Hello Thanks for posting Although uncommon but they do have side effect like- Common Side Effects are- These include upset stomach, nausea, heartburn, vomiting, diarrhoea, increased thirst, dehydration, stomach pains, bloating and sore throat. These affect only a small number of users. Severe Side Effects are- Some of these side effects include severe allergic reaction, difficulty breathing, sore throat, swelling of the lips and throat, tightening of the chest and trouble swallowing. These side effects also are very rare and do not affect a large number of patient. Hope this helps.