involves the tendons.
Possible problems include:
* Tendon inflammation
* Pain
* Swelling
* Weakness
* Tendon rupture
The Achilles tendon at the back of the ankle is particularly well known, although other tendons can also be affected. The source article cites medical literature and FDA warnings concerning this complication. ([Santé Nutrition][1])
Risk may be greater in:
* Older adults
* People taking corticosteroids
* People with kidney disease
* Organ-transplant recipients
* People with previous tendon problems
New tendon pain or swelling while taking one of these antibiotics deserves prompt medical attention.
## 2. Peripheral Nerve Problems
Fluoroquinolones can sometimes affect peripheral nerves.
Symptoms may include:
* Burning
* Tingling
* Numbness
* Pins and needles
* Weakness
* Unusual nerve pain
In some reported cases, symptoms have persisted after the medication was discontinued.
That is why new neurological symptoms should not simply be ignored.
## 3. Muscle and Joint Symptoms
Some patients experience musculoskeletal symptoms such as:
* Muscle aching
* Joint pain
* Weakness
* Stiffness
* Reduced mobility
However, the original article claims that damage occurs in **100% of users**, which is not supported by good evidence. ([Santé Nutrition][1])
Most people who receive these antibiotics do **not** develop catastrophic permanent damage.
The risk is real, but it should not be exaggerated.
## 4. Brain and Mental-Health Effects
Fluoroquinolones
