Can testosterone cause a rapid heartbeat?

Yes, rarely: Although rare, rapid heart beat has been described with testosterone use. One mechanism of this is that rarely testosterone can cause a drop in blood sugar. This can result in a rapid hearbeat as the body releases adrenaline in response to the low blood sugar level.

Article Referral: "the mayo clinic says that the following medications could interact negatively with testosterone therapy and using them together isn't recommended: anisindione, bupropion, dicumarol, paclitaxel, Paclitaxel protein-bound, warfarin and phenprocoumon. If you're currently taking one of these medications, speak with your doctor before discontinuing either." read more: rapid heartbeat & testosterone th.