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.
Jerks or âsleep startsâ while falling asleep is a normal occurrence in healthy persons and does not cause difficulties. However, widespread myoclonus includes persistent, shock-like contractions in a muscle group. In some cases, it starts in a particular area of the body and spreads to muscles in other regions. Severe cases cause distortion in movement and significantly limit a personâs ability to eat, talk or walk, says the NINDS. These types of myoclonus indicate an underlying disorder in the nerves or brain.