Numbness and Tingling Are Not Listed as Side Effects of Losartan
Numbness and tingling are not documented as side effects of losartan in the FDA drug label or major clinical trials. The FDA-approved prescribing information for losartan does not include paresthesia (numbness/tingling) among its adverse reactions 1.
Documented Side Effects of Losartan
The most common side effects of losartan in hypertensive patients include 1:
- Upper respiratory infection (8%)
- Dizziness (3%)
- Stuffy nose (2%)
- Back pain (2%)
In patients with type 2 diabetes and diabetic kidney disease, the most common side effects are 1:
- Diarrhea
- Tiredness
- Low blood sugar
- Chest pain
- High blood potassium
- Low blood pressure
Important Distinction: Diabetic Neuropathy vs. Drug Side Effect
If you are experiencing numbness and tingling while taking losartan, this is much more likely related to diabetic peripheral neuropathy rather than the medication itself. Diabetic peripheral neuropathy commonly causes burning, tingling, and numbness, particularly in patients with type 2 diabetes 2, 3.
Key Clinical Features of Diabetic Neuropathy:
- Small-fiber involvement causes pain and dysesthesia (burning and tingling sensations) 2, 3
- Large-fiber involvement causes numbness and loss of protective sensation 2, 3
- Up to 50% of diabetic peripheral neuropathy may be asymptomatic initially 2
Clinical Safety Profile
Large-scale clinical trials demonstrate losartan's excellent tolerability 4, 5:
- In approximately 3,800 patients across 16 double-masked trials, only dizziness occurred more frequently (≥1%) with losartan versus placebo 4
- Discontinuation rates due to adverse events were actually lower with losartan (2.3%) compared to placebo (3.7%) 5
- A community-based study found losartan better tolerated than ACE inhibitors and calcium channel blockers 6
Rare Neurological Case Report
There is one isolated case report from 2019 describing tremors and dysarthria (not numbness/tingling) associated with losartan use 7. However, this represents an extremely rare occurrence and involved different neurological symptoms than what you're asking about.
Clinical Recommendation
If you are experiencing numbness and tingling while on losartan, you should be evaluated for diabetic peripheral neuropathy rather than attributing these symptoms to the medication. Annual screening for diabetic peripheral neuropathy is recommended for all patients with type 2 diabetes using pinprick sensation, temperature sensation, vibration perception with a 128-Hz tuning fork, and 10-g monofilament testing 2, 3.
The treatment for diabetic neuropathy focuses on optimizing glucose control and may include medications like pregabalin or duloxetine for neuropathic pain 8, 3, not discontinuation of losartan, which provides important cardiovascular and renal protection in diabetic patients 9, 10.