WASHINGTON — A list of drugs considered likely candidates for a transition drug class and potential side effects:

NAPROXEN

Brand Name: Naprosyn

Uses: Arthritis, menstrual cramps

Possible Side Effects: Kidney damage, ulcers

TERFENADINE

Brand Name: Seldane

Use: Allergies

Possible Side Effects: Increased heart rate, nightmares

CIMETIDINE

Brand Name: Tagamet

Use: Ulcers

Possible Side Effects: Male breast enlargement, headaches

METAPROTERENOL

Brand Name: Alupent, Metaprel

Use: Asthma

Possible Side Effects: Increased heart rate, vomiting

PHENYLPROPANOLAMINE (PPA)

Use: Ingredient in diet pills

Possible Side Effects: High blood pressure, dizziness

PIROXICAM

Brand Name: Feldene

Use: Arthritis

Possible Side Effects: Skin rash, ulcers

METHOCARBAMOL

Brand Name: Robaxin

Use: Muscle relaxant

Possible Side Effects: Fever, dizziness