ISOCLOR vs MYSOLINE

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated October 7, 2026·How we rate

Possible drug interaction. ISOCLOR and MYSOLINE are different prescription medicines. Combining or switching between them can cause interactions — talk to a pharmacist or prescriber before making changes. This page is not medical advice.

Attribute	ISOCLOR	MYSOLINE
Rating	New	74/100
Pharmacy pays	—	~$2.89 /30
Type	RX	RX
Active ingredient	CHLORPHENIRAMINE MALEATE AND PSEUDOEPHEDRINE HYDROCHLORIDE	PRIMIDONE
Manufacturer	Fisons	Valeant Pharm Intl
Dosage forms	Capsule, extended release	Tablet
Drug class	—	Anti-Epileptic Agent
Boxed warning	None	None
Half-life	roughly 3 to 16 hours — the label does not give one number, because the elimination half-life depends on urine pH: about 3 to 6 hours when urine pH is 5 (acidic), and about 9 to 16 hours when urine pH is 8 (alkaline)	—
Treats	—	Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor

isoclor mysoline

Rating

New

74/100

Pharmacy pays

—

~$2.89 /30

Type

Active ingredient

CHLORPHENIRAMINE MALEATE AND PSEUDOEPHEDRINE HYDROCHLORIDE

PRIMIDONE

Manufacturer

Fisons

Valeant Pharm Intl

Dosage forms

Capsule, extended release

Tablet

Drug class

—

Anti-Epileptic Agent

Boxed warning

None

Half-life

roughly 3 to 16 hours — the label does not give one number, because the elimination half-life depends on urine pH: about 3 to 6 hours when urine pH is 5 (acidic), and about 9 to 16 hours when urine pH is 8 (alkaline)

—

Treats

—

Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor

Frequently asked questions

What is the difference between Isoclor and Mysoline?

Isoclor contains Chlorpheniramine Maleate and Pseudoephedrine Hydrochloride, while Mysoline contains Primidone — they have different active ingredients.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.