HALFLYTELY vs MYSOLINE

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated October 6, 2026·How we rate

Possible drug interaction. HALFLYTELY 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	HALFLYTELY	MYSOLINE
Rating	70/100	74/100
Pharmacy pays	~$10.09 /30	~$2.89 /30
Type	RX	RX
Active ingredient	BISACODYL AND POLYETHYLENE GLYCOL 3350 AND POTASSIUM CHLORIDE AND SODIUM BICARBONATE AND SODIUM CHLORIDE	PRIMIDONE
Manufacturer	Braintree	Valeant Pharm Intl
Dosage forms	Tablet, delayed release	Tablet
Drug class	—	Anti-Epileptic Agent
Boxed warning	None	None
Treats	—	Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor

halflytely mysoline

Rating

70/100

74/100

Pharmacy pays

~$10.09 /30

~$2.89 /30

Type

Active ingredient

BISACODYL AND POLYETHYLENE GLYCOL 3350 AND POTASSIUM CHLORIDE AND SODIUM BICARBONATE AND SODIUM CHLORIDE

PRIMIDONE

Manufacturer

Braintree

Valeant Pharm Intl

Dosage forms

Tablet, delayed release

Tablet

Drug class

—

Anti-Epileptic Agent

Boxed warning

None

Treats

—

Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor

Frequently asked questions

Which is better-rated, Halflytely or Mysoline?

By our independent rating, Mysoline scores higher — 3.7 vs 3.5 out of 5 for Halflytely. Ratings are based on FDA regulatory (recall-safety) data.

Which is cheaper, Halflytely or Mysoline?

Mysoline costs pharmacies less to acquire — about $2.89 vs $10.09 for a 30-count supply, per the CMS NADAC survey. That gap is in the pharmacy's cost of goods, not necessarily in what you pay: your price is set afterwards by your insurer and the pharmacy.

What is the difference between Halflytely and Mysoline?

Halflytely contains Bisacodyl and Polyethylene Glycol 3350 and Potassium Chloride and Sodium Bicarbonate and Sodium Chloride, 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.