitussin CF, Profen Forte DM, Profen II DM, Profen II DM Liquid, S-Pak DM, Ru-Tuss DM, Dimetapp Cold and Congestion, PanMist-DM, Relacon-DM, Coldmist DM, Z-COF DM, Ambifed-G DM, Tusnel Pediatric, Touro CC-LD, Relacon-DM NR, Despec Drops, Liquicough DM, Pseudo Cough, Relasin DM, Z-Cof 12DM, Q-Tussin CF, Ambi 60/580/30, Ambi 80/780/40, Ambi 600/1000/30, Trikof-D, Pseudo DM GG, Pseudo Max DMX, SudaTex-DM, ExeFen-DMX, Medent-DMI, Donatussin DM Syrup, Ambifed DM, Tenar DM, Robitussin D, ExeClear-DM, Z-Cof 8DM, Robitussin D Cough & Cold, TL-Dex DM, Tusnel DM Pediatric Drops, Trispec PSE

Synonyms: Poly-Vent DM (Liquid)

What is Poly-Vent DM (Guaifenesin, Pseudoephedrine, and Dextromethorphan Liquid)?