Is someone on biphentin, can he take cold medication?

Please use caution. Biphentin is a stimulant and thus caution is advised when using cold medicines containing decongestants (phenylephrine/pseudoepherine etc..). Medications such as plain mucinex, (guaifenesin) mucinex-dm, coricidin, Robitussin etc.. Are relatively safe when taken appropriately as instructed. So, i would avoid/minimize use cold meds containing decongestant. Consult doc. Good luck.
Be careful. Since it is a strong stimulant and could have compounded reactions with elements contained in certain cold remedies, before you take both, ask you doctor first! good luck!