Benzhexol Hydrochloride, also known as Trihexyphenidyl HCl, is a valuable medication for managing symptoms of Parkinson's disease and certain drug-induced movement disorders. However, like many potent pharmaceuticals, it can cause a range of side effects. Understanding these potential reactions is crucial for patients to ensure safe and effective treatment, and to know when to seek medical advice.

The most frequently reported side effects of Benzhexol Hydrochloride are generally anticholinergic in nature. These include dry mouth, which can be managed by sipping water, chewing sugar-free gum, or using saliva substitutes. Constipation is another common issue, often alleviated by increasing dietary fiber and fluid intake. Blurred vision, dizziness, and mild nausea may also occur. Patients experiencing these should report them to their doctor, as dosage adjustments or supportive measures might be necessary.

More significant side effects can arise, particularly with higher doses or in susceptible individuals. These may include cognitive disturbances such as confusion, memory impairment, agitation, or even hallucinations and delusions. In rare cases, more severe cardiac effects like tachycardia or palpitations can occur. Patients with pre-existing conditions such as glaucoma, enlarged prostate, or bowel/bladder obstructions need to be particularly vigilant, as Benzhexol Hydrochloride can exacerbate these issues.

It is imperative for patients to communicate openly with their healthcare providers about any new or worsening symptoms experienced while taking Benzhexol Hydrochloride. Regular medical check-ups and eye examinations are recommended to monitor for adverse effects. While the drug offers significant benefits for many, a proactive approach to managing its side effects, guided by professional medical advice, is key to optimizing its therapeutic value and ensuring patient well-being.