Most forskolin side effects are relatively mild in nature and may include restlessness, coughing, or tremors. Gastrointestinal disturbances or circulatory disorders may sometimes develop when using this medication. Diabetics and women who are pregnant or breastfeeding should use this method of treatment only under the direct supervision of a doctor due to possible complications such as abnormal blood sugar levels or excessive bleeding. Any specific questions or concerns about potential forskolin side effects in an individual situation should be discussed with a doctor or other medical professional.

Forskolin is sometimes used as a treatment for insomnia, although it may occasionally have the reverse effect and cause restlessness instead. A cough or sore throat may sometimes develop when using an inhaled form of this herb. Occasionally, uncontrolled muscle movements known as tremors may occur.

Excess stomach acid may be among the possible forskolin side effects, leading to symptoms such as heartburn, nausea, or weight loss. Those who have been diagnosed with gastrointestinal problems such as stomach ulcers should not use this herb without close medical supervision. Additional damage to the lining of the stomach may occur when this supplement is used by those with preexisting digestive issues. Severe injury to the digestive system may require surgical intervention to repair damaged tissues.

Patients with diabetes are often advised to avoid the use of supplements containing forskolin due to the possibility of increased lipid levels in the blood. If this herb is used, blood sugar levels should be checked regularly. Women who are pregnant or breastfeeding are usually asked to avoid the use of this herb due to possible bleeding issues and potential risks to the baby. There is not enough reliable medical information concerning whether this supplement is excreted through breast milk, so it is probably best to avoid forskolin while nursing.

Cardiovascular problems are potentially serious forskolin side effects. As this supplement is known to naturally lower blood pressure, it should not be used by those who have high or low blood pressure, especially if medications are being used to control these issues. Bleeding disorders may occur as a result of the use of this herb, especially among those who have recently suffered a traumatic injury or had a surgical procedure performed. Heart disease and sudden death are among the most severe potential forskolin side effects, and this supplement may interfere with the effectiveness of medications traditionally used to treat heart disease.