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Generic Name: mecamylamine (mek-ah-MIL-a-meen)
Brand Name: Inversine

Inversine is used for:

Treating severe high blood pressure. It may also be used for other conditions as determined by your doctor.

Inversine is an antihypertensive agent. It works by relaxing and dilating (widening) blood vessels. Blood flows more freely and at a lower pressure through dilated blood vessels, which helps to lower blood pressure.

Do NOT use Inversine if:

  • you are allergic to any ingredient in Inversine
  • you have heart problems or have recently had a heart attack
  • you are taking an antibiotic or sulfonamide (eg, sulfamethoxazole)
  • you have glaucoma, certain complications from kidney disease (eg, increased levels of waste products in the blood), or narrowing of the passage from the stomach into the intestine (pyloric stenosis)

Contact your doctor or health care provider right away if any of these apply to you.

Before using Inversine:

Some medical conditions may interact with Inversine. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

  • if you are pregnant, planning to become pregnant, or are breast-feeding
  • if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
  • if you have allergies to medicines, foods, or other substances
  • if you have recently suffered a stroke or you have hardening of the arteries or difficulty urinating due to an enlarged prostate ornarrow bladder neck

Some MEDICINES MAY INTERACT with Inversine. Tell your health care provider if you are taking any other medicines, especially any of the following:

  • Urinary alkalinizers because the blood-pressure lowering effects of this drug may be increased

This may not be a complete list of all interactions that may occur. Ask your health care provider if Inversine may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

How to use Inversine:

Use Inversine as directed by your doctor. Check the label on the medicine for exact dosing instructions.

  • Take Inversine with food.
  • Inversine comes with an additional patient leaflet. Read it carefully and reread it each time you get Inversine refilled.
  • Take Inversine on a regular schedule around the clock, unless otherwise directed by your doctor.
  • If you miss a dose of Inversine, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

Ask your health care provider any questions you may have about how to use Inversine.

Important safety information:

  • Inversine may cause dizziness. Do not drive, operate machinery, or do anything else that could be dangerous until you know how you react to Inversine. Using Inversine alone, with certain other medicines, or with alcohol may lessen your ability to drive or perform other potentially dangerous tasks.
  • Inversine may cause dizziness, lightheadedness, or fainting. Alcohol, hot weather, exercise, and fever can increase these effects. To prevent them, sit up or stand slowly, especially in the morning. Also, sit or lie down at the first sign of dizziness, lightheadedness, or weakness.
  • Patients being treated for high blood pressure often feel tired or run down for a few weeks after beginning therapy. Continue taking your medication even though you may not feel "normal." Contact your doctor or pharmacist about any new symptoms.
  • Before you have any medical or dental treatments, emergency care, or surgery, tell the doctor or dentist that you are using Inversine.
  • Stop taking Inversine and contact your health care provider at once if frequent loose bowel movements with stomach bloating and decreased gas occur.
  • Inversine is not recommended for use in CHILDREN. Safety and effectiveness have not been confirmed.
  • PREGNANCY and BREAST-FEEDING: If you become pregnant, discuss with your doctor the benefits and risks of using Inversine during pregnancy. It is unknown if Inversine is excreted in breast milk. Do not breast-feed while you are taking Inversine.

Possible side effects of Inversine:

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Blurred vision; constipation (sometimes preceded by small, frequent liquid stools); decreased sex drive; dizziness; dry mouth; enlarged pupils; impotence;inflammation of the tongue; lightheadedness; loss of appetite; nausea; urinary retention; vomiting.

Seek medical attention right away if any of these SEVERE side effects occur:

Severe allergic reactions (rash; hives; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); abnormal movements; abnormal thinking; difficulty urinating; fainting; frequent loose bowel movements with stomach bloating and decreased gas; seizure; tremors.

This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.

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 anxiety; fainting; irregular heartbeat.

Proper storage of Inversine:

Store Inversine at 77 degrees F (25 degrees C). Store away from heat, moisture, and light. Do not store in the bathroom. Keep Inversine out of the reach of children and away from pets.

General information:

  • If you have any questions about Inversine, please talk with your doctor, pharmacist, or other health care provider.
  • Inversine is to be used only by the patient for whom it is prescribed. Do not share it with other people.
  • If your symptoms do not improve or if they become worse, check with your doctor.

This information is a summary only. It does not contain all information about Inversine. 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.

Issue Date: June 3, 2015

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.