The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
See "Other Side Effects."
Less Common Side Effects
- Dizziness
- Headache
- Weakness
- Tiredness
- Nausea or vomiting
- Diarrhea
- Dry mouth
- Skin that's sensitive to sunlight (higher risk for sunburn)
- Rash
- Kidney stones
- Higher uric acid levels
Triamterene serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- High potassium levels: nausea, vomiting, muscle weakness, tiredness, tingling or numbness, irregular heartbeat
Source: DailyMed
The following Triamterene side effects have also been reported
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Incidence not known
Abdominal or stomach pain
agitation
black, tarry stools
bleeding gums
blood in the urine or stools
chills
clay-colored stools
cloudy urine
confusion
convulsions
dark urine
decreased urine output
difficulty breathing
difficulty swallowing
dizziness
fainting spells
fast or irregular heartbeats
headache
hostility
increased thirst
irritability
joint pain
lethargy
loss of appetite
loss of consciousness
mood changes
muscle pain or cramps
muscle twitching
nausea or vomiting
nervousness
numbness or tingling in the hands, feet, or lips
pain in the groin or genitals
pain in the lower back or side
pinpoint red spots on the skin
puffiness or swelling of the eyelids or around the eyes, face, lips or tongue
rapid or unusual weight gain
seizures
sharp back pain just below the ribs
shortness of breath
skin rash
stupor
swelling of the face, ankles, feet, or hands
tightness in the chest
unpleasant breath odor
unusual bleeding or bruising
unusual tiredness or weakness
vomiting of blood
weakness or heaviness of the legs
yellow eyes or skin
Get emergency help immediately if any of the following symptoms of overdose occur:
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Incidence not known
Increased sensitivity of skin to sunlight
redness or other discoloration of the skin
severe sunburn
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

