Possible side effects of Alka-Seltzer effervescent tablets: All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome: Heartburn; nausea; upset stomach.
A myoclonic jerk is the brief, involuntary twitching of a muscle or group of muscles. It may be caused either by a sudden muscle contraction, or a sudden lapse of contraction.
When jerks result from brief cessation of ongoing muscular activity, they are called negative myoclonus (NM). Positive myoclonus is generally more common, while NM frequently occurs in hospital settings, as a result of toxicâmetabolic causes.