CALAN SR vs VERAPAMIL HYDROCHLORIDE

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 16, 2026·How we rate

Attribute	CALAN SR	VERAPAMIL HYDROCHLORIDE
Rating	64/100	70/100
Pharmacy pays	~$5.71 /30	~$5.71 /30
Type	RX	RX
Active ingredient	VERAPAMIL HYDROCHLORIDE	VERAPAMIL HYDROCHLORIDE
Manufacturer	Pfizer	Watson Labs
Dosage forms	Tablet, extended release	Injectable, Tablet, Tablet, extended release
Drug class	Calcium Channel Blocker	Calcium Channel Blocker
Boxed warning	None	None
Half-life	about 2.8 to 7.4 hours after a single dose, rising to about 4.5 to 12 hours with repeated dosing	about 2.8 to 7.4 hours after a single dose, rising to about 4.5 to 12 hours with repeated dosing
Treats	Variant Angina Pectoris, Atrial Fibrillation, Atrial Flutter	Variant Angina Pectoris, Atrial Fibrillation, Atrial Flutter

calan sr verapamil hydrochloride

Rating

64/100

70/100

Pharmacy pays

~$5.71 /30

Type

Active ingredient

VERAPAMIL HYDROCHLORIDE

Manufacturer

Pfizer

Watson Labs

Dosage forms

Tablet, extended release

Injectable, Tablet, Tablet, extended release

Drug class

Calcium Channel Blocker

Boxed warning

None

Half-life

about 2.8 to 7.4 hours after a single dose, rising to about 4.5 to 12 hours with repeated dosing

Treats

Variant Angina Pectoris, Atrial Fibrillation, Atrial Flutter

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Frequently asked questions

Which is better-rated, Calan SR or Verapamil Hydrochloride?

By our independent rating, Verapamil Hydrochloride scores higher — 3.5 vs 3.2 out of 5 for Calan SR. Ratings are based on FDA regulatory (recall-safety) data.

Which is cheaper, Calan SR or Verapamil Hydrochloride?

Pharmacies pay about the same to acquire either one — roughly $5.71 for a 30-count supply, per the CMS NADAC survey. That is not what you will be charged: your price is set by your insurer and the pharmacy, not by what the drug cost them.

What is the difference between Calan SR and Verapamil Hydrochloride?

Both Calan SR and Verapamil Hydrochloride share the active ingredient Verapamil Hydrochloride.

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.