Brand & Generic Names

Mytelase

Basic Information

• Habit forming? No
• Prescription needed? Yes
• Available as generic? No
• Drug class: Cholinergic, antimyasthenic

Uses

• Diagnosis and treatment of myasthenia gravis.
• Treatment of urinary retention and abdominal distention.

Dosage & Usage Information

How to take:
Tablet--Swallow with liquid or food to lessen stomach irritation.
Extended-release capsules and tablets--Swallow each dose whole with liquid; do not crush.

When to take:
As directed, usually 3 or 4 times a day.

If you forget a dose:
Take as soon as you remember up to 2 hours late. If more than 2 hours, wait for next scheduled dose (don't double this dose).

What drug does:
Inhibits the chemical activity of an enzyme (cholinesterase) so nerve impulses can cross the junction of nerves and muscles.

Time lapse before drug works:
3 hours.

Don't take with:
Any other medicine without consulting your doctor or pharmacist.

Overdose

SYMPTOMS:
Muscle weakness or paralysis, cramps, twitching or clumsiness; severe diarrhea, nausea, vomiting, stomach cramps or pain; breathing difficulty; confusion, irritability, nervousness, restlessness, fear; unusually slow heartbeat; seizures, blurred vision, extreme fatigue.

WHAT TO DO:

• Dial 911 (emergency) or O (operator) for an ambulance or medical help. Then give first aid immediately.
• See EMERGENCY Information.

Possible Adverse Reactions or Side Effects

Life-threatening:

In case of overdose, see Overdose section.

Common:

• Mild diarrhea, nausea, vomiting, stomach cramps or pain.
• Excess saliva, unusual sweating.

Infrequent:

• Confusion, irritability.
• Constricted pupils, watery eyes, lung congestion, urgent or frequent urination.

Rare:

None expected.

Warnings & Precautions

Don't take if:

• You are allergic to any cholinergic or bromide.
• You take mecamylamine.

Before you start, consult your doctor:

• If you plan to become pregnant within medication period.
• If you have bronchial asthma.
• If you have heartbeat irregularities.
• If you have urinary obstruction or urinary-tract infection.

Over age 60:
Adverse reactions and side effects may be more frequent and severe than in younger persons.

Pregnancy:
Studies inconclusive on harm to unborn child. Decide with you doctor whether drug benefits justify risk to unborn child. When given intravenously, may increase contractions of the womb close to time of delivery.

Breast-feeding:
No problems expected, but consult doctor.

Infants & children:
Use only under medical supervision.

Prolonged use:
Medication may lose effectiveness. Discontinuing for a few days may restore effect.

Skin & sunlight:
No problems expected.

Driving, piloting or hazardous work:
Don't drive or pilot aircraft until you learn how medicine affects you. Don't work around dangerous machinery. Don't climb ladders or work in high places. Danger increases if you drink alcohol or take medicine affecting alertness and reflexes, such as antihistamines, tranquilizers, sedatives, pain medicine, narcotics and mind-altering drugs.

Discontinuing:
Don't discontinue without doctor's advice until you complete prescribed dose, even though symptoms diminish or disappear.

Others:
No problems expected.

Possible Interaction with Other Drugs

GENERIC NAME	COMBINED EFFECT
------------------------	-----------------------
Anesthetics,	Decreased
local or general*	ambenonium effect.
Antiarrhythmics*	Decreased ambenonium effect.
Antibiotics*	Decreased ambenonium effect.
Anticholinergics*	Decreased ambenonium effect. May
	mask severe side effects.
Cholinergics,	Reduced intestinal-tract
other*	function. Possible brain and
	nervous-system toxicity.
Guanadrel	Decreased ambenonium effect.
Guanethidine	Decreased ambenonium effect.
Mecamylamine	Decreased ambenonium effect.
Nitrates*	Decreased ambenonium effect.
Procainamide	Decreased ambenonium effect.
Quinidine	Decreased ambenonium effect.
Trimethaphan	Decreased ambenonium effect.

Possible Interaction with Other Substances

INTERACTS WITH	COMBINED EFFECT
---------------	---------------
Alcohol:	No proven problems with small
	doses.
Beverages:	None expected.
Cocaine:	Decreased ambenonium effect. Avoid.
Foods:	None expected.
Marijuana:	No proven problems.
Tobacco:	No proven problems.