Fatigue: Why you're tired and what you can do about it

Feeling drained all the time? Fatigue is more than wanting an extra cup of coffee. It can come from sleep problems, medical issues, or the meds you're taking. The good news: a few focused checks and small changes often make a big difference.

Common causes to check

Start with the basics: sleep quality, mood, and blood tests. Poor sleep or sleep apnea leaves you exhausted even after eight hours in bed. Depression and anxiety commonly sap energy. Low iron, low thyroid function, and vitamin D deficiency show up as tiredness on blood work. If you’re on meds, read the side-effect sections—drugs like some antidepressants (see our Effexor guide), certain antivirals (check the Sustiva article), and some seizure medicines (Dilantin) can cause daytime sleepiness.

Chronic conditions such as heart disease, diabetes, and chronic lung problems also cause fatigue. Even dehydration, heavy drinking, or uncontrolled pain can wear you down. Note when the tiredness started and whether it’s constant or comes in waves—those details help your clinician zero in on causes.

Practical steps you can try now

Before chasing exotic fixes, try these simple, concrete moves. Improve sleep hygiene: set a consistent wake-up time, limit screens an hour before bed, and keep your bedroom cool and dark. Boost daytime habits: short walks, a glass of water, and 10 minutes of sunlight can raise alertness. Use caffeine strategically—early and moderate, not late in the afternoon.

Review your medicines. Compare what you take with trusted information on medication pages—articles like “Effexor (Venlafaxine): Uses, Side Effects” or “Sustiva: Side Effects, Usage” explain which drugs often cause fatigue. Don’t stop meds on your own; talk with your prescriber about alternatives, timing changes, or dose adjustments.

Get targeted tests: ask your doctor for a simple panel—CBC for anemia, TSH for thyroid, and basic metabolic tests. If sleep apnea is likely (snoring, morning headaches, daytime nodding off), request a sleep study. If mood looks like a major factor, a quick mental health screen helps direct treatment.

Consider supplements only after testing and talking to a pro. Some people benefit from iron or vitamin D when a deficiency is confirmed. Others try lifestyle-supporting supplements discussed on our site, like glutathione or natural options—but always check interactions with prescription drugs.

If your fatigue is sudden, severe, or tied to chest pain, fainting, or breathing trouble, get urgent care. Otherwise, start with the checks above and read practical guides on medication side effects and safe alternatives available on CanadianPharmacyWorld. Small changes plus the right medical tests usually point the way back to better energy.