... as nausea and diarrhea, sweating, blurred vision, fasciculations and dizziness. Possible adverse effects include vomiting, cramping, bronchospasm, bradycardia, arrhythmias, seizures, urinary incontinence ... anticholinesterase activity, huperzine a could cause a cholinergic reaction. Huperzine side effects could include sweating, nausea, vomiting, dizziness, and cramps. Huperzine A ...