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Pharmacy FAQ

What is online pharmacy?

Since about the year 2000, hundreds of pharmacies have begun operating over the internet.
Many such pharmacies are, in some ways, similar to community pharmacies; the primary difference is the method by which the medications are requested and received. Some customers consider... more >>

What does the term "generic" mean? Do generic medications produce the same effect as the brand name medicines do?

The difference between a brand name medicine and a generic one is in the name, shape and in the price. A generic drug is usually called by the name of the active ingredient while a manufactur... more >>

Why are generic medicines so cheap?

Generics are much cheaper than brand-name drugs because generic companies do not have overhead cost such as research and marketing. Most generic drugs are manufactured off-shore and sold online. Since manufacturers do not spend on advertising, research, and creating a ... more >>

Are generic drugs as reliable as brand name pills?

Generic drugs are tested under the same standards as brand-name drugs. Each generic drug is laboratory tested so that the same amount is absorbed into the body as with brand-name drugs.
The FDA (U.S Food and Drug Administration), regulates the market... more >>

Generic pills do not look like the brand name medication. The pills have a different name printed on them. Why?

As we have already mentioned that no manufacturer can take out a patent for a chemical agent. Thus generics can have the exactly same active ingredients as the brand pills. However, names and ... more >>

Are generic drugs patented?

No, but having a patent does not make it any more reliable.

... more >>
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Generic Name: Verapamil Injection (ver-AP-a-mil)
Brand Name: Calan

Verapamil is used for:

Treating supraventricular tachycardia, a rhythm disturbance of the heart. It is also used for controlling heart rate response to other rhythm disturbances, specifically atrial fibrillation and atrial flutter. It may also be used for other conditions as determined by your doctor.

Verapamil is a calcium channel blocker. It works by slowing the electrical conduction in the heart, slowing heart rate, and/or normalizing heart rhythm.

Do NOT use Verapamil if:

  • you are allergic to any of the ingredients contained in Verapamil
  • you have certain heart conditions (eg, sick sinus syndrome or second- or third-degree heart block and do not have a pacemaker) or very low blood pressure
  • you have atrial fibrillation or flutter and a pre-excitation syndrome (extra conduction pathway in the heart) such as Wolff-Parkinson-White syndrome (WPW) or Lown-Ganong-Levine syndrome (LGL)
  • you are taking dofetilide or eletriptan

Contact your health care provider as soon as possible if any of the above applies to you.

Consider before using Verapamil

Medical Conditions

There are medical conditions that can influence usage of Verapamil . Tell your doctor or pharmacist if any of the medical conditions below applies to you:

  • if you are either pregnant or planning to become pregnant
  • if you are breast-feeding
  • if you are taking any medicine (either prescription or nonprescription), herbal preparation, or dietary supplement
  • if you are allergic to medicines, foods, or other substances
  • if you have heart failure or a recent heart attack with lung congestion; low blood pressure; heart problems, including a very slow heart rate, or heart valve disease
  • if you have kidney or liver disease, muscular dystrophy, or neurologic disease

Drugs Interaction

There are medicines that may interact with Verapamil . Inform your health care provider if you are taking any other medicines, in particular any from the list below:

  • Beta-blockers (eg, propranolol), disopyramide, ketolides (eg, telithromycin), or macrolides (eg, erythromycin) because the actions and side effects of Verapamil , some potentially life-threatening, may be increased
  • Rifampin because it may decrease Verapamil 's effectiveness
  • Aldosterone blockers (eg, spironolactone), beta-blockers (eg, propranolol), carbamazepine, digoxin, dofetilide, eletriptan, erythromycin, flecainide, HMG-CoA reductase inhibitors (eg, simvastatin), lithium, nondepolarizing muscle relaxants (eg, atracurium), quinazolines (eg, metolazone), quinidine, or theophyllines (eg, aminophylline) because the actions and side effects, some potentially life-threatening, may be increased by Verapamil

This is not a full list of all interactions that may occur. Clarify with your health care provider whether Verapamil may interact with other medicines you take. Also, consult your health care provider in advance if you are going to start, stop, or change the dose of any medicine.

Verapamil Usage Guidelines

You should use Verapamil as recommended by your doctor. Read the medicine's label for precise dosing instructions.

  • Verapamil is usually given as an injection at your doctor's office, hospital, or clinic. If you will be using Verapamil at home, a health care provider will teach you how to use it. Be sure you understand how to use Verapamil . Follow the procedures you are taught when you use a dose. Contact your health care provider if you have any questions
  • Do not use Verapamil if it contains particles, is cloudy or discolored, or if the vial is cracked or damaged.
  • Keep this product, as well as syringes and needles, out of the reach of children and pets. Do not reuse needles, syringes, or other materials. Ask your health care provider how to dispose of these materials after use. Follow all local rules for disposal.
  • If you miss a dose of Verapamil , take it as soon as you get it remembered. However, if it is almost time for the next dose, ignore the missed one and get back to your normal dosing schedule. Do not take 2 doses at the same time.

Clarify with your health care provider any issues you may have about usage of Verapamil .

Important safety information on verapamil

  • Verapamil may cause dizziness. There effects may be worsened when this medicine is taken with aclohol or other medicines. Use Verapamil with caution. Refrain from driving or performing other possibly dangerous activities until you know how you react to it.
  • Do not drink alcohol or use medicines that may cause drowsiness (eg, sleep aids, muscle relaxers) while you are using Verapamil ; it may add to their effects. Ask your pharmacist if you have questions about which medicines may cause drowsiness.
  • Verapamil may cause dizziness, lightheadedness, or fainting; alcohol, hot weather, exercise, or fever may increase these effects. To prevent them, sit up or stand slowly, especially in the morning. Sit or lie down at the first sign of any of these effects.
  • Lab tests, including liver function, kidney function, complete blood count, ECG, and blood pressure, may be performed while you use Verapamil . These tests can be used to monitor your medical condition or to check for side effects. Be sure to keep all doctor and lab appointments.
  • Use Verapamil with caution in OLDER PATIENTS, because they may be more sensitive to its effects.
  • Verapamil should not be used in CHILDREN; safety and effectiveness in children have not been confirmed.
  • PREGNANCY and BREAST-FEEDING: If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using Verapamil while you are pregnant. Verapamil is found in breast milk. Do not breast-feed while taking Verapamil .

Side effects may be caused by Verapamil

Any medicine may cause side effects, but the majority of people have either slight side effects, or dont have it at all. Consult your doctor if any of the most COMMON side effects from the list below persist or start bothering you:

Dizziness; fatigue; headache; lightheadedness.

Seek medical care immediately if any of the following SEVERE side effects occur:

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); chest pain; lightheadedness, especially upon standing; severe dizziness; shortness of breath; swelling of feet or hands; unusually fast, slow or irregular heartbeat.

It sholud be noted, that this is not a full list of possible side effects. If you have questions or need medical advice about side effects, contact your doctor or health care provider. You may report side effects to the FDA at 1-800-FDA-1088 (1-800-332-1088) or at

If OVERDOSE is suspected:

Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center (, or emergency room immediately. Symptoms may include decreased mental status; dizziness; loss of consciousness; shortness of breath; slow or irregular heartbeat.

Verapamil storage instructions:

Store the undiluted solution of Verapamil at room temperature between 59 and 86 degrees F (15 and 30 degrees C). Since the product does not contain a preservative, any unused portion should be discarded. Verapamil is stable for 24 hours when added to compatible intravenous solutions at 77 degrees F (25 degrees C). Protect from heat, light, and moisture. Keep Verapamil out of the reach of children and away from pets.

General information:

  • If you have any questions on Verapamil , please consult your doctor, pharmacist, or health care provider.
  • Verapamil is supposed to be used only by the patient it is prescribed to. Do not share it with other people.
  • If your symptoms do not improve or even become worse, inform your doctor.

This article is a summary only, and it does not provide all the information about Verapamil . If you have questions about the medicine you are taking or would like more information, check with your doctor, pharmacist, or other health care provider.

Consumer Information (MedFacts)


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